Evaluation method of relationship between non-static water body water level and submerged population in mountainous area

Abstract

The invention discloses a method for evaluating relation between the non-static water level and population affected by submerging in a mountain region. The method comprises the following steps: plotting a river track line; projecting typical historical waterflood investigation floodmark points and buildings on both sides onto the river track line, and fusing the water level of the floodmark points and building foundation elevation information so as to form a typical historical waterflood level and building foundation elevation contrast system; comparing the water level of a water surface line with the building foundation elevation difference according to the distance from an initial point based on the contrast system one by one, obtaining the submerging water depth of each building, specifying a representative station, establishing association between the water level of the representative station and typical waterflood; if the gradient of a water surface is constant, calculating the differences between different water levels and the water level of a typical year representative station, directly calculating the submerging water depth of each building under the different water levels, associating with the population of residents and establishing a relation between the water level and the population affected by submerging. By virtue of considering the fact that the slope of a riverway in the mountain region is great, and fusing the investigation waterflood information and the plotting result, a building and waterflood contrast coordinate system is established by use of the projection method and is a key means for evaluating waterflood influence in the mountain region and determining prewarning indexes.

Description

technical field [0001] The invention relates to the field of early warning of floods in mountainous areas, solving a method for evaluating the relationship between the water level of a non-static water body with a large water level drop in a river section and the population affected by submergence, which solves the problem of large river slopes and steep water surface gradients in mountainous areas. Background technique [0002] The frequent occurrence of mountain torrent disasters is one of the typical natural disasters that threaten the survival and development of human beings. The occurrence of flash flood disasters is highly random and affects a wide range, resulting in large losses and many casualties. Especially in the southern and southwestern regions of my country, it has become the top priority of defense, and early warning of flash flood threat areas is very necessary. [0003] Flood early warning in mountainous areas must know the scope of early warning, grasp the...

AI Technical Summary

Problems solved by technology

The problem is that it is difficult to obtain comprehensive information on the flood surface, and only limited flood trace survey data of typical floods can be obtained through investigation methods. Regional equivalence analysis is difficult to achieve, only necessary simplifications can be taken

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