Case study:Restoration of the marsh "Gallega"

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Location: 37° 6' 32.39" N, 6° 22' 46.03" W

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Project overview

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Status	Complete
Project web site
Themes
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.

Monitoring surveys and results

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Lessons learnt

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Catchment and subcatchment

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Catchment

River basin district	C.H.Guadalquivir
River basin	Guadalquivir

Subcatchment

River name	Guadiamar
Area category
Area (km2)
Maximum altitude category	Less than 100 m
Maximum altitude (m)	2 m0.002 km <br />200 cm <br />
Dominant geology	Calcareous, Silts and clays
Ecoregion	Ibero-Macaronesian
Dominant land cover	Wetland
Waterbody ID

Other case studies in this subcatchment: Design and Application of a Sustainable Soil Management Model for Orchard Crops in the Doñana National Park Area, Restoration of the marsh "Gallega"

Site

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Name	Marisma Gallega
WFD water body codes
WFD (national) typology
WFD water body name
Pre-project morphology	Marsh
Reference morphology	Marsh
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	Silt, Clay
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

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Reach length directly affected (m)
Project started	2005/01/01
Works started
Works completed	2005/11/01
Project completed
Total cost category	1000 - 5000 k€
Total cost (k€)	2746 k€2,746,000 € <br />
Benefit to cost ratio
Funding sources	FEDER, 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
Monitoring

Reasons for river restoration

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Mitigation of a pressure	Pollution incident
Hydromorphology	Channel pattern/planform
Biology
Physico-chemical
Other reasons for the project

Measures

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Structural measures
Bank/bed modifications
Floodplain / River corridor
Planform / Channel pattern	Restore the original morphology of the marsh, Reconnect and restore aquatic habitats
Other	Permeabilize the side wall of the FAO
Non-structural measures
Management interventions
Social measures (incl. engagement)
Other

Monitoring

Hydromorphological quality elements

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quality elements

Element	When monitored		Type of monitoring		Control site used	Result
	Before measures	After measures	Qualitative	Quantitative

Biological quality elements

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quality elements

Element	When monitored		Type of monitoring		Control site used	Result
	Before measures	After measures	Qualitative	Quantitative

Physico-chemical quality elements

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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

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Element	When monitored		Type of monitoring		Control site used	Result
	Before measures	After measures	Qualitative	Quantitative

Monitoring documents

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Image gallery

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Aerial view of Gallega marsh in October 2004

Aerial view of Gallega marsh in 2007

Gallega marsh from the FAO embankment

Permeabilization works on the side wall

View of the drainage network in the marsh Gallega

Additional documents and videos

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Additional documentation (in Spanish)

Additional links and references

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Link	Description

Supplementary Information

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