Method for conducting quantitative evaluation on vulnerability of debris flow disasters

Abstract

The invention relates to a method for conducting quantitative evaluation on vulnerability of debris flow disasters, and belongs to the field of geological disaster risk evaluation. The method is based on a GIS and the grid technology, a debris flow active region serves as a research region, the vulnerability of a disaster-affected body serves as an object, and fourteen indexes are jointly selected to conduct evaluation on the vulnerability of the debris flow disasters. Firstly, weights of eight exposure evaluation indexes are obtained according to a computational formula of self weights and mutual weights, and the weights are accumulated to obtain an exposure value (E) of the disaster-affected body; then six evaluation indexes of response force and recovery force of the disaster-affected body are adopted, and a value of the response force (C) of the disaster-affected body and a value of the recovery force (Re) the disaster-affected body are computed through a Dissolve tool; finally, a vulnerability value (V) of each grid unit in the research region is obtained through a vulnerability computational formula. According to the method, a quantitative expression of evaluation on the vulnerability of the disaster-affected body in the debris flow active region is created through a contribution weight superposed method, an aggregate function mode of the vulnerability of the debris flow disasters is provided, and a new method is provided for conducting quantitative evaluation and risk evaluation on the vulnerability of the debris flow disasters.

Description

technical field [0001] The invention relates to a method for quantitatively evaluating the vulnerability of debris flow disasters, and belongs to the technical field of geological disaster risk assessment. Background technique [0002] Debris flow disasters have a greater impact, and their vulnerability is even more of concern. In actual research, there are still many problems that cannot be judged and solved. For example, in the study of debris flow disasters, which groups, objects and areas are vulnerable? How do vulnerable groups, objects, and regions change in different socio-economic and ecological environments? How to reduce vulnerability? How to establish a A resilient and adaptive society? This series of problems needs to be faced and resolved. [0003] In related research, people have different definitions of vulnerability for the concept of vulnerability. Different scholars in different fields have different definitions of vulnerability. Even in the same field, t...

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Problems solved by technology

At the same time, the theoretical basis of vulnerability research is relatively lacking, and the problems of indicators and evaluation models have not yet been resolved; vulnerability is mostly studied from the perspective of risk, as a function of risk, and is rarely carried out independently as a system or even as a discipline research; vulnerability is dynamic, but the driving force of vulnerability is hardly covered, and there is no literature on the dynamic change of vulnerability; vulnerability has the need of scale research, but research in this area Still blank; fragility is a complex system and therefore non-deterministic

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