Case study:MediCyn

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Location: 43° 29' 14.05" N, 4° 48' 56.95" E

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Project overview

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Status	In progress
Project web site	http://www.marseille-port.fr/fr/Page/18451
Themes	Habitat and biodiversity
Country	France
Main contact forename	Isabelle
Main contact surname	Quoniam
Main contact user ID
Contact organisation	Grand Port Maritime de Marseille
Contact organisation web site	http://www.marseille-port.fr/fr/Page/18451
Partner organisations	TOUR DU VALAT
Parent multi-site project
This is a parent project encompassing the following projects	No

Filling of one of the temporary marshes in August by pumping

Project summary

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Context The Camargue wetlands are used in many ways which correspond to different types of water management. Such anthropic practices have transformed the natural habitats in many ways. Among these, traditional gaming water management, which targets the waterfowl, consists in the introduction of fresh water during summer, a period that is usually dry in the Mediterranean climate. This change in the natural cycle of water (i.e. a shorter dry period of temporary water bodies) leads to the loss of several Mediterranean species and to the eutrophication of the habitats as the organic matter has a shorter period to mineralize. The management plan of the natural habitats of the Euromediterranean port of Marseille-Fos (GPMM) has the following objectives: (1) insure a favourable conservation status to the natural habitats and wild species, and (2) maintain traditional activities that are environmentally sustainable. Objectives and implementation Three types of water management, corresponding to 3 hydraulic calendars, will be tested: (1) the gaming calendar (July – January), (2) the Mediterranean calendar (November – April) and (3) the intermediate calendar (October – May). To that end, we will create 9 ponds within the “Relai” (one of the GPMM natural estates), and implement the 3 calendars. At the “Grand Clos” (another GPMM’s natural estates), the traditional gaming water management will be maintained but we will test the intermediate calendar at 3 ponds which will be chosen by the local hunting society (SCPAM).

Monitoring surveys and results

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Measure of the effects and future directions We will monitor the respective effects of the 3 hydraulic calendars on the Mediterranean biodiversity, together with the hunting and pastoral values. The measures target the habitat (water levels, salinity), gaming and grazing activities (hunting bags, foraging value, users satisfaction…) and biodiversity (aquatic plants, dragonflies, ducks…).

Lessons learnt

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The results of this monitoring will help the conservation managers to decide which hydraulic calendar(s) should be applied in the future to achieve the objectives of their management plan.

Image gallery

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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 Verdier marshes Area category Less than 10 km² Area (km2) Maximum altitude category Maximum altitude (m) Dominant geology Ecoregion Dominant land cover Coastal wetlands and lagoons Waterbody ID Other case studies in this subcatchment: INTERREG MED WETNET - Membership card of the Verdier Marshes-Rhone Delta Wetland Contract, Restoration of the Cassaire wetland (Rhôle delta), The Verdier marshes Site Edit site Name “Relai” and “Grand Clos” 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 EU - Special Protected Area Local/regional site designations Protected species present Yes Invasive species present Yes Species of interest Dark spreadwing Lestes macrostigma (Insecta: Odonata) 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 2018/01/01 Works started Works completed Project completed Total cost category 500 - 1000 k€ Total cost (k€) 867.027867.027 k€ <br />867,027 € <br /> Benefit to cost ratio Funding sources This project was financed by the European Union (433 513 € – 50 %), the Water Agency (Rhône Méditerranée Corse) (209 481 € – 24 %) and the Region Sud (156 000 € – 18 %). Cost for project phases Phase cost category cost exact (k€) Lead organisation Contact forename Contact surname Investigation and design 10 - 50 k€ 34.46634.466 k€ <br />34,466 € <br /> Stakeholder engagement and communication Works and works supervision 100 - 500 k€ 420.783420.783 k€ <br />420,783 € <br /> Post-project management and maintenance Monitoring 100 - 500 k€ 426.305426.305 k€ <br />426,305 € <br /> Reasons for river restoration Edit reasons for restoration Mitigation of a pressure Hydromorphology Restoration of the water cycle of the Mediterranean temporary marshes Biology Improvement of the conservation status of the Mediterranean biodiversity Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Grand Clos” site: hydraulic isolation of 3 temporary ponds to delay the date of autumn water fill in Floodplain / River corridor “Relai” site: digging of 9 temporary ponds Planform / Channel pattern Other Non-structural measures Management interventions Hydraulic calendars controlled by pumping and irrigation network Social measures (incl. engagement) Users (hunters and farmers) consultation 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 [[]] No No No No No Biological quality elements Edit biological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative [[]] No No No No No 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 Salinity Yes Yes No Yes No 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 dragonflies Yes Yes Yes No No Public perceptions Yes Yes Yes No No 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