Evolution of Channels Upstream of Dam Removal Sites
Author:
- 13 July 2005
- conference paper
- Published by American Society of Civil Engineers (ASCE)
- p. 1-12
Abstract
A generalized model of channel evolution upstream of dam removal sites has been developed based upon observations of dam removal projects, dam failures, reservoir drawdowns, at post glacial lakes and dams, along with available records and literature. The complimentary flow chart identifies a series of potential channel evolution trends and provides examples of each. The model can be used as a preliminary screening tool to assess potentialdam removal impacts. Several parameters are used to help identify potential channel trends include the presence of sediment, presence or absence of a well defined thalweg across the pool bed, type of sediment deposit, and sediment gradation. The final parameter is the ratio between the pool's width versus the anticipated pre-dam channel width, acknowledging that narrow pools behave differently from wide pools.Keywords
This publication has 9 references indexed in Scilit:
- The evolution of gravel bed channels after dam removal: Case study of the Anaconda and Union City Dam removalsGeomorphology, 2005
- Effects of Dam Removal on River Form and ProcessBioScience, 2002
- A Geomorphic Perspective on Nutrient Retention Following Dam RemovalBioScience, 2002
- Dam Removal: Challenges and Opportunities for Ecological Research and River RestorationBioScience, 2002
- Evacuation of sediments from reservoirs2001
- Dam Removal – A Tool for River Restoration on the Naugatuck River2000
- A model of channel response in disturbed alluvial channelsEarth Surface Processes and Landforms, 1989
- Development of Alluvial Stream Channels: A Five-Stage ModelGeological Society of America Bulletin, 1972
- Baselevel, Grade and PeneplainThe Journal of Geology, 1902