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WAWSC activities related to aquatic ecosystems and habitats provides unbiased science, tools, and decision support to federal, state and tribal natural resource managers to help them better manage aquatic habitats needed to support species of cultural and economic value with consideration of water use needs for human consumption, irrigation and hydropower energy production. Studies performed by the WAWSC inform how changes in land cover and water use affect the timing and magnitude of river flows and sediment transport and the subsequent impact on the abundance and location of specific types of aquatic habitats. These studies generate data and predictive models to help resource managers evaluate management scenarios and restoration activities.