Method for determining cascade reservoir interval incoming sediment amount and distributing cascade reservoir interval incoming sediment amount along flowing path

Abstract

The invention discloses a method for determining the cascade reservoir interval incoming sediment amount and distributing the cascade reservoir interval incoming sediment amount along the flowing path. The method includes the steps that firstly, the sediment runoff data of cascade reservoir main stem and branch control stations, damsites and intervals are collected; secondly, the sediment runoff and process of the damsites in the typical series year are determined according to the ratio of the average yearly sediment runoffs of the damsites to nearby control hydrometric stations in multiple years; thirdly, the sediment runoff difference between the upstream reservoir damsite and the entering-reservoir control station serves as the uncontrolled interval incoming sediment amount, and the sediment runoff difference between the upstream reservoir damsite and the downstream damsite serves as the uncontrolled interval incoming sediment amount of the downstream reservoir; fourthly, in the uncontrolled interval, when one branch has no sediment runoff data in the typical series year but has the average yearly sediment runoff data in multiple years, the branch uses the average yearly sediment runoff data in multiple years; and fifthly, other incoming sediment amount except for the know branch in the uncontrolled interval is evenly distributed into the main stem watercourse along the flowing path. By means of the method for determining the cascade reservoir interval incoming sediment amount and distributing the cascade reservoir interval incoming sediment amount along the flowing path, the cascade reservoir interval incoming sediment amount can be determined reasonably, and technical support is provided for prediction and calculation of sediment erosion and deposition of the cascade reservoir.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to a method for determining the amount of incoming sediment in cascaded reservoir intervals and allocating it along the course. Background technique [0002] my country is rich in hydropower resources, and the cascade development of many rivers has led to a sharp increase in the number of cascade reservoirs, and cascade reservoirs in various river basins have gradually formed. The problem of sediment deposition is one of the key factors affecting the long-term operation and benefit of cascade reservoirs. The joint operation of cascade reservoirs should not only consider the joint operation of water volume, but also the joint operation of sediment. Carrying out the study on the calculation of sediment erosion and deposition in cascade reservoirs will help reveal the law of sediment deposition in cascade reservoirs, and provide technical support for the optimizat...

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention is to provide a method for determining the amount of incoming sediment in the cascade reservoir interval and its distribution along the course, which can solve the problems of unreasonable distribution of sand in the interval, the process and the distribution along the course in the prior art

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