A method and system for evaluating the risk of mountain torrent disasters in villages along the river based on the dpsir model

Abstract

The present disclosure provides a method and system for evaluating the risk of mountain torrent disasters in villages along the river based on the DPSIR model. The evaluation method includes selecting the corresponding indicators of driving force factors, pressure factors, state factors, impact factors and response factors, constructing an indicator system based on the DPSIR model to form an indicator library; screening out a preset number of indicators related to each factor from the indicator library , obtain the corresponding index value and normalize it; calculate the weight of the selected index; normalize the corresponding index value of the screened pressure factor, the corresponding normalized index value of the state factor, the normalized index value of the impact factor and the response factor The corresponding normalized index values ​​are multiplied by the corresponding weights and then accumulated in the same way to obtain the pressure degree P, pressure bearing degree S, vulnerability degree I and stop loss degree R; the reduced pressure bearing degree and reduced vulnerability degree are introduced to calculate The comprehensive evaluation risk degree is obtained, and then compared with the preset risk level threshold, the current mountain torrent disaster risk level of the villages along the river is judged.

Description

technical field [0001] The disclosure belongs to the field of disaster risk assessment, and in particular relates to a method and system for mountain torrent disaster risk assessment of villages along a river based on a DPSIR model. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] Mountain torrent disasters refer to sudden floods caused by heavy rain, snowmelt and other reasons in mountainous areas. They have the characteristics of concentrated water flow, large flow velocity, strong scouring and destructive power, and sediment and even stones in the water flow, which often cause localized floods. Due to the continuous expansion of human activities, mountain torrent disasters have occurred frequently in recent years. When a mountain torrent disaster occurs, the villages along the river that are closer to the river often bear the brunt of ...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of difficult selection of mountain torrent disaster indicators, difficult construction of index system, and difficult assessment of risk status in Yanhe villages, the first aspect of this disclosure provides a DPSIR model-based method for mountain torrent disaster risk assessment of Yanhe villages, which uses a new The method of selecting flash flood disaster indicators based on the above-mentioned method introduces five criterion level factor degree models, fully considers the relationship between the factor indicators of each criterion level and the effect of buffer reduction, and introduces the degree of reduction and reduction vulnerability into the comprehensive In the risk degree calculation model, five criteria layer factor degrees and comprehensive risk degrees are used to comprehensively evaluate mountain torrent disasters in villages along the river, which improves the accuracy of mountain torrent disaster risk assessment in villages along the river

Images