Reservoir flood season sediment optimal scheduling method under cascade reservoir combined scheduling

Abstract

A reservoir flood season sediment optimal scheduling method under cascade reservoir joint scheduling comprises the following steps: 1, in a flood season, forecasting flow and sediment content data ofeach hydrological station in the next few days; 2, judging whether a phenomenon that a sand peak lags behind a flood peak exists in the flood process of the terminal reservoir area and whether a sandpeak scheduling starting condition is met or not, and if yes, starting flood season sand peak scheduling; 3, entering a flood blocking and peak clipping period; 4, entering a reservoir area sand pulling period; 5, entering a dam front sand discharging stage; and 6, ending flood season sediment peak scheduling, so as to finish reservoir flood season sediment optimal scheduling under cascade reservoir combined scheduling. The invention provides a reservoir flood season sediment optimal scheduling method under cascade reservoir combined scheduling. Starting from sediment movement rules and reservoir scheduling technology optimization, based on combined scheduling of a plurality of reservoirs from the upstream to the downstream of a river or a river reach, tail-end reservoirs perform centralized sediment discharge in a flood season, and technical support is provided for solving the problem of sediment deposition of the tail-end reservoirs.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to a method for optimal dispatching of reservoir sediment in flood season under joint dispatching of cascade reservoirs. Background technique [0002] The problem of reservoir sedimentation is a worldwide problem. According to statistics, the global annual loss of reservoir capacity due to reservoir siltation accounts for 0.5% to 1.0% of the total reservoir capacity, and it is estimated that the global reservoir capacity loss will exceed 50% by 2050. Reservoir sedimentation not only directly affects the performance of reservoir flood control, power generation, navigation, water supply and other benefits, but also the flow of water discharged under the dam becomes clear, causing deformation of the riverbed downstream of the dam, affecting the stability of the river regime, flood control, and shipping safety. [0003] Reservoir sedimentation prevention and contr...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a cascade reservoir joint dispatching method for reservoir sediment optimization during the flood season, which can solve the problem that the comprehensive benefits of the reservoir during the flood season are low in the current "clear storage and discharge" mode. Based on the joint scheduling of multiple reservoirs from the upstream to the downstream of the river or river section, the terminal reservoirs can discharge sediment intensively during the flood season, which provides technical support for solving the sedimentation problem of the terminal reservoirs and promotes the development of reservoirs. The Development of Sediment Dispatch Theory and Technology

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