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Channel response to sediment release: insights from a paired analysis of dam removal

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Collins, Mathias J., Noah P. Snyder, Graham Boardman, William S.L. Banks, Mary Andrews, Matthew E. Baker, Maricate Conlon, et al. “Channel Response to Sediment Release: Insights from a Paired Analysis of Dam Removal.” Earth Surface Processes and Landforms, January 1, 2017, n/a-n/a. doi:10.1002/esp.4108.

Summary

Dam removals with unmanaged sediment releases are good opportunities to learn about channel response to abruptly increased bed material supply. Understanding these events is important because they affect aquatic habitats and human uses of floodplains. A longstanding paradigm in geomorphology holds that response rates to landscape disturbance exponentially decay through time. However, a previous study of the Merrimack Village Dam (MVD) removal on the Souhegan River in New Hampshire, USA, showed that an exponential function poorly described the early geomorphic response. Erosion of impounded sediments there was two-phased. We had an opportunity to quantitatively test the two-phase response model proposed for MVD by extending the record [...]

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The Patapsco River watershed. Black extent rectangle delimits the Simkins Dam removal study area, detailed in Figure.JPG
“The Patapsco River watershed. Black extent rectangle delimits the Simkins Dam re”
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  • John Wesley Powell Center for Analysis and Synthesis

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noteCollins, Mathias J., Noah P. Snyder, Graham Boardman, William S.L. Banks, Mary Andrews, Matthew E. Baker, Maricate Conlon, et al. “Channel Response to Sediment Release: Insights from a Paired Analysis of Dam Removal.” Earth Surface Processes and Landforms, January 1, 2017, n/a-n/a. doi:10.1002/esp.4108.

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