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Revision as of 16:19, 11 May 2010

Pisuerga. Improvement of the ecological state of the Pisuerga river between the Aguilar de Campo dam and Alar del Rey (Palencia) 1st Stage.


Factsheet: Pisuerga. Improvement of ecological state of the river between the dam Pisuerga Aguilar de Campo and Alar del Rey (Palencia) 1st Stage.

General
Country ES
River Name Pisuerga
Site Name Pisuerga. Improvement of ecological state of the river between the dam Pisuerga Aguilar de Campo and Alar del Rey (Palencia) 1st Stage.
River Characterisation
    River typology
    Location (Lat Lon) 42.7466655047656, -4.26900386810303
    Altitude high: > 800 m
    Catchment area very large: > 10000 km2
    Geology Calcareous
    National code/
    River type name     		12 Ríos de montaña mediterránea calcárea

    Biological quality elements
    Ecosystem Services
    EU Directives
    Pressures
    Measures
    Other
    Project size 1 ha
    Approximate costs > 1 000 000 Euros
    Synergy SCI ES4140026
    Status In progress
    Period of realization 2009
    Evaluation
    Implemented by Confederación Hidrológica del Duero. Ministry of Environment


    Key features of the case study

    The regulation of the flow regime determines an artificial and seasoned flow regime, and the massive release of sediments; also, the presence of weirs difficult and block the mobility for fish upstream migration and habitat availability

    Site description

    The river segment under study is located at the region of Las Loras. Its lithology consists of alluvial material (fluvial origin) at the river channel,and marl and limestone mixed with sandy and clay materials in the rest of the basin.
    The flow regime is determined by the presence of the Aguilar dam. The partial or total elimination of the shore and riparian vegetation due to the agricultural land use has caused morphological changes in some channel reaches.
    In terms of its biota, the natural vegetation has disappeared in many places, being replaced by agricultural and forestry crops(poplar).
    the riparian vegetation is composed of willow shrubs, mainly Salix triandra, Salix elaeagnos, Salix purpurea, Salix cantabrica, and Salix salvifolia.

    Alteration of the water quality. Excess of turbidity due to the input of sediments from the Aguilar de Campoo dam.
    The presence of dikes hinder the migration of fish.

    Measures selection

    This is the first stage of the total project which envolves mitigation and preventive measures[1]. The global objectives are:

    • Improve aquatic habitats and recover aquatic communities
    • Improve longitudinal connectivity
    • Streambank stabilisation
    • Improve the structure and composition of the vegetation

    The measures comprise bank stabilisation (to reduce erosion and sediment input, and facilitate the establishment of vegetation), the installation of fish pass and spawing areas.

    Success criteria

    Ecological response

    Hydromorphological response

    Monitoring before and after implementation of the project

    Socio-economic aspects

    The project has a total budget of 3.135.508 € and is financed by the Ministry of Environment, as part of the National Strategy for River Restoration.

    Contact person within the organization

    Ignacio Rodríguez Muñóz.
    Comisario de Aguas de la Confederación Hidrográfica del Duero.
    e-mail: irm@chduero.es

    Extra background information

    This project is a complementary action to another project developed by the Confederación Hidrográfica del Duero at the reservoir of Aguilar de Campoo. With the objective of improve the water quality and the sediment flow from the reservoir, a new sluice for water intake is being constructed at the dam. Studies of the Department of Water Quality of the Confederación Hidrográfica del Duero have determined that the amount of suspended solids could be reduced if taken from a height over 12 meters above the riverbed. So far, the channels for water intake were located at low heights with consequent release of undesired sediments andan impoverishment of the water quality. The new water intake will have a maximum flow between 12 and 15 m3/s since the actual drains will remain functional. This project has a total budget of 3.500.000 € and is part of the National Strategy for River Restoration. [2]

    Aguilar de Campoo dam

    References

    1. ↑ Factsheet of the project for improve the ecological state of the Pisuerga river between the Aguilar de Campoo dam and Alar del Rey (Palencia) 1st Stage[[1]].
    2. ↑ Factsheet of the project for improve the water quality and the sediment flow at the Aguilar de Campoo dam.[[2]]

    http://www.mma.es/secciones/acm/aguas_continent_zonas_asoc/dominio_hidraulico/conserv_restaur/pdf/Rio_Pisuerga.pdf

    Related Measures

    Related Pressures

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