Retention/sedimentation basin

    Solution ID
    Description of solution
    Summary (Challenges; Objectives)

    The Serchio River Basin is defined as a basin of national interest according to Italian law. It has been identified as a ‘river basin district’ for implementing the EU’s Water Framework Directive. The unique combination of challenges that are present includes extreme drought and flooding, seismic risk as well as water pollution.

    The “Autorita di Bacino Distrettuale dell’Appennino Settentrionale”  is the authority that leads efforts to address these risks in a portion of the river basin, Massaciuccoli Lake, through the design and implementation of  diversion channel which has been funded by the Ministry of the Environment and the Protection of the Territory and the Sea. The main problem to solve with the implemented NBS measures is the runoff of soil and pollutants from the farmland to irrigation canals and from there to the nearby Lake Massaciuccoli on the Tuscan coast.

    Through the H2020 project PHUSICOS sedimentation basin  have been implemented to prevent runoff of soil and pollutants from farmlands. 

    Technical characteristics

    The basin is designed by the Reclamation Consortium Authority with the support of ADBS and external collaborators.

     The basin is 160 m wide, 250 m long and has an average depth of 1 m. For the filling and emptying phases, a threshold was created equipped with clapet valves arranged on three pipes each with a diameter of 800 mm. The threshold is protected by a wooden palisade.

    The basin is vegetated with water plants of Phragmites australis and Thypha latifolia selected for optimal uptake of pollutants (nutrients and pesticides).

    The "Autorita di Bacino Distrettuale dell’Appennino Settentrionale" has collaborated with stakeholders (local farmers and other organizations) to implement these NBSs, including the maintenance and monitoring plans, and explore planning strategies with the overall goal of developing an ecosystem-based management approach for hydrogeological risk reduction in the whole area of the Massaciuccoli Lake.

    Success factors / lessons learnt

    Co-benefits:

    • reduce runoff of pollutants from the farmland
    • a cleaner lake
    • well-being for inhabitants and for tourists, as this is an important tourist area
    • carbon storage with increased vegetation, which is not harvested
    • boosting local green economy
    • creating increased cooperation, enthusiasm, and sense of ‘ownership’ among stakeholders (farmers)
    Limiting factors / lessons learnt

    Living Labs helped increasing cooperation, enthusiasm, and sense of ‘ownership’ among stakeholders (farmers)

    Location Latitude
    43.8309000000
    Location Longitude
    10.3305000000
    Keywords
    Ecosystem (s) impacted
    Lakes
    Other challenges
    Biodiversity
    Climate adaptation
    Local communities involvement
    Other keyword
    Improved water quality
    Exposition
    Exposed assets
    Agriculture
    Actors
    Organizations involved in the implementation of the action
    • The buffer strips have been implemented through the H2020 project PHUSICOS .
    • The “Autorita di Bacino Distrettuale dell’Appennino Settentrionale” (ADBS) is the authority that leads efforts to address these risks.
    • The basin is designed by the Reclamation Consortium Authority with the support of ADBS and external collaborators.
    Temporal aspects
    Implementation time of the action
    Between 2 and 5 years
    Others
    Participatory process
    Yes
    Is it possible to transpose this action in a different context?
    Yes, but difficult to transpose
    Pictures
    Risk reduction
    Hazard
    +
    Exposure
    +
    Feasibility
    Environment
    Water
    +
    Vegetation
    +
    Biodiversity
    +
    Society
    Community involvement
    +
    Economy