Method of determining downstream design flood of cascade reservoirs

Abstract

The invention belongs to the field of flood control safety design of reservoirs, and relates to a method of determining downstream design flood of cascade reservoirs. The method comprises the following steps that by the adoption of the Copula function, multi-dimensional simultaneous distribution of the section flood volume and the regional flood volume of the reservoirs is constructed, the explicit expression of a conditional probability function is deduced, the frequency curve of the conditional probability is dispersed, and according to the principle of probability combination discrete summation, the design value and the corresponding probability of the annular maximum peak discharge of downstream sections are determined after flood regulation is conducted through the cascade reservoirs. The method can overcome the defects of traditional determination technologies of the design flood of the cascade reservoirs, and provides more comprehensive reference information for cascade planning and development of drainage basins.

Description

technical field [0001] The invention belongs to the field of reservoir flood control safety design, and relates to a method for calculating downstream design floods of cascade reservoirs. Background technique [0002] Design floods refer to floods of various design standards specified in the planning, design and construction of water conservancy and hydropower projects. Therefore, the requirement for design flood calculation is associated with engineering design and construction. After the founding of New China, since the mid-to-late 1950s, my country began to develop large-scale water conservancy and hydropower projects. Correspondingly, relevant scientific research institutes and hydropower design institutes have carried out large-scale research and application of flood calculation methods for water conservancy and hydropower project design. . At the same time, in order to ensure the reliability of the design flood calculation results, since the 1960s, it has gradually em...

AI Technical Summary

Problems solved by technology

For the impact of a single reservoir, the method stipulated in the "Code" is relatively comprehensive and highly operable; but for cascade reservoirs, especially for a system of more than three reservoirs, the calculation workload specified in the current "Code" is heavy. In actual work, only generalized processing is often used, which not only affects the scientific rationality of the results, but also affects the accuracy of the results

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