Chapter
Apr 26, 2012
Active vs. Passive Channel Recovery Following Dam Removal: A Comparison of Approaches
Authors: Andy Selle [email protected], Mike Burke, Martin Melchior, and Greg KoonceAuthor Affiliations
Publication: World Environmental and Water Resources Congress 2007: Restoring Our Natural Habitat
Abstract
Channel design techniques have increasingly been applied to relic impoundments following dam removal. Removal of the physical barrier may only meet half of the objectives for many projects, with the balance made up by recovery of a lotic channel within the former impoundment. "Active" and "passive" channel recovery characterizes the two approaches most widely used in dam removal. Passive recovery allows the channel to evolve from an early successional, head-cut driven form to an anticipated stable late successional form utilizing little, if any, mechanical means. Active restoration attempts to accelerate channel development and provide a basis to attain a late successional channel condition. Though the late successional condition is the end objective regardless of the approach used, the means to attain this goal are quite different. This paper compares these two approaches and the effects on physical, biological, economic, and social metrics along the path to a late successional channel condition. Finally it provides recommendations for the use of the two approaches within the context of contemporary, budget-driven, dam removal projects.
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© 2007 American Society of Civil Engineers.
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Published online: Apr 26, 2012
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Affiliations
Inter-Fluve Inc., 3602 Atwood Ave, Madison, WI 53714. E-mail: [email protected]
Mike Burke
Inter-Fluve Inc., 1020 Wasco St., Hood River, OR 97031
Martin Melchior
Inter-Fluve Inc., 3602 Atwood Ave, Madison, WI 53714
Greg Koonce
Inter-Fluve Inc., 1020 Wasco St., Hood River, OR 97031
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