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Method of determining downstream design flood of cascade reservoirs

A cascaded reservoir and design flood technology, which is applied to hydraulic engineering equipment, calculation, hydraulic engineering, etc., can solve the problems of scientific rationality of the results, heavy calculation workload, and accuracy of the results

Active Publication Date: 2013-09-04
WUHAN UNIV
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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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  • Method of determining downstream design flood of cascade reservoirs
  • Method of determining downstream design flood of cascade reservoirs
  • Method of determining downstream design flood of cascade reservoirs

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Embodiment

[0055] This embodiment provides a method for deriving the design flood downstream of cascade reservoirs. On the basis of considering the correlation between flood volumes in each zone, the multi-dimensional joint distribution of flood volume in each zone is constructed using the Copula function, and the explicit expression of the conditional probability function is deduced formula, and based on the discretization of the conditional probability curve, the design flood of the downstream flood control section affected by the cascade reservoir is calculated, figure 1 It is the calculation flowchart of the present embodiment, and it is carried out according to the following steps:

[0056] 1. Establish the joint distribution of the reservoir section and the flood in each interval.

[0057] Cascade reservoirs composed of upper and lower reservoirs are the most common and representative, because multi-level reservoirs can be regarded as various combinations of two-level reservoirs. ...

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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 flood control safety design of reservoirs, and relates to a calculation method for downstream design flood of cascade reservoirs. Background technique [0002] Design flood refers to the flood 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 accompanied by engineering design and construction. After the founding of New China, since the middle and late 1950s, my country began to develop water conservancy and hydropower projects on a large scale. Correspondingly, relevant scientific research institutes and hydropower design institutes carried out large-scale research and application of flood calculation methods for water conservancy and hydropower engineering design. . At the same time, in order to ensure the reliability of design flood calculation results, since the 1960s, it has gra...

Claims

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Application Information

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IPC IPC(8): E02B1/00G06F17/50
CPCY02A10/40
Inventor 郭生练李天元刘攀陈华刘章君
Owner WUHAN UNIV
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