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https://hdl.handle.net/11681/12071| Title: | Historical bank recession at selected sites along Corps of Engineers reservoirs |
| Authors: | Gatto, Lawrence W. Doe, William W. |
| Keywords: | Erosion Reservoirs Soil erosion Aerial photography Site inspections Site reconnaissance Allegheny River (Pa. and N.Y.) Berlin Lake Big Sandy Lake Orwell Reservoir Oahe, Lake (S.D. and N.D.) Sakakawea, Lake (N.D.) Fort Peck Lake (Mont.) Dworshak Reservoir Lake Pend Oreille Rufus Woods Lake |
| Publisher: | Cold Regions Research and Engineering Laboratory (U.S.) Engineer Research and Development Center (U.S.) |
| Series/Report no.: | Special report (Cold Regions Research and Engineering Laboratory (U.S.)) ; 83-30. |
| Description: | Technical report Abstract: This analysis was done to improve our understanding of the patterns of reservoir bank recession as a preliminary step in a detailed study of reservoir bank erosion processes and environmental impacts. The specific objectives were to observe and document bank characteristics, conditions and changes along reservoirs with eroding banks, to estimate the amounts of historical bank recession, and to analyze its possible causes. Aerial photographs were used to observe the historical bank changes and to estimate bank recession. Site reconnaissance, discussions with Corps personnel, and published reports were used to evaluate possible relationships between the recession and reservoir bank conditions. As part of this analysis linear regressions were done to determine if the estimated recession rates correlate with bank and climatic conditions and with physical characteristics of the reservoirs. Many of the estimated recession rates had to be inferred from the minimum measurable distances based on photographic scales because the amount of bank recession for a particular interval was less than that which could be measured on the photographs. Because of this and because of the problems in making measurements on aerial photographs, many of the recession rates were expressed as a range between zero and a maximum value. The estimated recession rates varies from 0 to 39 ft/yr. The regression results showed unreasonable relationships and were generally not useful. Dominant bank erosion processes were wind-wave erosion, capillary wave erosion during high water periods, groundwater-induced sliding, freeze-thaw processes, rain splash and rainwash, and boat waves. However, because of the complexity of the inter-relationships of these and many other erosion processes and the variability of the processes at and between bank sites, it is necessary to do site-specific measurements and make observations year-round to evaluate the processes active at any particular site. |
| Rights: | Approved for public release; distribution is unlimited. |
| URI: | http://hdl.handle.net/11681/12071 |
| Appears in Collections: | Special Report |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| SR-83-30.pdf | 20.2 MB | Adobe PDF |  View/Open |