Case study:Recovery "CañoTravieso"

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Location: 37° 2' 1.69" N, 6° 18' 7.32" 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	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: Control and permeabilization of the marsh to the river, the Brazo de la Torre and Entremuros, 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

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Name	Caño Travieso
WFD water body codes
WFD (national) typology
WFD water body name
Pre-project morphology	Sinuous
Reference morphology	Sinuous
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	Clay, Silt
River corridor land use	Extensive agriculture, Wetland
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	2003/05/01
Works started
Works completed	2005/11/01
Project completed
Total cost category	more than 10000 k€
Total cost (k€)	35373 k€35,373,000 € <br />
Benefit to cost ratio
Funding sources	FEDER, MARM

Cost for project phases

Reasons for river restoration

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

Measures

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Structural measures
Bank/bed modifications
Floodplain / River corridor	Reconnect and restore historic aquatic habitats
Planform / Channel pattern	Restoring the natural profile of the channel, Modification or removal of existing defenses, Retrieve the original layout of the Travieso and morphology of the marshes
Other
Non-structural measures
Management interventions	Environmental restoration of the area integral transformed by agriculture
Social measures (incl. engagement)
Other