Case study:Environmental restoration of the lower section of the river Narcea in the municipalities of Salas and Pravia (Asturias)

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Location: 43° 26' 26.54" N, 6° 7' 49.34" W

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Project overview

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Status	Complete
Project web site	http://www.chcantabrico.es/index.php?option=com_content&view=article&id=207%3Aproyecto-de-restauracion-fluvial-del-bajo-narcea&catid=124%3Arestauracion-de-rios&Itemid=154&lang=es
Themes	Environmental flows and water resources, Flood risk management, Habitat and biodiversity, Hydromorphology, Land use management - forestry
Country	Spain
Main contact forename	Juan Antonio
Main contact surname	Martín Ventura
Main contact user ID
Contact organisation	C.H.Cantábrico
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Parent multi-site project
This is a parent project encompassing the following projects	No

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Despite its good condition, riparian forests are under human pressure (pipelines, agricultural practices) that have reduced its size and fragmented it. The pipelines have altered the natural processes of adjustment of the channels. Narcea River is one of the most important rivers in the North of Spain. The main actions of this project are creating a river corridor and removal of the structures that limit the development of natural geomorphic processes; control of invasive species and ways to improve the composition and extent of riparian forest; actions to mitigate the impact of flooding; comply with the requirements of the WFD.

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Image gallery

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Aerial view of Narcea River as it passes through Cornellana

Narcea River geomorphological evolution in Vega de Luerces

2006 Aerial photograph of river bars formed in the river Narcea in La Isla channeling, built in 2000.

Erosion of the bank related to the channeling of the river bed

Pictures of riparian vegetation

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.Cantábrico River basin Narcea Subcatchment River name Narcea 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 Siliceous, Calcareous Ecoregion Ibero-Macaronesian Dominant land cover Waterbody ID Site Edit site Name Tramo bajo del río Narcea entre Salas y Pravia WFD water body codes WFD (national) typology WFD water body name Pre-project morphology Sinuous, Entrenched Reference morphology Sinuous Desired post project morphology Heavily modified water body National/international site designation Local/regional site designations Site of Community Importance Protected species present Invasive species present 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 0.003 Average unit stream power (W/m2) Project background Edit project background Reach length directly affected (m) 17000 m17 km <br />1,700,000 cm <br /> Project started 2008/01/01 Works started Works completed Project completed Total cost category Total cost (k€) Benefit to cost ratio Funding sources C.H.Cantábrico 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 Flood defence Hydromorphology Channel pattern/planform, Structure & condition of riparian zones, Continuity of sediment transport Biology Physico-chemical Other reasons for the project Recreation Measures Edit Measures Structural measures Bank/bed modifications Revetmens with local species, Removal of exotic plants, New bioengineering elements in order to stabilize slope banks Floodplain / River corridor Riparian tree planting, Silvicultural treatments Planform / Channel pattern Re-instatement of old course (meander) Other Non-structural measures Management interventions Promotion and management of tourism in the river Social measures (incl. engagement) Information panels for people, New pahts near the river 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