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Fuzzy clustering analysis method-based method for determining critical rainfall threshold of landslide

A technology of fuzzy clustering analysis and fuzzy clustering, which is applied in database models, instruments, calculations, etc., can solve the problem of low accuracy and achieve the effect of avoiding misleading rate and enhancing threshold accuracy

Inactive Publication Date: 2017-08-25
XI'AN POLYTECHNIC UNIVERSITY
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for determining the critical rainfall threshold of landslides based on the fuzzy cluster analysis method, which solves the problem that the accuracy of the statistical analysis method and the similar analogy method are too low when calculating the threshold

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  • Fuzzy clustering analysis method-based method for determining critical rainfall threshold of landslide
  • Fuzzy clustering analysis method-based method for determining critical rainfall threshold of landslide
  • Fuzzy clustering analysis method-based method for determining critical rainfall threshold of landslide

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Embodiment 1

[0084] Step 1. Fuzzy clustering factor determination

[0085] On the basis of extensive field surveys, indoor comprehensive analysis, and references to domestic studies by Liu Xilin, Gong Xue, and Chen Wei, the DeFier method was used to conduct expert investigations for the purpose of determining the formation factors of landslides, and the fuzzy clustering results finally selected There are 10 factors in total as shown in Table 1. And according to the classification of importance, it is the first important (rainfall erosive force, solid material supply mode, total landslide area rate, regional climate type), the second important (structural characteristics, stratum lithology, ratio of valley density factor), The third is important (average slope slope, watershed area, unreasonable human activities). In the actual investigation, it was found that it is relatively difficult to obtain the values ​​of the two surveys of regional climate type and unreasonable human activities, so...

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Abstract

The invention discloses a fuzzy clustering analysis method-based method for determining a critical rainfall threshold of a landslide. The method comprises the steps of building an algorithm empirical model, determining the critical rainfall threshold of the landslide, and performing fuzzy clustering factor selection through a Delphi method; based on this, performing fuzzy clustering analysis of the critical rainfall threshold of the landslide, creating a data matrix and a standard data matrix, and establishing a fuzzy similar matrix; and finally performing fuzzy clustering and determining the critical rainfall threshold. According to the fuzzy clustering analysis method-based method for determining the critical rainfall threshold of the landslide, the rainfall threshold is determined by fully considering influence factors of regions through strict mathematic algorithm derivation, statistics technologies and physical means. The method is high in accuracy; the requirements of current landslide forecasting and warning can be met; the threshold accuracy is greatly improved; and reasonable determination of the critical rainfall threshold plays an important role for guaranteeing the landslide forecasting and warning accuracy.

Description

technical field [0001] The invention belongs to the technical field of landslide disaster forecasting, and in particular relates to a method for determining a landslide critical rainfall threshold based on a fuzzy clustering analysis method. Background technique [0002] With global climate change, the frequency of extreme rainfall events continues to increase, leading to an increase in global mountain torrent disasters, which has attracted much attention; my country has a vast area of ​​mountainous areas, and landslide disasters have the characteristics of high frequency, wide distribution, and serious losses. Early warning is difficult, and the main trigger factor for landslides is rainfall. In 1998, a large number of landslides, landslides and mud-rock flows were induced by torrential rain nationwide, resulting in 1,157 deaths and more than 10,000 injuries. The critical rainfall index is widely used in the prevention and control of mountain torrent disasters at home and a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
CPCG06F16/2468G06F16/285
Inventor 温宗周李璐张阳阳董勋凯王真李志文王妍李帅
Owner XI'AN POLYTECHNIC UNIVERSITY
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