Case study:Camargue’s former saltworks

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Location: 43° 25' 2.33" N, 4° 37' 55.88" E

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Project overview

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Status	In progress
Project web site	http://www.conservatoire-du-littoral.fr/siteLittoral/483/28-etangs-et-marais-des-salins-de-camargue-13_bouches-du-rhone.htm
Themes	Environmental flows and water resources, Fisheries, Habitat and biodiversity
Country	France
Main contact forename	Marc
Main contact surname	Thibault
Main contact user ID
Contact organisation	TOUR DU VALAT
Contact organisation web site	http://tourduvalat.org/en/
Partner organisations
Parent multi-site project
This is a parent project encompassing the following projects	No

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Project summary

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The former saltworks of the Camargue are located in the southeast of the Rhône delta, in the Camargue Regional Natural Park and the UNESCO’s Man and Biosphere Reserve. This site represents a vast coastal area of over 6,500 ha in the municipalities of Arles and Saintes-Maries-de-la-Mer. Developed for salt production in the 1960’s, the site was modified and managed with a human dominated water cycle during 50 years. In 2011, the site was purchased by the Conservatoire du Littoral. At that time, the main objectives for the site moved from salt production to wetland conservation. A restoration process through adaptive management was quickly put into place by the Conservatoire du Littoral (owner), the Regional Natural Park of the Camargue (coordinating manager), the Tour du Valat Research Institute and the Society for Nature Conservation (co-managers). Through these efforts, the site is becoming a highly dynamic and functional coastal wetland that reconnects the surrounding aquatic ecosystems within the Camargue Natural Regional Park. This site hosts important biodiversity and acts as a buffer against sea floods. While one of the main ambitions of the restoration project is to enhance biodiversity, the significant expansion of new halophytic vegetation can also set up a natural protective defense to reduce wave energy, height and speed induced by sea surge in the coastal lagoons, thus decreasing flood effects inland. Furthermore, coastal vegetation can help increase sediment and organic matter trapping, reducing flood risks. But most importantly, the site provides space set aside to mitigate responses to sea-level rise. This corresponds to recent scientific research recommending that “accommodation space” should be expanded by using “natural and nature-based features”.

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Catchment and subcatchment Select a catchment/subcatchment Edit the catchment and subcatchment details (affects all case studies in this subcatchment) Catchment River basin district Rhône - Méditerranée River basin Rhône-Mediterranean Subcatchment River name Camargue’s former saltworks Area category Area (km2) Maximum altitude category Maximum altitude (m) Dominant geology Ecoregion Dominant land cover Waterbody ID Site Edit site Name Camargue’s former saltworks WFD water body codes WFD (national) typology WFD water body name Pre-project morphology Reference morphology Desired post project morphology Heavily modified water body No National/international site designation Local/regional site designations Protected species present No Invasive species present No Species of interest Dominant hydrology Dominant substrate River corridor land use Average bankfull channel width category Average bankfull channel width (m) Average bankfull channel depth category Average bankfull channel depth (m) Mean discharge category Mean annual discharge (m3/s) Average channel gradient category Average channel gradient Average unit stream power (W/m2) Project background Edit project background Reach length directly affected (m) Project started 01/01/2008 Works started Works completed Project completed Total cost category Total cost (k€) Benefit to cost ratio Funding sources Water Agency, Private sector and State funding Cost for project phases Phase cost category cost exact (k€) Lead organisation Contact forename Contact surname Investigation and design Stakeholder engagement and communication Works and works supervision Post-project management and maintenance Monitoring Reasons for river restoration Edit reasons for restoration Mitigation of a pressure Hydromorphology Biology Physico-chemical Other reasons for the project Landscape enhancement Measures Edit Measures Structural measures Bank/bed modifications Floodplain / River corridor Planform / Channel pattern Other Reconnection between the sea and the lagoons, installation of water sluices, artificial bird nesting islands. Non-structural measures Management interventions wetland management Social measures (incl. engagement) Other Monitoring Hydromorphological quality elements Edit Hydromorphological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Biological quality elements Edit biological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Physico-chemical quality elements Edit Physico-chemical quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Any other monitoring, e.g. social, economic Edit Other responses Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Monitoring documents Upload monitoring documents Additional documents and videos Upload additional documents Additional links and references Edit links and references Link Description Supplementary Information Edit Supplementary Information