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Flood redistribution method

A technology for redistribution and flooding, applied in water conservancy projects, water conservancy engineering equipment, buildings, etc., can solve the problems of large differences in the shape of the design flood process, large changes in the design flood parameters of the section, and inconsistent characteristics of heavy rain and floods, and achieve good promotion. Application significance, easy operation, simple calculation effect

Inactive Publication Date: 2010-06-23
POWERCHINA ZHONGNAN ENG
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Problems solved by technology

[0016] However, in the actual design flood analysis and calculation of large and medium-sized water conservancy and hydropower projects, for a watershed with multiple cascaded reservoirs with regulating performance, the area of ​​the watershed is often large, and the characteristics of the storm and flood in the upper and lower reaches of the watershed are inconsistent. The design flood parameters of each section in the upper and lower reaches of the basin vary greatly
Especially when the Cv and Cs values ​​of the design flood are greatly different, the design flood process shape of each design section in the upstream and downstream of the watershed will be greatly different. The typical shape of the corresponding flood process will be quite different, such as figure 1 As shown in Fig. 1, the corresponding flood hydrographs corresponding to the projections have sudden changes at the junctions of different periods

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Embodiment Construction

[0037] Such as figure 2 As shown, it is a cascade reservoir group. Reservoir D is required to be designed.

[0038] figure 2The distribution of mixed cascade reservoirs is shown. The design reservoir D is affected by several cascades on the upstream trunk and tributaries. Reservoir A and reservoir B are connected in series first, and then form parallel connection with reservoir C to affect the design reservoir D. A certain partition and After the design section has the same frequency, how to allocate the corresponding flood process to other partitions, for example, after C and D have the same frequency, how to allocate the corresponding flood in the large interval between C~D (called interval 1) to (B, C)~ Interval D (referred to as interval 2), interval A to B (referred to as interval 3) and divisions above A are one of the key issues in the method of composing areas with the same frequency when considering the influence of reservoirs A, B, and C in mixed-connected cascad...

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Abstract

The invention relates to a flood redistribution method for calculating corresponding cascade reservoir group design flood in a same-frequency region composition method, which adopts the proportion of the instantaneous flow rate in a region flood process of various nodes in a typical process and the instantaneous flow rate of corresponding flood process for redistribution of the corresponding flood process. The flood redistribution method provided in the invention better solves the problem of corresponding flood redistribution in the same-frequency region composition method, provides an effective path for corresponding flood distribution work of multiple regions hereafter, fully utilizes the typical flood process composition of various regions and also can meet the water balance requirements of all over the basin during the flood routing control interval.

Description

technical field [0001] The invention relates to a method for redistribution of corresponding floods in the same-frequency area composition method in the design flood calculation of cascade reservoir groups. Background technique [0002] In recent years, my country has gradually formed a situation of developing cascade reservoirs on rivers with rich water resources, and the calculation of design floods affected by upstream cascade reservoirs has become increasingly complex. The redistribution of corresponding floods in the current same-frequency area composition method recommends in principle that "the corresponding floods occurring in the remaining subregions should be allocated according to the composition ratio of typical floods". If a subregion in the upstream has the same frequency as the design section, and the corresponding flood process interval contains multiple subregions, the corresponding flood process needs to be redistributed to each subregion according to the p...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B1/00
Inventor 曾宪仕王达雨张耀宾罗涛黄佩瑾
Owner POWERCHINA ZHONGNAN ENG
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