Sediment budget analysis for river reservoirs

The sediment budget of a reservoir on the Neckar River, Germany, was investigated by means of experimental and numerical methods. Field measurements of channel bathymetry show that sedimentation and erosion occur primarily in the lower backwater-influenced section of the reservoir, which stores appr...

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Bibliographic Details
Published in:Water, air and soil pollution air and soil pollution, 1997-10, Vol.99 (1-4), p.105-112
Main Authors: KERN, U, WESTRICH, B
Format: Article
Language:English
Subjects:
Earth sciences
Earth, ocean, space
Exact sciences and technology
Freshwater
Marine and continental quaternary
Surficial geology
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Summary:The sediment budget of a reservoir on the Neckar River, Germany, was investigated by means of experimental and numerical methods. Field measurements of channel bathymetry show that sedimentation and erosion occur primarily in the lower backwater-influenced section of the reservoir, which stores approximately 350,000 m super(3) of fine-grained deposits. Sediment load balances for two major storm events in Dec. 1993 and Apr. 1994 showed net erosion of 32,000 plus or minus 10,000 tonnes and 24,000 plus or minus 5,000 tonnes of sediment, respectively. A balanced sediment budget was found for a minor flood in Jan. 1995. In agreement with the field data, numerical simulation of sediment transport over a period of 45 years demonstrates that the river reservoir served initially as a sediment trap from 1950 to 1978, and since then as a temporary storage basin for sediment.
ISSN:0049-6979
1573-2932
DOI:10.1007/BF02406849