Mountain torrent disaster risk assessment method and early warning system based on catastrophe theory

Abstract

The invention discloses a mountain torrent disaster risk assessment method and early warning system based on a catastrophe theory. The early warning system is composed of a data acquisition system, arisk level evaluation system and a graded early warning system. The data acquisition system mainly achieves automatic acquisition of impact factors of mountain torrents by means of a remote sensing interpretation, on-site investigation and on-site monitoring combined method. The risk level evaluation system uses the catastrophe theory to construct a hierarchical structure model, calculates catastrophe progression according to a primary catastrophe model layer by layer from bottom to top, and ultimately determines the level of risk based on the catastrophe progression. The graded early warningsystem converts the evaluation level into an early warning signal, sends the early warning signal to relevant government officials and sends a forecast to surrounding residents through a wireless device. The fully automated integrated system for mountain torrent date collection, disaster risk assessment and graded early warning is established for the first time, the disadvantages of strong subjectivity in raw data collection and index weight distribution are avoided, and more accurate evaluation results are obtained from an internal action mechanism of a mountain torrent system.

Description

technical field [0001] The invention relates to a natural disaster risk classification evaluation system, in particular to a method for evaluating the risk of mountain torrent disasters and an early warning system based on catastrophe theory. Background technique [0002] Mountain torrents refer to the surface runoff phenomenon caused by heavy rainfall that fluctuates rapidly. Because of its suddenness and destructive power, it is easy to cause local disasters, and because it occurs in mountainous and hilly areas, it is called mountain torrent disasters. Due to its wide range of influence and strong destructiveness, mountain torrent disasters not only caused huge damage and threats to the lives and property safety of people in mountainous areas, but also became a major bottleneck problem restricting the economic development of mountainous areas. Therefore, the assessment and early warning of the risk of mountain torrent disasters are very important for effective disaster pre...

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Problems solved by technology

At present, although my country has a certain foundation in the study of mountain torrent disaster risk, due to the lack of original data in the study area and the influence of human factors on the determination of the weight of each influencing factor, the accuracy of the evaluation results is affected to a certain extent. sex

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