Computer Modeling of Reservoir Sedimentation and Sluicing

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by Rollin H. Hotchkiss, Univ of Nebraska-Lincoln, Lincoln, United States,
Daniel E. Mares, Univ of Nebraska-Lincoln, Lincoln, United States,

Document Type: Proceeding Paper

Part of: Waterpower '91: A New View of Hydro Resources

Abstract: A recently developed computer program which simulates the evolution, growth, and movement of a submerged delta in reservoirs was tested for Spencer Dam and Reservoir in Nebraska. The code, called DELTA, fits a vertical shock face to an aggrading channel as the bed progressively steepens. The vertical shock face separates the computational field into two distinct zones, just as in a reservoir: upstream and downstream of the delta. Spencer Reservoir completely filled with sediment in twenty to thirty years after closure in 1927. The DELTA code predicted a thirty-two year filling time using data from streamflow records, topographic maps, aerial photographs, and measured grain size distributions. Preliminary comparisons with results from the computer code HEC-6 shows that DELTA is a useful tool for reservoir sediment simulations.

Subject Headings: Sediment | Computer models | Reservoirs | Hydrologic models | Computer software | Standards and codes | Rivers and streams | Submerging | Dams | Nebraska | North America | United States

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