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Graham Sustainability Institute pres.

Webinar: Dam and Sediment in the Hudson

Sarah Fernald, Brian Yellen

Hundreds of dams built on tributaries of the Hudson River estuary have outlived their usefulness. Removing these relic dams is a priority for the state of New York in order to improve aquatic habitat connectivity, restore fish spawning grounds, and reduce the risk of dam failure. To better understand how sediment released by dam removals in the Lower Hudson River watershed will affect the 240 km-long estuary, including the potential for dam-derived sediments to help build tidal wetland resilience in the face of sea level rise, the Dams and Sediment in the Hudson (DaSH) project brought together a collaborative team of scientists and stakeholders to research key questions and provide practical tools to regulators and practitioners.

In this webinar, project team members will highlight how their multidisciplinary approach - which combined field observations with analyses of sediment transport, and integrated feedback from a broad coalition of stakeholders - allowed them to answer questions about how dam removal will impact conditions in the estuary. They will share key findings about marsh accretion and introduce a tool they developed that allows engineers and regulators to estimate the amount of sediment stored behind a dam and assess preliminary impacts of sediment release following dam removal. To learn about their findings and tools visit the DasH project page.

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