Planned relocation of municipal campsite alongside floodplain restoration in Normandy (France)

Normandy's 600 km coastline is characterised by cliffs, sandy beaches, and estuaries, which are constantly evolving in response to weather patterns and tidal dynamics. Coastal ecosystems play a critical role in protecting the region’s biodiversity, landscapes, and coastal communities from climate change impacts such as storm surge, coastal flooding, and erosion. However, historic land-use patterns and unsustainable land management practices along Normandy’s coastline expose the region’s communities and ecosystems to climate related hazards. Currently, two-thirds of Normandy's coast is threatened by coastal erosion, while also facing hazards such as flooding and sea level rise. A French National Institute of Statistics and Economic Studies ( INSEE ) study conducted in 2020 found that over 111,000 homes, 122,000 residents, and 54,000 jobs in Normandy are at risk of coastal flooding. Moreover, assessments by GIEC Normand , a climate expert group for Normandy region akin to IPCC , project that sea levels in Normandy could rise by 1.1m to 1.8m by 2100, if global warming exceeds 4°C. This increase will intensify current climate-related impacts from storms, coastal erosion, and flooding. In addition to climate related challenges, the Saâne Lower Valley faces further issues. The Saâne River, extending 41 km into the Seine-Maritime department of Normandy region, was significantly altered in the 18th century by dykes and embankments designed for agricultural drainage. These modifications disconnected the estuary from its floodplains and redirected the river through a culvert pipe into the sea, disrupting the Valley’s ecology and leading to a loss of intertidal habitat. The Valley drains into the channel between Quiberville-sur-Mer and Sainte-Marguerite-sur-Mer, where road embankments and culverts now impede water flow, causing frequent flooding and damage to businesses and infrastructure. The Quiberville-Sur-Mer Campsite , the pilot site for planned relocation under PACCo, was located on the sea front alongside the historic dykes and is just one example of a vulnerable site along Normandy’s coastline. The campsite is a vital municipal facility spanning nearly 5 hectares with over 200 sites. The campsite accounts for 40% of the income for the municipality through direct and indirect employment. This site could no longer be maintained in its location within the floodplain due to the high risk of flooding.

The PACCo project was a cross-border initiative focusing on two pilot sites: the Lower Otter Valley in East Devon (UK) and the Saâne Valley in Normandy (France). Both areas, located in estuarine regions, have experienced significant landscape changes over time. In France, building on earlier research from the Saâne Lower Valley Territorial Project 2050 and work under the EU INTERREG-funded Living with a Changing Coasts (LiCCo) project , PACCo aimed to tackle coastal climate challenges while emphasizing the importance of stakeholder collaboration. PACCo has been instrumental in delivering the key objectives and infrastructure projects set out for the Saâne Lower Valley. First adopted by local councils in 2016, the Saâne Lower Valley Territorial Project 2050 has taken actions starting in 2024 to reconnect the Saâne River to the sea. Its main objectives include: · Flood risk management: Ensuring the Saâne River can flow to the sea while managing risks of coastal flooding. · Balancing socio-economic needs in the Valley: Considering the needs of residents, farmers, fishermen, tourists, and other Valley users. · Environmental enhancement: Improving wetland quality, ecological continuity, and restoring biodiversity. Key projects planned under the Saâne Lower Valley Territorial Project 2050 included: · Relocating the Quiberville campsite and Sainte Marguerite-sur-Mer bungalows. · Implementing land use changes and managing the campsite development on the new site. · Developing a hydraulic structure to reconnect the Saâne to the sea. · Restoring the floodplain, including wetland environments and functions. The PACCo project aims to show that proactive measures can effectively adapt coastal areas to climate change. Working with stakeholders, the project focuses on several key solutions: · Awareness raising: Engaging stakeholders through public meetings and awareness raising campaigns to develop a long-term climate adaptation plan. · Protecting and Restoring Nature: Reconnecting the Saâne to its floodplain and the sea, replacing a culvert with a bridge, and restoring 50 hectares of intertidal habitats to improve flood management and the Valley’s ecology. · Relocating Businesses and Amenities: Moving the municipal campsite to higher ground to reduce flood risk and support habitat restoration, while developing a more sustainable tourist facility to boost the local economy. · Using Resilient Design: Installing new sewage treatment facilities to enhance water quality and network resilience.

Normandy’s proactive approach to managing coastal risks sets a positive example of advancing coastal resilience across Europe. At the regional level, Normandy launched the " Our Coast for Tomorrow " (Notre Littoral Pour Demain) programme in 2014 in response to climate change impacts such as coastal erosion, flooding, and sea level rise. Through this strategic framework, the regional authority coordinates local strategies and streamlines funding for adaptation projects, enabling Normandy to safeguard its coastal communities while restoring natural habitats and enhancing coastal ecosystems. Numerous local climate adaptation projects have received support under this initiative. The EU INTERREG-funded PACCo project significantly advanced the objectives and key initiatives identified in the Saâne Lower Valley Territorial Project 2050. From 2020 to 2023, the PACCo project provided critical funding and support for major infrastructure developments, laying the groundwork for long-term, resilient growth in the region. This included close collaboration with local communities to develop a comprehensive and sustainable development plan. As part of the first phase in implementing the Saâne Lower Valley Territorial Project 2050, the PACCo project set the stage for future efforts, transforming a local initiative into one with broader regional impact. It promotes proactive adaptation strategies by coordinating and delivering key infrastructure projects designed to enhance the Valley’s resilience to climate change. Relocation of municipal campsite outside the floodplain: The municipal campsite in the Saâne Valley, located east of Quiberville-sur-Mer where the Saâne River meets the sea, has faced significant fluvial flooding, with increasing risks from coastal flooding. The PACCo project oversaw the purchase of land by the municipality for the purpose of campsite relocation. The new site is located outside of the floodplain and offers convenient road access and proximity to the coast and Quiberville. The relocation site was informed by soil studies, topographical data, flood maps, risk assessments, and environmental impact assessments, ensuring a suitable location was selected with minimal environmental impact. The municipality of Quiberville acquired a 6-hectare hillside plot near Longueil for the new campsite. The new site will feature a central car park and 160 sites, including 71 for motorhomes, caravans, and vans, 32 for tents and bivouacs, and 57 rental accommodations. Sustainable design elements, such as infiltration ponds, swales, permeable surfaces for vehicle sites, and native plantings, were incorporated to minimise runoff, stabilise soils, and blend the campsite into the landscape with tree plantings to screen the area. New sewage treatment plant: As part of the relocation plan, a new high-performance sewage treatment plant was constructed in Longueil, outside the floodplain. This facility replaces five outdated treatment sites that were failing and often discharged during floods, leading to poor water quality. The new plant will serve 4,300 residents, meeting current and future demands for the next 20-30 years. It also includes an open-access educational space. The project was guided by detailed design studies and careful management to ensure timely completion. Previously, untreated discharges in Longueil had degraded water quality and harmed local biodiversity. Floodplain habitat restoration: The ongoing project, scheduled for completion by 2026, seeks to restore ecological continuity between the Saâne River and the sea, expand the floodplain, and improve intertidal habitats. By that time, approximately 50 hectares of intertidal habitat will be restored, reconnecting floodplains, wetlands, and the river to the ocean. Monitoring and evaluation is also an important part of the PACCo project. This phase was supported by local authorities who engaged stakeholders to support ongoing monitoring and evaluation of the restoration work. In the Saâne Valley, the Water Agency and Rouen University collaborated with the Mixed Union of Saâne Vienne and Scie Water Basins to assess the project’s impact. These organizations are measuring changes in fauna, flora, water salinity, riverbed evolution, sediment deposits, and the landscape. The PACCo project demonstrates that planned relocation is a powerful strategy for adapting to climate-related impacts such as coastal flooding, erosion, and storm surge.

The relocation process is costly and can put significant strain on the budget of local authorises. The municipality spent nearly 500,000 EUR acquiring land for the new campsite in Quiberville, the Caux Terroir Community of Communes invested 100,000 EUR in the new sewage treatment plant, and the National Coastal Protection Agency spent over €2 million acquiring land in the Saâne Lower Valley for wetland restoration, which will cover around 50 hectares by 2026. Initially estimated at 6.9 million EUR, the cost of building new campsite amenities rose to €8.6 million due to inflation from COVID-19 and the European geopolitical crisis. More information on funding is offered here . The PACCo project not only reduced the exposure of businesses and amenities to climate change but also supported estuarine biodiversity and landscape restoration. This included improving water quality, restoring ecosystems, and widening the river channel to enhance water flow. The benefits of these efforts, such as improved water quality and increased biodiversity, are being documented and will continue to be assessed. Community engagement was crucial for gaining support for the campsite relocation. In Quiberville-sur-Mer, the campsite is a vital source of income, attracting tourists and supporting local businesses that rely on seasonal activity.

As part of PACCo, four conditions were identified as critical to the project’s success: 1. The presence of strong stakeholder involvement and political support, especially from local authorities and community members. Normandy’s trans-boundary coastal management approach has accelerated the scaling of lessons learned from PACCo. The SMLN coordinated stakeholders and applied lessons learned across local authorities. Additionally, Normandy Region funded the Saâne Lower Valley 2050 communication strategy, developed alongside PACCo, to engage and inform local communities about project timelines and future steps. Following PACCo’s success, local authorities across Normandy have adopted similar adaptation measures combining planned relocation with coastal restoration. In December 2022, Normandy Region introduced the GIEC Normandy Action Plan , committing to carbon neutrality and climate adaptation through 34 actions across eight themes, including coastal relocation. 2. Funding was critical for project implementation, especially since the project involved land acquisition. Through the European Regional Development Fund (ERDF) 2021-2027 and the Interreg France (Channel) England programme and regional contributions, Normandy secured €25 million to update its coastal policy. This funding supports sustainable coastal management, nature-based solutions, and the relocation of public economic activities from high-risk areas. Projects must address climate change impacts, enhance ecological functions, involve stakeholders, and raise public awareness. 3. Land availability determines the pace of project implementation . Since land was available, it was much simpler to implement adaptation projects, such as relocating economic activities. 4. A dedicated team for project coordination, stakeholder engagement, and facilitation accelerated the process. Engaging landowners early was crucial for the project’s success. In the Saâne Valley, within the Saâne Lower Valley Territorial Project 2050, the National Coastal Protection Agency negotiated land purchases and formed partnerships with landowners, facilitating land acquisition and restoration work. By February 2023, the Conservatoire had acquired 63 hectares, using these for habitat restoration. The acquisition for relocating the municipal campsite was handled by a public landowner on behalf on the municipality. It also acquired the old campsite land, managed demolition and site preparation in partnership with the National Coastal Protection Agency.