Case study:Control and permeabilization of the marsh to the river, the Brazo de la Torre and Entremuros

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Location: 36° 53' 34.08" N, 6° 20' 29.45" W

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Project overview

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Status	Complete
Project web site
Themes	Environmental flows and water resources, Monitoring, Water quality
Country	Spain
Main contact forename	MARM
Main contact surname	MARM
Main contact user ID
Contact organisation	MARM
Contact organisation web site
Partner organisations
Parent multi-site project	Case_study:Doñana 2005
This is a parent project encompassing the following projects	No

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Project summary

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The project "Doñana 2005" aims to restore and rehabilitate the complex hydraulics of the marsh, allowing the system to evolve with the highest degree of naturalness and freedom possible within the constraints of the environment of social, economic, administrative, technical, cultural, etc. There are some actuations included in this project: Route water: environmental restoration project for tourist use; Restoration of the marsh "Gallega"; Control and permeabilization of the marsh to the river, the Brazo de la Torre and Entremuros; Restoration of streams Chico Soto, Soto Grande and Arroyo de la Laguna de los Reyes; Restoration of the stream of the Partido; Recovery of the functionality of Brazo de la Torre; and Recovery Caño Travieso.

The main objectives are:

• Restore water inputs to the marsh, in quantity and quality needed to restore the water dynamics of the marsh itself Doñana.
• To maintain, without interruption, the permeability between the marsh of Doñana and the Guadalquivir River estuary ensuring the incorporation of flows.
• Establish a system for evaluation and monitoring to enable a critical assessment of compliance with the plan and promote a research agenda and a specific line of disclosure, dissemination and presentation of results.
• Temporarily prevent the incorporation into the marsh of contaminated water or sediments, whereas such a risk. It is also necessary to prevent such waters can be incorporated into water systems or made available to any user.

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Aerial view of Guadalquivir River and Montaña del Río town. 2005

Embankment in Montaña del Río

Catchment and subcatchment Select a catchment/subcatchment Edit the catchment and subcatchment details (affects all case studies in this subcatchment) Catchment River basin district C.H.Guadalquivir River basin Guadalquivir Subcatchment River name Guadalquivir Area category Area (km2) Maximum altitude category Less than 100 m Maximum altitude (m) 50 m0.05 km <br />5,000 cm <br /> Dominant geology Ecoregion Ibero-Macaronesian Dominant land cover Extensive agriculture Waterbody ID Other case studies in this subcatchment: Guadiamar Green Corridor Project, Recovery "CañoTravieso", Recovery of the functionality of Brazo de la Torre, Restoration of streams Chico Soto, Soto Grande and Arroyo de la Laguna de los Reyes, Restoration of the stream of the Partido Site Edit site Name Brazo de la Torre y Entremuros WFD water body codes WFD (national) typology WFD water body name Pre-project morphology Tidal Reference morphology Tidal Desired post project morphology Heavily modified water body National/international site designation Local/regional site designations Area of Special Conservation Interest Protected species present Invasive species present Species of interest Dominant hydrology Tidal Dominant substrate Sand, Clay, Silt 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) 14600 m14.6 km <br />1,460,000 cm <br /> Project started 1998/04/01 Works started Works completed 1998/05/01 Project completed Total cost category Total cost (k€) Benefit to cost ratio Funding sources MARM 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 C.H.Guadalquivir Post-project management and maintenance C.H.Guadalquivir Monitoring Reasons for river restoration Edit reasons for restoration Mitigation of a pressure Pollution incident, Flood defence Hydromorphology Biology Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Construction of a defensive wall to prevent river pollution, After decontamination, removal of the defensive wall Floodplain / River corridor Planform / Channel pattern Other Non-structural measures Management interventions 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 documentation (in Spanish) Additional links and references Edit links and references Link Description Supplementary Information Edit Supplementary Information