The Purpose Of This Contract Is To Evaluate The Possible Effects Of The New Water Extractions On The River Ecosystem Of The Lower Section Of The Besòs River, Analyzing The Impact Of The Reduction Of Surface Flow On Aquatic Habitat, The Quality Of The Water And The Ecosystem Services Provided By The River, Such As The Recreational Use And The Landscape Value Of The River Environment. It Is Also Considered Necessary To Propose A Proposal Of Measures To Minimize These Effects, Including The Restoration Of Habitats, Measures To Ensure That The Environmental Flow Regime And Other Strategies Are Respected To Ensure Greater Ecological Resilience Of The River Landscape Within The Framework Of The New Hydroclimatic And Supply Scenarios.