Barrier lake water level reservoir capacity relation calibration method

Abstract

The invention discloses a barrier lake water level reservoir capacity relation calibration method. The method comprises four stepsof step 1, determining a drainage basin graph corresponding to a barrier lake occurrence point; step 2, cutting out a barrier lake ponding area dem from dem image data according to the drainage basin graph; step 3, making a plurality of equal straight faces at the outlet position of the dem drainage basin of the ponding area; and step 4, calculating accumulated water volumes corresponding to different elevations to obtain a water level reservoir capacity curve, andcalculating the water level reservoir capacity curve corresponding to the barrier lake according to dem digital elevation data when any point in the river collapses and the barrier lake is generated by applying the method, so that the disaster size and the escape time can be calculated and evaluated.

Description

technical field [0001] The invention relates to the technical field of hydrological forecasting, in particular to a method for determining the relationship between water level and storage capacity of a barrier lake. Background technique [0002] The barrier lake is formed by the accumulation of river channels by landslides. The barrier body formed blocks the normal flow of river water, thus forming a lake. The barrier body is not as strong as a dam and may collapse at any time. Once it collapses If the stagnant water is released violently, it will cause unforeseen loss of life and property in the downstream area. [0003] It can be seen that it is very necessary to analyze and budget the barrier lake. [0004] Using this method, if any point in the river collapses and a barrier lake is formed, the water level and storage capacity curve corresponding to the barrier lake can be calculated based on the dem digital elevation data, and then the size of the disaster and the escap...

AI Technical Summary

Problems solved by technology

[0002] The barrier lake is formed by landslides accumulating river channels. The barrier body formed blocks the normal flow of river water, thus forming a lake. The barrier body is not as strong as a dam and may collapse at any time. Once it collapses , the stagnant water will be released violently, which will cause unforeseen loss of life and property in the downstream area

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