Hydraulics & Waterways

Oral

394358 - Time-Based Estimation of Reservoir Sedimentation Impacts

Wednesday, June 6
10:30 AM - 12:00 PM
Location: Greenway CD

While storing water for municipal and agriculture uses, reservoirs increase the water surface level, reduce the flow velocity, and introduce undesired reservoir sedimentation. Removal of sediment from reservoir is costly and it usually continues to fill storage facilities. Accurate prediction of sediment distribution in a reservoir helps predict it’s life span and improves reservoir sedimentation management plans.
Existing methods to predict reservoir sediment distribution are based on the original reservoir shape. To describe reservoir sediment distribution, one usually compares the original reservoir capacity and surface area as functions of the water depth to a future reservoir capacity and surface area. In this paper, existing methods are examined with survey data of 28 reservoirs of Bureau of Reclamation. It is found that the Area Reduction Method provides the best accuracy. Further examinations show that the reservoir type determined from the reservoir shape usually does not produce the best sediment distribution fitting. Reservoir sedimentation pattern depends not only on the reservoir shape, but also on reservoir operations, water surface levels, and most probably sediment grain size.
Several reservoir operation parameters are presented in this study in an attempt to relate sediment distribution with reservoir operation. Initial results show that sediment distribution is more complex than what simple parameters can present. Poor corrections between proposed reservoir operation parameters, along with original reservoir shape, and sediment distribution are found. This paper sheds some light on complexity of the reservoir sediment distribution and provides some thoughts on future research needs.

Jianchun Huang, PhD

Hydraulic Engineer
Bureau of Reclamation

Presentation(s):

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Sean Kimbrel

Hydraulic Engineer
Bureau of Reclamation

Presentation(s):

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Blair Greimann

PhD, PE
Bureau of Reclamation

Presentation(s):

Send Email for Blair Greimann


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394358 - Time-Based Estimation of Reservoir Sedimentation Impacts



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