Case study:River restoration project in Sella, Asturias

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Location: 43° 24' 36.13" N, 5° 5' 57.12" W

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Project overview

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Status	Complete
Project web site
Themes	Environmental flows and water resources, Habitat and biodiversity, Hydromorphology, Social benefits
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
This is a parent project encompassing the following projects	No

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Project summary

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The lower Sella has a condition considered the best in the territorial scope of the Hydrographic Confederation of Cantabrian but presents problems of morphological alteration, degradation of riparian vegetation and recreational pressure The main objectives of this project are: Recover fluvial processes with which the river can rebuild a more dynamic and natural flow; Make the river increase their resilience to natural or human disturbances, defined as the ability to recover its natural state after a disturbance of natural and/or human; Encourage the creation of a sustainable structure and compatible land uses and river resources agreed by the society; Recover the beauty of the river and its banks, as well as the emotional relationship between man and his land and river landscape; Comply with the requirements of the WFD.

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Image gallery

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Aerial view of Sella River downstream Arriondas

Map of the restoration area

Defensive structure dismantled in Santianes del Terrón

Unnatural fillings on the left bank of Triongo River

Eroded reach in the fertile plain of Intrialgo River, threatening railroad tracks

Remains of old walkway

Colonization of degraded banks by invasive species (Japanese bamboo)

Remains of Vejal dam

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 Sella Subcatchment River name Sella Area category Area (km2) Maximum altitude category 100 - 200 m Maximum altitude (m) Dominant geology Siliceous Ecoregion Ibero-Macaronesian Dominant land cover Waterbody ID Site Edit site Name Tramo bajo del Sella 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 Site of Community Importance Protected species present Invasive species present Species of interest Dominant hydrology Dominant substrate River corridor land use Urban 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) 19500 m19.5 km <br />1,950,000 cm <br /> Project started 2009/01/01 Works started Works completed 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 C.H.Cantábrico Works and works supervision Post-project management and maintenance Monitoring Reasons for river restoration Edit reasons for restoration Mitigation of a pressure Hydromorphology Channel pattern/planform, Structure & condition of riparian zones Biology Physico-chemical Other reasons for the project Recreation Measures Edit Measures Structural measures Bank/bed modifications Revetmens with local species, New bioengineering elements in order to stabilize slope banks, Removal of rip-rap Floodplain / River corridor Removal of sediments, Removal of exotic plants Planform / Channel pattern Remove obstacles in the riverbed Other Non-structural measures Management interventions Promotion and management of tourism in the river Social measures (incl. engagement) Citizen participation in the restoration project 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 Add. docs. (in Spanish) Social involvement document Additional links and references Edit links and references Link Description Supplementary Information Edit Supplementary Information