SS3.21 Deconstructing Rivers: The Ecological, Geomorphic, and Social Consequences of Dam Removal
Date: Thursday, June 13, 2002
Time: 9:30:00 AM
Location: Colwood
 
GrantGE, USDA Forest Service, Pacific Northwest Research Station, Corvallis, Oregon, USA, gordon.grant@orst.edu
Bromley, C, , University of Nottingham, Nottingham, United Kingdom, bromley@geography.nottingham.ac.uk
Stewart, G, , Oregon State University, Corvallis, Oregon, USA, greg.stewart@orst.edu
 
AN OVERVIEW OF UPSTREAM AND DOWNSTREAM GEOMORPHIC RESPONSES OF RIVERS TO DAM REMOVAL
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Dam removal can be viewed as a fluvial disturbance introducing rapid geomorphic adjustments both upstream and downstream of the former dam. Key issues upstream include the rate and timing of sediment export, the character and fate of the stored sediments, and the evolution of the incising channel and remaining deposits. Downstream issues include sediment transport distances, storage in the bed and banks, and morphologic and textural adjustments of the channel. Addressing these questions requires field studies coordinated with, physical and numerical modeling of sediment transport. Using examples from the Pacific Northwest, we discuss fluvial response to dam removal and consider implications for river ecosystems.