Flood calculation method based on pipe-free silt-protecting dam burst prevention

Abstract

The invention discloses a flood calculation method based on pipe-free silt protection dam burst prevention. Firstly, whether similar results exist or not is judged; if there are similar results, dIRECT OBTAINING OF PMP, if not, if so, discriminating feature elements or element combinations calculated by the PMF; a rainstorm mode is drafted through rainstorm physical cause analysis; the rainstorm mode is divided into a local mode and a displacement mode. The rainstorm mode is maximized; selecting a water vapor factor and a power factor; rainstorm data of the same type as the selected rainstormmode is used for analysis and selection; obtaining a PMP rainstorm total amount and a space-time distribution result of the dam system; finally, PMF calculation of dam system construction is considered; a PMF of an engineering design section is obtained through runoff generation calculation and confluence calculation of a PMP, a silt dam flood calculation system based on the burst prevention design concept is established, possible maximum flood is used for runoff design and engineering stability calculation of silt dam engineering, and the dam break problem caused by over-standard flood can befundamentally solved.

Description

technical field [0001] The invention relates to the field of engineering hydrology, in particular to a flood calculation method based on the management-free silt protection dam breakage prevention. Background technique [0002] At present, the design standards for small-scale reservoirs are applied to the check dam project. Generally, the backbone dam (large) is once in 30 to 50 years, and the ordinary dam (medium and small) is once in 10 to 30 years. The flood control standard of the check dam is relatively low. The overall flood control capability is weak; second, due to investment and technical constraints, most of the check dams do not have spillways and other discharge structures, and there are hidden dangers to flood control safety when excessive floods occur, and there is even a risk of collapse; third, check dams The watershed area controlled by the project is relatively small, and most of them are located in the Loess Plateau area, where excessive floods caused by l...

AI Technical Summary

Problems solved by technology

The existing check dam design standard is once in 10 to 50 years. The frequency analysis method used to calculate the design flood of this standard has a probability of dam failure, that is, the occurrence of floods exceeding the flood control standard of the check dam, the possibility of dam failure very big

And because the check dam is composed of dam systems connected in series up and down, and there is no technical specification and flood control standard for the construction of the dam system. For a long time, the check dam has been constructed as a single dam, and the flood impact of the upstream dam group during design And whether the combined consideration is comprehensive also directly affects the rationality of the design flood

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