Flood Calculation Method Based on Non-management Protection Dam Burst Prevention

Abstract

The invention discloses a flood calculation method based on management-free silt protection dam failure prevention. Firstly, it is judged whether there are similar results. If there are similar results, the PMP is obtained directly. If not, the characteristic elements or element combinations of the PMF calculation are discriminated, and passed Analysis of the physical causes of rainstorms To formulate a rainstorm model, the rainstorm model is divided into local models and displacement models, maximize the rainstorm model, select water vapor factors and dynamic factors, and use the same type of rainstorm data as the selected rainstorm model for analysis Selected, the total amount of PMP rainstorm and the distribution of time and space of the dam system are obtained, and finally the PMF calculation of the dam system construction is considered, and the PMF of the engineering design section is obtained from the PMP through the flow calculation and confluence calculation, and a set of anti-rupture design concepts is established. The advanced check dam flood calculation system uses the maximum possible flood in the discharge design and engineering stability calculation of the check dam project, which can fundamentally solve the problem of dam failure caused by excessive flood.

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

Images