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In the face of rising sea levels, intensified storm events and ever-increasing unpredictability in our environment, the traditional paradigms of coastal management are seeing a profound transformation towards engineering solutions that work with nature and for nature. Nature has the power to do the heavy lifting when it comes to building coastal resilience, providing long-term protection and retaining our coastal values. In recent years, the emphasis in coastal engineering has switched from controlling nature to cooperating with it in order to achieve not only the design objectives, but the best outcomes for the coastal site. We, at International Coastal management, are industry experts in the field of coastal engineering, and have always recognised and understood the value and importance of working with nature in the coastal zone. Our goal has always been to develop solutions to offer resilience and sustainability in the coastal zone, backed by our extensive expertise in working with nature and the broad range of global case studies we've conducted. Cooperating with Nature There are a range of different terms being used by coastal engineers, ecologists and planners, such as Green Infrastructure, Nature Based Solutions, Living Shorelines, or Engineering with Nature, and we have been at the forefront of implementing these solutions. Each of these methods all fall under the broader framework of Eco-Engineering, which is the over-arching idea to combine the restoration or preservation of the natural environment with engineering design. One of the most straightforward methods is Green Infrastructure, or Natural Infrastructure, which is simply the use of natural areas, and engineered solutions that mimic natural processes, to manage and reduce coastal erosion and flooding. This could include dunes, beach nourishment, sediment bypassing, marine and land-based vegetation, shellfish habitat, artificial reefs etc. Nature-Based Solutions and Living Shorelines also fall within Green Infrastructure and seek to achieve a similar goal; provide coastal protection through the restoration of natural ecological processes. The important distinction here being that it is the natural ecological processes that need to be providing the coastal protection, such as coral reefs, mangroves, saltmarshes or oyster reefs themselves acting to dissipate wave energy to protect the shoreline. While these ecologies can provide effective coastal protection, it is not so simple to just ‘install’ a mangrove forest or coral reef for example. Some conventional ‘hard’ engineering aspects would likely be required to support the restoration of the ecological processes, such as rock sills, reef substrate beds, sand pumping/bypassing infrastructure, the so called ‘hybrid’ solutions. This is particularly the case on open coastlines where a significant amount of wave energy may need to be dissipated. The U.S. Army Corps of Engineers concept of Engineering with Nature is a more prescriptive form of green infrastructure that seeks to not only make use of natural systems and processes to deliver coastal protection and water management, but also integrate the solution with social, environmental and economic benefits in order to create a more socially acceptable, viable, equitable and sustainable solution. Finally, there is IENCE, or Infrastructure that Enhances the Natural Capacity of the Environment, which is another form of eco-engineering that encourages the design of coastal solutions to not only work with, but also enhance the natural environment at the site. This could include incorporating aspects of habitat restoration into conventional solutions, such as advanced marine substates or geometry/rugosity that meets ecological criteria for marine species, or mimicking the natural processes that work effective at the site, such as supporting sand dunes, offshore sand bars, headlands or artificial reefs. While there are some differences in what is required to meet the definition of each of these methods, they each share common ground with harnessing the power of the natural environment and produce sustainable coastal protection systems that can adapt to the effects of climate change and improve the overall health and resilience of coastal ecosystems and values. Whether it is IENCE, Green Infrastructure or Engineering with Nature, International Coastal Management has experience with each of these concepts and understands the need for carefully considered design and a multi-disciplinary approach in order to deliver the best outcomes for coastal sites. We worked with The Nature Conservancy and Noosa Shire Council to deliver the Huon Mundy reefs as part of the Noosa River Oyster Ecosystem Restoration Project; a first in Queensland, Australia, for its scale and a globally recognised nature-based project, which will be included in the 2023 USACE Engineering with Nature Atlas. The goal of the project was to restore the rock oyster shellfish ecosystem to the river, which had once thrived throughout the Noosa estuary and had been a significant food resource and meeting place for the local Kabi Kabi traditional owners. In addition to the multitude of environmental, social and economic benefits the restoration of the shellfish ecosystem would provide, we also recognised the potential for the reefs to provide a sustainable and resilient coastal protection system for the riverbanks, and our design of the reefs was adapted to provide this. The project has been a success for the region and has become a benchmark for NBS in the region, with restoration of oyster habitat, improvement to marine ecosystem biodiversity, eco-tourism and reconciliation with local Traditional Owners. Addressing Disaster Risk Historically, conventional 'hard' engineering options, such as boulder seawalls, have been used for coastal erosion protection against extreme storms, tropical cyclones, east coast lows and hurricanes. While these options offer great coastal protection, when properly designed, they typically offer little benefit to natural ecosystems and preservation of coastal values, and may even exacerbate coastal hazards elsewhere. Our method is distinct from more conventional approaches, as demonstrated by the Northern Gold Coast Beach Protection Strategy that we developed. As a substitute for the construction of sea walls or groynes, we decided to employ nearshore nourishment in the form of engineered sandbars as well as an artificial reef in order to stabilise the coastline. These techniques assisted in lowering erosion rates, boosting coastal resilience, and protecting local residents from the effects of severe weather occurrences. Adapting to Climate Change There is an immediate and critical need to adapt our coastal areas to the new reality as the effects of climate change continue to become more severe. Engineering with Nature, such as through nature-based solutions, living shorelines or eco-engineering provide options that are effective, sustainable and offer many secondary benefits, including carbon sequestration, enhancement of biodiversity, eco-tourism and the preservation of coastal values. The introduction of nature-based solutions into the Northern Gold Coast Beach Protection Strategy was helpful in protecting local ecosystems on the exposed shorelines, while also assuring the longevity and sustainability of our coastal defences by working with nature, instead of against it. We, at International Coastal Management, are able to design solutions that are flexible and robust by collaborating with nature, providing solutions that offer long-term sustainable protection for coastal communities in the face of changing climate conditions. Adapting more Nature Based Solutions into Design The societal challenges posed by climate change and disaster risks require innovative and sustainable solutions. Through our work at International Coastal Management, we've seen firsthand how NBS can successfully address these challenges, creating safer, more resilient coastal communities. Nature based approaches offer great coastal erosion solutions and with the right design, can be effective for a variety of sites. Get in contact with us, today and find out how to implement NBS into your coastal protection and enhancement projects We are committed to pushing the boundaries of what's possible in coastal engineering, using our experience and knowledge to implement NBS globally. If you're interested in learning more about our work or how NBS can benefit your coastal community, please visit our website or get in touch with us directly.

International Coastal Management has always believed in the ability to adapt. We have implemented nature-based solutions (NBS) in our coastal engineering initiatives in response to the escalating challenges posed by climate change. As a global leader in NBS, we understand that adaptation is about more than merely surviving; it is about flourishing. In this post, we'll discuss NBS's crucial role in climate change adaptation and highlight one of our pioneering initiatives. Climate change is one of the most pressing societal challenges of our time, with coastal areas bearing the brunt of its impacts. Sea-level rise, increased storm intensity, and changing precipitation patterns pose threats to coastal communities and ecosystems. To address these issues, adaptation measures are crucial. The NBS approach to climate change adaptation is sustainable and provides multiple benefits. In addition to enhancing coastal resilience against the effects of climate change, they enhance biodiversity, enhance water quality, and provide recreational spaces. Mimicking and Replicating Natural Coastal Elements In response to climate change, mimicking naturally occurring coastal elements has become a crucial component of International Coastal Management's coastal engineering initiatives. By replicating the functionalities of natural elements such as headlands, reefs, and dune systems, we are able to construct dynamic, storm-resistant coastlines for the future. For example, artificial headlands are crucial for shoreline stabilisation, regulating longshore drift and mitigating the effects of wave energy. Similarly, artificial reefs serve as vital barriers against wave erosion while concurrently promoting marine biodiversity through the provision of new habitats. Moreover, engineered dune systems mimic their natural counterparts in protecting against coastal erosion and flooding, while simultaneously nurturing a variety of plant and animal species. By recreating these natural shoreline responses, we ensure that our coastal interventions not only protect human communities, but also function in harmony with the surrounding ecosystems, fostering a relationship that is mutually beneficial for humans and nature. Recreating Sand Deprived Storm Bars with Nearshore Nourishment Moreover, another essential strategy is nearshore nourishment. This entails the placement of a large quantity of sand in the shoreline's active zone. This strategy attempts to imitate the formation of offshore storm bars during times of increased wave activity. These storm bars are nature's first line of defence against coastal erosion during storms, as they absorb wave energy and lessen their impact on the coastline. By emulating this natural process, nearshore sustenance provides an effective and long-lasting method for shoreline stabilisation. In addition, the newly created littoral environments can also provide improved surf conditions for seasonal benefits. Thus, this approach exemplifies the ethos of International Coasts Management - the development of robust climate adaptation measures that function in harmony with nature rather than in opposition to it to best serve the environmental and local populations. A great example of this working is on the Gold Coast where International Coastal Management has played an integral part of the nearshore nourishment campaigns for the last few decades. Get in contact, today! As an industry leader in NBS, International Coastal Management is at the vanguard of climate change adaptation innovations. We believe that by designing and implementing NBS with care, we can protect our coastlines and build resilient communities. Are you curious about how nature-based solutions can benefit your community or initiative in response to climate change? For additional information, please visit our website or get in touch with us directly.

The International Coastal Management team had a great experience at the 38th International Conference on Coastal Engineering (ICCE 2024) in Rome. This year’s conference brought together leading minds in coastal engineering to explore sustainable solutions for the future of our shorelines. We are excited to share key insights from our poster presentation and the promising discussions we had with industry professionals. ICCE 2024 Poster Presentation Highlights ICM’s Sam King presented on “Working with Nature Along Open Coasts, the Past, Present and Future”, where we explored how leveraging natural processes can enhance coastal resilience. The presentation focused on: Artificial reefs, beach nourishment, and how these nature-based solutions can be applied to high-wave energy environments. Key lessons from our Gold Coast projects and how these are informing the design and implementation of our upcoming project in Oceanside, California. How AI and citizen science are being integrated into project designs to improve accuracy in predictions and outcomes. This research generated meaningful discussions, with many attendees showing interest in adopting similar approaches for their coastal resilience efforts. Key Insights from the ICCE 2024 One of the most prominent themes throughout the conference was the increasing focus on nature-based solutions to address critical issues like coastal erosion, sea-level rise, and environmental sustainability. Among these solutions, oyster reefs stood out as a vital topic of discussion, particularly for their dual role in coastal protection and ecological restoration. A prime example of this is our Noosa Oyster Ecosystem Restoration Project in Queensland, Australia. This groundbreaking initiative, led by our Senior Coastal Engineer, Sam King, involves the design, installation, and seeding of 30 reef patches with over 600,000 juvenile oysters. These reefs not only protect the riverbanks from erosion but also significantly enhance water quality and support marine biodiversity. The project, carried out in partnership with The Nature Conservancy, Noosa Council, and other local and national bodies, is a testament to how restoring natural ecosystems can benefit urban estuarine environments while protecting heritage sites. Our real-world experience with oyster reefs and other nature-based solutions resonated with many at the conference. We shared valuable data and insights from our projects, further validating the effectiveness of these approaches in creating resilient coastlines. Key Trends and Insights from ICCE 2024 There was a focus on the eco-morphodynamics of coral reefs, exploring how these natural structures interact with waves and sediments. Analysis of Nature Based Processes, including physical modelliny and implementation into numerical models to assist with design. The complexity of sea-river interactions in microtidal systems was a key topic. Presentations emphasised the importance of integrated modelling to manage flood risks in estuarine cities, especially as climate change amplifies dynamic forces such as river flows and storm surges. As coastal cities continue to expand and climate change impacts intensify, coastal adaptation was presented as one of the greatest challenges for engineers. Sessions on physical and numerical modeling in coastal engineering showcased how these tools are being used to better understand wave dynamics, shoreline processes, and flood risks. These models are essential for designing effective coastal protection measures. There was a spotlight on compound coastal flooding caused by the convergence of multiple dynamic forces like wind, waves, and storm surges. The use of fast compound flood modeling tools, such as SFINCS, was discussed as a promising approach to mitigate the impact of coastal flooding in vulnerable regions. Technical Tour Takeaways: Sam King attended the technical tour of Ostia Beach and Marina, and observed the implementation of Italy’s submerged and emerged breakwaters, along with sand nourishment techniques. It was a great chance to exchange insights and compare these systems with the work we've done around the globe—highlighting how tailored coastal protection methods can safeguard popular beaches worldwide. New Collaborations: As one of the official sponsors of the ICCE 2024, our Director Aaron Salyer and Senior Coastal Engineer Sam King were able to make valuable connections with university professionals, research labs, and government bodies across the globe who visited our booth. These discussions have opened up exciting collaborations that will advance coastal resilience efforts worldwide. For Europe, we explored potential partnerships on nearshore nourishment projects, with promising opportunities to collaborate on future research. Conversations about Asia and North America revolved around new advancements in geospatial technology and ecological reef development, opening the door for joint applications of these innovations in upcoming projects. We also had significant discussions about coastal protection solutions in North America, with the potential for a large-scale project involving local consultants. Additionally, we explored partnerships for coastal engineering projects in West Africa and Asia. Further discussions included: Mangrove studies in Australia, focusing on restoring and protecting vital coastal ecosystems based on learnings from our successful project experience Student exchange programs in Europe, aimed at fostering the next generation of coastal engineers. Increasing the modelling forecasting and outputting of nature based solutions These conversations opened exciting collaborations across multiple regions, positioning ICM to continue its leadership in innovative, nature-based coastal solutions. Looking Ahead: ICCE 2024 confirmed the growing global interest in sustainable, nature-based coastal protection. As we return from Rome, we are eager to follow up on the exciting connections we made and continue pushing the boundaries of coastal resilience through nature-based engineering solutions. If you’re interested in learning more about our work or discussing potential collaborations, please reach out to us via our contact form.

International Coastal Management was delighted to participate in the International Coastal Symposium 2024 (ICS2024), held in Doha, Qatar, from September 24–27. ICS2024 brought together experts from across the world to discuss the latest innovations in coastal management under the theme “Coastlines under Global Change.” With two key presentations, ICM’s Senior Coastal Engineer, Sam King, showcased our groundbreaking work on Nature-Based Solutions for Coastal Management in the Arabian Gulf and the Design and Construction of Floating Islands in Qatar. Presentation 1: Nature-Based Solutions for Coastal Management in the Arabian Gulf The Arabian Gulf faces unique coastal challenges due to urbanisation, environmental degradation, and the impacts of climate change. Sam King’s presentation highlighted the role of Nature-Based Solutions (NBS), such as mangrove forests, shellfish reefs, and saltmarshes, as sustainable alternatives to traditional hard-engineering coastal protections. Key insights from the presentation: NBS approaches not only offer coastal protection but also enhance biodiversity, water quality, and carbon sequestration. The region hosts a range of resilient coastal ecologies with the potential to serve as effective NBS, creating a “living shoreline” for coastal protection. Implementing these solutions in the Gulf requires tailored designs that account for local conditions, climate impacts, and community engagement. Sam emphasised the importance of integrating local traditional knowledge into coastal management plans to ensure long-term success. This session sparked great discussions about the role of NBS in enhancing coastal resilience. It is clear that maximising the benefits of NBS in the region requires a collaborative approach, combining effective stakeholder consultation, engagement with a multidisciplinary team experienced in NBS, and the development of a robust monitoring and adaptive management program. This holistic strategy ensures that NBS projects not only protect coastlines but also deliver long-term environmental, social, and economic benefits. Read the full article Presentation 2: Design and Construction of Floating Islands in Qatar As urbanisation and climate change drive demand for waterfront access and land reclamation, floating islands offer a practical solution to expand available coastal space. Sam’s second presentation focused on ICM’s work on floating islands in Qatar, a project that addresses sea-level rise, urban expansion, and the need for innovative coastal development. Key insights from the presentation: Floating and overwater structures can offer flexibility and reduce environmental impacts compared to traditional land reclamation. Careful design and construction methods are essential to ensure buoyancy, stability, and the ability to withstand dynamic environmental conditions, such as high tides and storm events. ICM’s floating islands project in Qatar is a pioneering example of integrating environmental sustainability with innovative urban development. This presentation demonstrated the potential for floating islands to transform urban waterfronts, offering an innovative solution to mitigate sea level rise impacts and provide opportunities to enhance environmental outcomes. Read the full article Key Takeaways from ICS2024 Our presentation on nature-based solutions aligned with ongoing discussions about the critical role of NBS in preserving, restoring and enhancing coastal resilience and biodiversity, as showcased in various sessions, including the panel on Coastal Resilience under Global Change. Climate change was a central focus of the symposium, highlighted in sessions such as Attribution of Alterations in Coastal Processes to Manifestations of Climate Change. Our presentation on floating islands resonated with the conference's broader theme of sustainable infrastructure. These innovative structures offer a viable alternative to traditional land reclamation, addressing the challenges of urbanisation and limited coastal land availability. The Science-to-Policy Dialogue focused on protecting Qatar’s natural environment and advancing sustainable development. Discussions emphasised the role of effective laws, legislation, and integrated laboratory systems, particularly those managed by the Ministry of Environment and Climate Change (MOECC), in safeguarding the country’s marine and coastal ecosystems. Looking Ahead ICS2024 provided an excellent platform for ICM to strengthen partnerships and discuss future collaboration opportunities. We look forward to continuing our work in Qatar and the wider Arabian Gulf, further developing coastal resilience solutions tailored to the region's unique challenges. If you missed the presentations, we invite you to connect with us to explore how these innovative solutions could benefit your next coastal project. Reach out to our team for a consultation or to receive more detailed insights from our work at ICS2024. 📧 Contact Us

ICM is proud to have been recognised at this year’s Engineers Australia Excellence Awards for our cutting-edge contributions to the field of engineering. The 2024 event celebrated Australia’s leading engineering professionals and projects, recognising innovation, technical excellence, and the outstanding impact of engineering on communities and environments. ICM’s Re:Beach Living Speed Bumps project, designed to combat severe coastal erosion in Oceanside, California, was honoured with the 'Outstanding Project Submission for Innovation'. Additionally, Senior Coastal Engineer Sam King was nominated for 'Emerging Professional Engineer of the Year' for his outstanding contributions to nature-based solutions. The Re:Beach Living Speed Bumps Project The Living Speed Bumps project is designed to address the escalating issue of coastal erosion while enhancing the surrounding marine ecosystems. This innovative solution integrates a combination of large-scale artificial reefs, eco-engineered materials, and a vegetated dune system to create a comprehensive nature-based approach to coastal protection. By incorporating advanced sand nourishment techniques and sustainable materials, the project not only slows down erosion but also supports marine biodiversity, offers public amenities, and fosters a unique intertidal marine habitat. The solution aligns environmental sustainability with community needs, setting new standards in coastal management. The project earned special recognition as an Outstanding Project Submission for Innovation for its technical ingenuity and collaborative design process, which involved extensive consultation with stakeholders, community members, and external experts. Judges praised the project, highlighting it as a prime example of how engineering innovation can address complex environmental challenges. “This design aims to solve coastline erosion in a Californian city by using advanced Australian methods to improve local living conditions and attract more tourists. It showcases innovative, research-based engineering solutions and promises to be a leading example of modern coastal management” said the Engineers Australia judging panel. Recognition for Emerging Talent In addition to ICM’s project award, Senior Coastal Engineer Sam King was recognised for his exemplary work with a nomination for Emerging Professional Engineer of the Year in Queensland. Sam’s commitment to sustainable coastal management through nature-based solutions has earned him this prestigious nomination, underscoring his passion for developing long-term, environmentally conscious engineering practices. Since joining ICM after earning his civil engineering degree from the University of Queensland, Sam has contributed to numerous landmark projects worldwide. His work spans from restoring remote fishing villages to large-scale coastal protection projects along internationally renowned coastlines. Sam’s efforts advocate for solutions that work with nature rather than against it, improving the resilience of coastal regions facing the threat of climate change and rising sea levels. “It’s an incredible honour to be nominated among such talented professionals. My work at ICM has allowed me to push the boundaries of coastal engineering, finding innovative and sustainable ways to protect our coastlines. I’m deeply grateful for this recognition and excited about the future of nature-based solutions in our field,” said Sam King. Angus Jackson, founder of ICM, reflected on the company’s success at the awards in both the project recognition and Sam’s nomination. “Being recognised for innovation and talent is a testament to the strength and dedication of the ICM team,” said Jackson. “The Re:Beach project represents our commitment to developing sustainable solutions for coastal protection, and Sam’s nomination highlights the passion and expertise that drives our approach. We’re incredibly proud of these achievements, and we’re looking forward to continuing to lead the way in coastal engineering.” Engineers Australia Excellence Awards Engineers Australia’s Excellence Awards have a long history of promoting the engineering profession, celebrating the outstanding achievements of individual professionals and engineering teams. Divided into People Awards and Project Awards, the program recognises those at the forefront of engineering innovation across Australia. ICM’s recognition in this year’s program highlights our role as a leader in the field of sustainable coastal management and reinforces our commitment to developing forward-thinking, nature-based solutions for coastal protection. As we continue to lead new approaches to engineering challenges, we look forward to further collaborations that combine innovation, environmental sustainability, and community benefits.

In the coastal protection and enhancement sphere, the name International Coastal Management (ICM) resonates with a legacy of passion, innovation, and global outreach. This year, we take immense pride in announcing our substantial presence at the landmark Australasian Coasts and Ports Conference, an event we hold in high regard and frequently attend. As a Queensland founded and headquartered company, we are well versed to the coastal climate here in the sunshine state and have been heavily involved in projects across the throughout this region. We eagerly anticipate sharing our expert insights, rekindling ties with our established industry allies, and forging connections with new collaborators. What is the Australasian Coasts and Ports Conference The Australasian Coasts & Ports Conference series stands as the leading forum in the Australasian region, fostering a platform where professionals converge to address multi-disciplinary issues concerning coasts and ports. Spanning over five decades, the conference boasts a rich history that encapsulates ideas, knowledge exchange, and invaluable discussions. Its inception in 1973, post the formation of the National Committee on Coastal and Ocean Engineering, heralded a new era in coastal engineering, emphasizing its paramount significance in conserving some of Australia's prized resources. Melding the legacy of the Australasian Port and Harbour Conferences initiated by PIANC Australia in 1986, the conference has since 1995 been recognized as the 'Australasian Coasts and Ports.' This monumental event alternates between major cities in Australia and New Zealand every two years, solidifying its reputation as the prime hub for engineers, planners, scientists, academics, and professionals from the construction sector. With a vibrant array of technical presentations, field trips, and unparalleled networking opportunities nestled within its social programs, the conference promises to enlighten, engage, and inspire. ICM - Pioneering through Innovative Experience: With our longstanding commitment to sustainable coastal solutions, ICM eagerly anticipates this event, where we'll be presenting our papers, drawing from our vast reservoir of global experiences. Each presentation aims to shed light on novel advancements in the field, fortifying our position as thought leaders in the coastal management domain. See our Technical Sessions: Wednesday 16 August 2023 Angus Jackson Nearshore Nourishment Theory and Application Session 2B: Beach Nourishment 10.30am –10.50am Delving into 40 years of nearshore nourishment, this paper highlights its efficacy in beach protection and as a tool against climate change impacts. Originating from Gold Coast trials in 1985, the method offers cost-effective alternatives using offshore sand reserves. This research illuminates its evolution, design considerations, and its impact on surfing conditions, garnering significant public support. It also provides a comprehensive cost analysis of different deposition methods and their respective benefits. Thursday 17 August 2023 Sam King Nature Based Solutions and Oyster Shellfish Reef Restoration in the Noosa River Session 8B: Nature Based Solutions 11.40am – 12.00pm Sam King and team from International Coastal Management embarked on a unique restoration project in the Noosa River. Addressing diminished oyster reefs, the team implemented living shorelines using local rock and recycled oyster shells to enhance habitat, boost bank stability, and combat climate change impacts. This project, notable for its challenging location near busy maritime channels, offers insights into innovative ecological restoration. Martin Mulcahy Emergency Coastal Protection Works and Lessons from Remote Island Construction Session 9A: Coastal Structures 2.20pm – 2.40pm Addressing the pressing concern of rapid erosion on Australia's East Coast, this paper scrutinizes short-term mitigation strategies employed in various regions. Analyzing cases like Collaroy, Wamberal, and the Gold Coast, it delves into the effectiveness of emergency interim responses post-storm events. The study also sheds light on challenges faced by remote areas such as the Great Barrier Reef and Torres Strait, emphasizing the need for innovative, local solutions for effective coastal management. Bobbie Corbett Narrowneck Artificial Reef Renewal Session 10A: Artificial Reefs 3.30pm – 3.50pm Highlighting the City of Gold Coast's initiative from 1999-2000, this paper delves into the Narrowneck Artificial Reef's construction and its objectives for coastal protection and surfing enhancement. After two decades, a renewal added 84 Geotextile Sand Containers, optimizing its performance and lifespan. Through a Design and Construct model, this study outlines the design adaptations, challenges faced during construction, and the swift project delivery within six months. This comprehensive overview covers the design, implementation, and continued monitoring of the Narrowneck artificial reef project. Reach out to us. We'd love to connect. We extend a warm invitation to industry peers, stakeholders, and coastal management aficionados to join us in this collaborative endeavor. We'll be around for the full event and are always keen to connect with likeminded, ocean-enthusiasts. Feel free to reach out direct at the event or get in touch before hand.

In June of this year, members of the coastal engineering community converged on the city of Melbourne for a workshop that broke new ground by focusing on the potential of Nature-Based Solutions (NBS) in Australia. ICM, which has been one of the nation's top specialists on NBS since the 1980s and brought with it decades of expertise and vast project experience, was one of the organisations that took part in the discussion. ICM was one of the first organisations in Australia to implement NBS, beginning with more modest research-focused projects and progressing to larger-scale regional initiatives. During the event, participants discussed one of our most noteworthy initiatives, which involved the nearshore nourishment of broad areas of the Gold Coast. In addition, our oyster project in Noosa was commended for its approach to coastal management, which earned the initiative national attention. Sam King, who will be delivering a paper on NBS and Oyster Shellfish Reef Restoration in the Noosa River at the next Australasian Coast and Ports conference, stated that "ICM is not just a participant in the discussion on NBS, we're leading it." He also states, "We are committed to driving the future of this field, as well as contributing to effective NBS implementation strategies and regulations in Australia." As a business, we have faith in the ability of NBS to provide solutions to important problems related to coastal management. NBS offer environmentally friendly solutions to the growing problem of coastal risks and the destruction of coastal ecosystems. They make use of natural resources and processes to develop solutions that are durable, flexible, and sustainable over the long term. It is not only a matter of engineering; rather, it is a matter of cooperating with nature rather than competing against it. Nevertheless, this is not the end of our job. ICM is continuing to push the limits of what is possible with NBS, both in Australia and around the world. We are in the process of deploying NBS solutions in our ongoing projects located all across Australia, and we are ready to get started on a huge pilot project located in California. We are overjoyed to have been acknowledged as leaders in NBS, and we are looking forward towards a future in which our coasts are sustainable and resilient. We are only getting started in the NBS space, so make sure you stay tuned for more information on our forthcoming initiatives and advances in NBS.

Here at International Coastal Management (ICM), we have some very exciting news to report. We are thrilled to announce that our entry for the RE:BEACH - Oceanside Coastal Resilience Design Competition has been chosen as a finalist. We're traveling from Australia's Gold Coast to California's Oceanside to provide our expertise, enthusiasm, and fresh perspective to the area. Being a part of such a monumental endeavour is an incredible honour for us. This competition is a fantastic chance for us to apply our extensive knowledge of the Gold Coast to the challenges facing the coastal community of Oceanside, California, from a global perspective. If you've been following us, you know that we've accomplished successful, beach re-nourishment campaigns in other locations around the globe. With the same dedication to skill and creativity, we will take on the task of re-nourishing Oceanside in an innovative approach building on the lessons learned. Our team is thinking ahead as well as designing for the here and now. We are looking short and long term solutions that help with sand retention and lessens coastal pressures knowing the problems will only get worse in the 21st century. Our Goal? Longevity. So that future generations can enjoy Oceanside's beautiful coastline into the future. What we've learned from experience in a project like this is that there are multiple stakeholders at play and that the design should not only benefit the beach of Oceanside but also consider the downdraft effects as well as the local surf culture and environment. As keen surfers (as well as engineers), we are mindful that disruption to existing surf breaks is very undesirable. Therefore, we will be focusing on areas away from the well established breaks. The Gold Coast is home to some incredible, world famous beaches. The success of the beaches is due to decades of careful planing, on-going work and monitoring programs. We hope to integrate these experiences and knowledge into our Oceanside approach. We also recognise the value of giving back to the local stakeholders and end users. Through a series of open seminars, we hope to get to know the locals and pick their brains. The first of these sessions will take place in Oceanside City Hall from 4 to 7 p.m. on August 29, 2023. Everyone in the neighbourhood is welcome to join us and share their thoughts. The journey throughout this design phase is going to be amazing. Our goal is to build a approach that is not only admired by the people of Oceanside but also serves as a living testimony to the synergy of international knowledge and regional context. As such, stay tuned as we want to introduce a little piece of the Gold Coast vibe to Oceanside. For more information about the project and history, check out RE:BEACH project. Cheers!

We are delighted to share our recent win in the esteemed Re:Beach Competition. The Re:Beach project emerged as a pivotal initiative by the City of Oceanside, a coastal resilience competition aimed at innovating sustainable and effective sand retention solutions for the city's beaches, which are crucial for both environmental balance and community enjoyment. Competing against 33 globally recognised companies, our unique approach to sustainable coastal management, which intricately blends innovative engineering with ecological sensitivity, led us to success in the competition with our design. This win is not just a testament to our expertise but also a reaffirmation of our commitment to creating solutions that harmonise nature with community needs. Beach Erosion in Oceanside Oceanside's struggle with beach erosion is not new. For over 80 years, the beaches of Oceanside have been consistently losing sand​​. Despite replenishing over 20 million cubic yards of sand over the decades, the shoreline continues to face significant erosion, with much of the replacement sand being rapidly washed away. The Re:Beach Competition The Re Beach project presented a formidable challenge, pitting us against thought leading companies in the field. Each brought innovative ideas and a wealth of experience, setting a high bar for creativity and feasibility. Ultimately, three finalist companies were considered for their concept designs to move forward in a open forum, public consultation process. Our preparation involved rigorous brainstorming, detailed analysis of past and current coastal management practices, and envisioning sustainable, long-term solutions. We recognised the need for a design that was not only technically sound but also resonated with the community and environmental ethos of Oceanside. The main takeaways from the initial investigations were that we needed to make a safe, sandy and accessible beach. We needed to involve surfing into design considerations (to not negatively impact the local surf, and if possible improve it). We had to create potential for improved environmental outcomes. Parallels between Oceanside, California and the Gold Coast Australia (our home base) Here on the Gold Coast we have been able to develop a lot of innovative concepts through various pilot project approaches. It was not only the physical characteristics that made both locations similar. It was the overall character and history of the locations being surf oriented, beach destinations for the region. Our founder, Angus Jackson, was also the chief coastal engineer for the Gold Coast City during the 80's and 90's. In which time he personally developed and implemented many world first's which are still in use to this day (sand bypassing system for example). So, we were able to leverage these experiences into a confident approach tactic for Oceanside. Developing our Coastal Resilience Design Concept Our proposal was built around the concept of ‘living headlands’ and a large offshore reef, aiming to create a nature-mimicking ‘speed bump’ for sand movement. This innovative design was not just a technical solution; it was a testament to our commitment to environmental stewardship and community-centric planning. The design approach also leveraged working coastal resilience projects from the Gold Coast such as artificial reefs and nearshore nourishment. Throughout the process, we actively engaged with the community and stakeholders, integrating their feedback into our design. This collaborative approach ensured that our proposal was not only innovative but also aligned with the needs and values of Oceanside residents. Challenges and Adaptations The journey was not without its challenges. Adapting to new findings, balancing technical and environmental considerations, and staying ahead in a competitive environment pushed us to our creative and professional limits. Our success can be attributed to the diverse expertise and unwavering dedication of our team members. Each brought unique skills and perspectives, driving the project towards a solution that was both imaginative and grounded in reality. Apart from Angus Jackson's groundbreaking and industry leading efforts over the last few decades we were able to leverage the important works from our Senior Principal Engineer Bobbie Corbett and her award winning work on artificial reefs (which had recently won Australia's Women in Coastal Engineering and Geo Science Award for 2023) We were also able to implement the great nature based solution works and experience of our senior coastal engineer, Sam King, who had also been recently awarded Australia's Kevin Stark Award for Excellence in Coastal and Ocean Engineering in 2023. Design Philosophy and Approach Embracing Innovation and Sustainability: At the heart of our design for the Re Beach project lies a commitment to innovation balanced with environmental sustainability. We aimed to not only solve the immediate issue of beach erosion in Oceanside but also to set a precedent for future coastal resilience projects. Our approach was guided by the philosophy of working with nature, rather than against it. The Concept of Living Headlands and Offshore Reef: Revolutionary Design Elements: Our proposal introduced the concept of 'living headlands', on shore sand dunes and a large offshore reef. These structures are designed to mimic natural barriers, effectively acting as 'speed bumps' to reduce the longshore transport of sand. This innovative approach was envisioned to provide a stable, wider beach, while also creating new habitats and recreational areas. Environmental Synergy: The living headlands and offshore reef are more than just physical structures; they are designed to integrate seamlessly with the marine ecosystem. By fostering new marine habitats and re-establishing native dune vegetation, our design aims to enhance biodiversity and support local species like the Western Snowy Plover and the Californian Least Tern. Incorporating vegetated dunes at the top of the beach has long been a design approach of ICM and has seen great success on the Gold Coast and other locations. Responding to Community Needs: Public Access and Amenities: A key aspect of our design was enhancing public access to the beach and creating significant coastal greenspace. The living headlands not only serve an ecological purpose but also provide new areas for the community to enjoy, further bridging the gap between human use and environmental conservation. Collaboration and Feedback: Throughout the design process, we actively sought and incorporated feedback from the Oceanside community. This collaborative approach ensured that our design not only met technical and environmental goals but also resonated with the people it is intended to benefit. Notable feedback during the process centred on the surfing elements while there was also encouragement for green/public space on the headlands. Future-Proofing Oceanside's Coastline: Adaptability and Resilience: Recognising the dynamic nature of coastal environments, our design is built to be adaptable and resilient. The offshore reef and living headlands are conceived to evolve over time, accommodating changes in sea level and weather patterns, thus future-proofing Oceanside’s coastline against ongoing and future environmental challenges. Slowing down the natural flow: Our design and approach is centred on the idea of 'slowing' down the natural process, not stopping it. The natural process of wave energy onto the beach and longshore transport for example will continue to happen. However, the idea is to slow down the impacts to improve beach sand retention. Growth and Development: Expanding Our Expertise: The Re Beach project was a platform for us to push the boundaries of our expertise, particularly in eco-engineered coastal resilience. The challenges we encountered and overcame have significantly contributed to our team’s growth and development. Learning from the Competitive Landscape: Competing against leading global firms provided us with a unique opportunity to interact with the best in the field. It was an enlightening experience that allowed us to benchmark our work against international standards and practices. Competition Outcome - A Unanimous Decision We are thrilled to announce that our team had the winning design in the Re Beach Competition. However, the icing on the cake is really the unanimous decision both from the Re Beach jury and from the Oceanside City Council members. It solidifies the interest for the project on all levels as well as confidence in our team to develop the next steps of the design process. Next Steps for Oceanside Moving Forward with Implementation: Finalising the Design: With the competition phase concluded, our immediate focus is on finalising the design details of the living headlands and offshore reef. This involves refining technical specifications and ensuring all aspects align with environmental regulations and community expectations. We we will be working together and building on the great work that local consultant GHD has done at the site and local region. Securing Approvals and Permits: Obtaining necessary approvals and permits from local and state authorities will be done. This critical step ensures that all environmental guidelines are meticulously followed, paving the way for a smooth project execution. Commencing Construction: Scheduling and Phasing: The construction phase will be carefully scheduled to minimise disruptions to local ecosystems and the community. We plan to implement the project in phases, allowing for continuous assessment and adaptation to any unforeseen environmental impacts. Engagement During Construction: Throughout the construction phase, we will maintain open communication with the community and stakeholders. Regular updates will be provided to keep everyone informed about the progress and any necessary adjustments. Monitoring and Evaluation: Post-Construction Monitoring: Once the construction is complete, a rigorous monitoring program will be initiated. This will track the effectiveness of the living headlands and offshore reef in sand retention and erosion control. Adapting to Feedback and Findings: The monitoring results will be crucial in evaluating the project's success and informing any necessary modifications. We are committed to adapting our approach based on these findings to ensure the project's long-term sustainability. Long-Term Vision and Impact: Future Expansion and Replication: Looking beyond the immediate implementation, we aim to explore the potential for expanding the project to other parts of Oceanside’s coastline. The insights gained from this pilot project could also serve as a model for similar coastal communities facing erosion challenges. Continued Community Involvement: We recognise the importance of continued community involvement and feedback in all future steps. The community's ongoing support and participation will be key in shaping the long-term vision and success of the project. Promoting Coastal Resilience Beyond Oceanside: Sharing Our Learnings: The knowledge and experience gained from the Re Beach project will be compiled and shared with the broader community of coastal management professionals. We aim to contribute to the global discourse on coastal resilience and climate adaptation.

Artificial reefs are an innovative solution to the growing global challenge of coastal erosion, which threatens beaches, infrastructure, and ecosystems. While traditional approaches like seawalls and groynes provide some relief, they often disrupt natural processes. Artificial reefs are man-made structures designed to work with nature to protect coastlines, support marine life, and enhance recreational opportunities. Learn how artificial reefs can prevent erosion, their design process, and the transformative benefits they bring to our coastlines. What Are Artificial Reefs & How Do They Work? Artificial reefs are engineered structures placed on the seabed to replicate the functions of natural coral reefs. Unlike traditional "hard" engineering solutions, they work with natural processes to create sustainable outcomes. The benefits of artificial reefs include: Reduce Coastal Erosion: Acting as wave breakers, artificial reefs can dissipate wave energy before it reaches the shore, minimising the risk of erosion. Create Marine Habitats: These structures provide surfaces for marine organisms to attach and grow, create a fish habitat, and build biodiversity. Support Recreation: Artificial reefs can enhance surfing, snorkelling, and diving opportunities, making them valuable for tourism and local economies. The Evolution of Multipurpose Artificial Reefs The development of Multipurpose Artificial Reefs (MPARs) was inspired by the growing need to address two critical challenges: beach erosion and the degradation of marine ecosystems. Historically, coastal protection relied heavily on hard engineering solutions such as seawalls, breakwaters, and groynes. While these structures proved effective, they often detracted from the natural beauty of the coastline and offered limited ecological benefits. Multipurpose artificial reefs emerged as a response to these shortcomings, representing a paradigm shift in coastal management. Unlike traditional approaches, these reefs were designed to work with nature, rather than against it. They served as a dual-purpose solution, offering a coastal defence system while simultaneously encouraging marine ecosystems and recreational opportunities. A Case Study: The Gold Coast Multipurpose Artificial Reef The Gold Coast, with its iconic beaches and thriving tourism sector, has long been at the forefront of Australia’s coastal management efforts. However, this region has faced significant challenges due to coastal erosion, which threatened infrastructure, recreational spaces, and natural habitats. Traditional solutions like seawalls and groynes provided temporary relief, but sometimes at the expense of the natural dynamics of the coastline and visual amenity. As the understanding of coastal processes evolved, so did the realisation that a more integrated and sustainable approach was necessary to address the multifaceted challenges of coastal erosion and community needs. The Gold Coast Northern Beaches Protection Strategy To address these challenges, the Gold Coast launched the Northern Beaches Protection Strategy in the late 1990s. This comprehensive plan aimed to address erosion while preserving the natural beauty and functionality of the coastline. A key component of the strategy was the recognition that the protection of the coastline could not rely solely on traditional methods. Instead, it required a holistic approach that included nearshore nourishment, dune vegetation enhancement, and innovative solutions like the construction of multipurpose artificial reefs. The Role of Narrowneck Artificial Reef One of the flagship projects of the Northern Beaches Protection Strategy was the Narrowneck Artificial Reef, a pioneering example of how multipurpose artificial reefs can address erosion and enhance coastal environments. The reef was designed not only to stabilise the shoreline by reducing wave energy and encouraging sediment accumulation but also to enhance marine biodiversity and provide recreational opportunities, particularly for surfing. The artificial reef construction was based on a detailed understanding of coastal processes and the need for structures that could work in harmony with the natural dynamics of the coastline. This approach recognised that effective coastal protection requires flexibility and adaptability to changing conditions and that enhancing the ecological and recreational value of the coastline can be complementary goals. Comprehensive Coastal Management The implementation of the Narrowneck Artificial Reef was part of a broader set of interventions under the Northern Beaches Protection Strategy, which also included beach nourishment and coastal dunes vegetation enhancement. These measures worked in tandem to create a "healthy beach profile" and a "living shoreline", addressing both the immediate concerns of erosion and the long-term sustainability of the coastal environment. Sand nourishment replenished the beaches, providing immediate relief from erosion, while dune vegetation played a crucial role in stabilising the newly placed sand and enhancing the ecological value of the dunes. Together with the artificial reef, these measures exemplified a new paradigm in coastal management, where the protection of the coastline is achieved through the enhancement of its natural and recreational assets. How Multipurpose Artificial Reefs Balance Coastal Protection, the Environment & Recreation Designing Multipurpose Artificial Reefs is a careful balancing act, requiring equal attention to coastal defence, marine ecosystem support, and recreational opportunities. One of the key challenges is engineering a structure that can simultaneously dissipate wave energy to protect shorelines while also creating surfable waves and supporting marine biodiversity. The Narrowneck Artificial Reef project, led by ICM, is a prime example of this. A Multifunctional Attraction To create the artificial reef itself, mega geotextile sand containers were used, which became an attraction in itself, drawing surfers to its engineered breaks (under the right conditions). Below the waves, the reef reshapes the seabed morphology, trapping sand on its downdrift side and creating a varied underwater landscape. This creates a dynamic surf condition that extends well beyond the reef itself. Enhancing Marine Biodiversity Beyond protection and recreation, multipurpose artificial reefs play a crucial role in enhancing marine biodiversity. By mimicking natural reef structures, these provide new habitats for a variety of marine species. The design process involves selecting materials and shapes that encourage the colonisation of marine flora and fauna, turning these structures into thriving underwater ecosystems. The Narrowneck Reef, for instance, has seen a rapid development of a diverse marine ecosystem, demonstrating the ecological success of this artificial reef. Environmental assessments use quantitative methods to evaluate changes in habitat area, species diversity indices, and potential for biomass accumulation on the reef structure. Observations by the National Marine Science Centre indicate that “the biological communities associated with Narrowneck Artificial Reef appear to enhance biodiversity and productivity at a local scale and may also contribute to overall regional productivity.” Artificial Reef Design Designing artificial reefs, especially Multipurpose Artificial Reefs, is a highly specialised process that involves navigating complex hydrodynamic, geological, and environmental variables. A successful design balances coastal protection, ecological enhancement, and recreational benefits while ensuring safety for all users. Here’s a guide to the key considerations and methodologies involved in creating these innovative structures. Understanding Site-Specific Variables The foundation of artificial reef design lies in a comprehensive understanding of the site’s unique characteristics. These include: Wave Climate: Analysing wave height, period, direction, and energy flux to predict how waves will interact with the reef. Sediment Dynamics: Assessing how sand moves alongshore and cross-shore to ensure the reef enhances sediment deposition without unintended consequences. Ecological Considerations: Evaluating the existing marine habitat to ensure the reef complements local biodiversity and supports new ecosystems. Utilising advanced numerical modelling and physical models, coastal engineers can predict how the reef will interact with natural processes. These tools help refine parameters to ensure the structure’s stability, effectiveness, and safety. Defining Purpose and Functionality The primary purpose of the artificial reef dictates its design. Whether the goal is coastal protection, surf enhancement, or a combination of both, specific design parameters such as location, orientation, and dimensions must align with the desired functionality. For surf enhancement: Wave transformation models can be used to calculate the refractive effects of the reef on incoming waves, using parameters such as wave height, period, and direction. For coastal protection: Designs utilise sediment transport models to estimate the reef's impact on longshore and cross-shore sediment movement, requiring inputs like current velocities, wave energy flux, and grain size distribution of the seabed material. Selecting the Right Artificial Reef Materials Considering what are artificial reefs made of is a critical component of the design process, influencing both the reef’s durability and its ecological impact. The materials must be able to withstand marine conditions while encouraging marine life colonisation. Thoughtful material selection ensures that the reef is both functional and environmentally responsible, promoting its long-term success as a coastal and ecological asset. Considering User Safety User safety is a critical component of artificial reef design. Detailed safety assessments are conducted to minimise risks to swimmers, surfers, and divers. Safety Factors: Safety assessments involve the calculation of wave breaking intensity, water depth above the reef, and velocity fields around the structure. Safety Design Criteria: This might include setting maximum velocities (e.g., < 0.5 m/s for swimmer safety) and minimum water depths over the reef crest during low tide to prevent injuries. Conducting Risk Assessments Risk assessments play a vital role in identifying potential hazards and planning mitigation strategies. This process involves statistical analysis of wave climate data to identify extreme conditions and simulations for estimating injury risks based on user density, activity types, and environmental conditions. Optimising Design Parameters The specific design elements of the reef, including its crest width, slope, and roughness, directly affect wave-breaking characteristics, sediment deposition, and ecological performance. Computational Fluid Dynamics (CFD) models can simulate flow over the reef, providing detailed information on turbulence intensity and shear forces. Evaluating Construction Tolerances and Physical Modelling Construction tolerances are evaluated through sensitivity analysis in physical and numerical models to understand the impact of deviations from the design profile on hydrodynamic and morphological responses. This could involve adjusting the reef height or crest level within a range (e.g., ±0.1 m) in model simulations to assess changes in wave transmission and sediment deposition patterns around the reef. Implementing Risk Management Strategies Management strategies are informed by quantitative risk assessments, including the calculation of incident rates (incidents per user-hour) and the effectiveness of mitigation measures (e.g., reduction in rip current velocity by 50% with the installation of signage or barriers). Hydraulic models predict areas of high energy or currents that could pose risks to users, guiding the placement of warning signs or designated safe zones. The role of Artificial Reefs in Coastal Resilience As we face the escalating challenges of climate change and coastal erosion, the role of multipurpose artificial reefs in coastal management strategies becomes increasingly vital. These structures offer a promising pathway towards sustainable coastal protection, providing a blueprint for future projects around the world. The continued success of them relies on innovative design, rigorous scientific research, and a commitment to preserving our planet's coastal and marine environments. FAQ Do Artificial Reefs Actually Work? Artificial reefs can be effective when designed and implemented properly. These structures are engineered to work with natural processes, providing several benefits: Coastal Protection Marine Biodiversity Recreational Opportunities Projects like the Narrowneck Reef on Australia’s Gold Coast have demonstrated over a twenty year time period that improving shoreline stabilisation while supporting marine biodiversity, and improving recreational use is possible. What Are the Problems With Artificial Reefs? While artificial reefs have significant benefits, they can present challenges if not carefully designed and managed: Poor Placement: If placed incorrectly, artificial reefs can disrupt sediment transport and coastal dynamics, potentially exacerbating erosion in nearby areas. Material Issues: Using inappropriate materials can harm marine ecosystems. For example, non-durable or non-eco-friendly materials can degrade or leach harmful substances. Safety Concerns: Strong currents, shallow areas, or improperly designed reefs can pose risks to swimmers and surfers. Long-Term Monitoring: Artificial reefs require ongoing evaluation and maintenance to ensure they continue to function as intended. To mitigate these issues, proper site analysis, material selection, and risk assessments are critical during the design and implementation phases. Are Artificial Reefs 'The' Solution? The Narrowneck Reef on the Gold Coast in Australia is an example of a successful artificial reef as part of a wider coastal management strategy. Constructed as part of the Northern Beaches Protection Strategy, this multipurpose artificial reef has enhanced biodiversity and improved sand retention at a once venerable location. In general, artificial reefs should be considered as part of a holistic, coastal strategy as not as a stand-alone solution. International Coastal Management The journey of designing multiprupose artificial reefs is a testament to human ingenuity and our ability to work in harmony with nature. At ICM we've been pioneering examples of how artificial reefs can protect our coastlines while enriching the marine ecosystem and enhancing recreational opportunities for decades. As we continue to progress in the field of coastal resilience, these artificial reefs represent not just a piece of the solution but a vision for a sustainable and harmonious future between humanity and the ocean.

RPEQ-certified design review of a trial floating bird roost, supporting migratory shorebird populations in Moreton Bay. Project Details Client: Healthy Land & Water Date: 2023 Location: Moreton Bay, Queensland, Australia About This Project The Challenge A lack of migratory shorebird roosting sites adjacent to important feeding areas in Moreton Bay was contributing to both local and global population numbers. Healthy Land & Water presented ICM with a concept temporary floating bird roost design that required an engineering design review and RPEQ certification for approvals, across three strategically significant sites for migratory shorebirds within Moreton Bay. The Solution ICM conducted a site survey at each location using RTK GPS to determine approximate site bathymetry, then completed a site-specific engineering design review for each of the locations - determining design conditions and undertaking force calculations for the innovative structure and anchoring system. ICM delivered RPEQ-certified engineering drawings and a Safety in Design Assessment, allowing Healthy Land & Water to submit approvals and begin monitoring roost performance over the trial period. Services Provided Site Survey & Inspection Concept Design Review & Detailed Design Engineering Drawings with RPEQ Certification Safety in Design Assessment Get in Touch With decades of experience in nature-based coastal and marine solutions, International Coastal Management specialises in fast-turnaround engineering review that supports ecological outcomes. Contact us today to discuss your upcoming project.

Nearshore nourishment is a coastal management technique where sand is placed in the active nearshore zone, rather than pumped directly onto the dry beach. Once placed, waves and currents gradually move the sand shoreward, helping to widen the beach profile and reduce erosion risk over time. For suitable sites, nearshore nourishment can be a cost-effective way to support beach recovery, improve coastal resilience and make better use of offshore sand reserves or navigation dredging material. It can also reduce disruption to beach users compared with traditional pump-ashore nourishment. ICM has been involved in the development, design and monitoring of nearshore nourishment since the early Gold Coast trials in the 1980s. These projects helped show how placed sand can behave like a natural storm bar, moving within the active beach system and contributing to beach recovery. Why Nearshore Nourishment Was Developed Nearshore nourishment was developed as a practical response to the need for large-scale beach nourishment at a lower cost. On the Gold Coast, early onshore nourishment campaigns showed that placing sand directly on the beach could be effective, but also expensive and disruptive during construction. In 1985, nearshore nourishment was trialled on the Gold Coast using offshore sand reserves. Instead of placing all the sand directly onto the beach, part of the material was placed offshore in the active nearshore zone. Monitoring showed that the sand could remain within the beach system and move shoreward under suitable wave conditions. ICM founder Angus Jackson was closely involved in these early investigations and trials. The work helped shape a practical method that has since been used on the Gold Coast and other exposed coastlines where suitable sand sources, wave conditions and placement depths are available. Watch the video below to learn more about ICM’s role in the development of nearshore nourishment on the Gold Coast. How does Nearshore Nourishment Work? Nearshore nourishment works by placing sand within the active beach profile. The aim is to place sand where natural wave action can move it landward over time. In this way, nearshore nourishment can mimic the behaviour of natural storm bars, which form offshore during erosion events and later migrate back toward the beach during calmer conditions. What Dredge is used for Nearshore Nourishment Nearshore nourishment is commonly carried out using a trailing suction hopper dredger (TSHD). This type of dredge is often used for port and navigation channel dredging and can operate in exposed coastal conditions where swell is present. A TSHD can place sand in several ways, depending on the project objectives, water depth, vessel draft and site conditions: Bottom Dumping: sand is released through doors in the base of the vessel and placed in the nearshore zone. This is generally the lowest-cost placement method where the dredge can safely access the target depth. Rainbowing: sand is sprayed from the vessel toward shallower water. This can place sand closer to the beach or surf zone, but is generally slower and more expensive than bottom dumping. Pumping: It can pump material through a floating pipeline for precise placement. The dredge collects sand from an approved source area, stores it in its hopper, then sails to the placement area. The sand is then discharged using the selected placement method. The right method depends on the sand source, sea conditions, target placement depth, environmental controls and cost. The Benefits of Nearshore Nourishment Nearshore nourishment can provide several benefits when applied in the right setting: Lower placement costs: bottom dumping and rainbowing are generally less expensive than pumping sand directly onto the beach. Reduced beach disruption: works can often be carried out offshore, reducing impacts on beach access, beach users and local businesses. Works with natural processes: the method relies on waves and currents to move sand within the active beach system. Use of offshore or dredged sand sources: suitable sand from offshore reserves or navigation dredging can be used where approvals and sediment quality requirements are met. Potential surf amenity benefits: in some cases, placement can be designed to create temporary surfing benefits as sand moves through the nearshore zone. Nearshore Nourishment as a Nature-Based Solution Nearshore nourishment is often considered a nature-based coastal protection method because it adds sediment to the coastal system and relies on natural wave and sediment transport processes to distribute that sand. Rather than fixing the shoreline in place, it supports the beach’s ability to adjust and recover over time. However, nearshore nourishment is not suitable for every site. It requires a clear understanding of wave climate, sediment transport, sand source quality, closure depth, environmental approvals, dredge access and monitoring requirements. The best outcomes occur when the method is designed as part of a broader coastal management strategy, rather than as a one-off emergency response. Where Nearshore Nourishment Fits in Coastal Management Nearshore nourishment is one tool within a broader coastal management strategy. It can be used alongside beach monitoring, sand bypassing, dune management, artificial reefs, artificial headlands, seawalls and other coastal protection measures, depending on the site. For councils and coastal managers, the key question is not whether nearshore nourishment is always the right solution. The key question is whether the local coastal processes, sand sources, dredging access, environmental conditions and project objectives make it a suitable option. ICM supports clients through this process by assessing coastal behaviour, identifying feasible sand sources, developing placement strategies, managing approvals and designing monitoring programs to track performance over time. Learn More For an in-depth review of the history of nearshore nourishment, the trials and monitoring over specific projects and more, check out the published works by Angus Jackson and Bobbie Corbett, which were presented at the Australasian Coast and Ports Conference in 2023.