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Excessive extraction creates deep pits and alters the riverbed, leading to accelerated bank erosion and the destruction of vital aquatic habitats, impacting fish species like trout. The disturbed sediment also pollutes the water, affecting both aquatic ecosystems and human communities reliant on the river for drinking and irrigation. This exacerbates flood risk, as the altered river morphology becomes less capable of safely accommodating high water flows, leading to increased damage to infrastructure and loss of life.