Geological disaster risk comprehensive evaluation method and device considering spatial distribution characteristics

Abstract

The invention discloses a geological disaster risk comprehensive evaluation method considering spatial distribution characteristics. Comprising the following steps: aiming at spatial aggregation and dispersion characteristics of historical geological disaster points, respectively proposing a data preprocessing method which uses a clustering algorithm to extract regional clustering attributes as evaluation indexes and is based on a fishing net grid; constructing a model based on a multi-machine learning algorithm of logistic regression (LR), a support vector machine (SVM), a gradient boosting tree (GBDT) and a random forest (RF); determining an optimal model by comparing the model prediction precision with the map evaluation effect, and drawing a dangerous map; meanwhile, providing an experimental scheme for testing the technical reliability. According to the method, the model evaluation precision can be remarkably improved, the model evaluation performance can be enhanced, and the geological disaster risk map with more accurate prediction and better quality can be generated, so that a decision basis conforming to the actual situation is provided for disaster risk prevention and control planning work.

Description

technical field [0001] The invention belongs to the technical field of geological disaster engineering, and in particular relates to a method and device for comprehensively evaluating the risk of geological disasters in consideration of spatial distribution characteristics. Background technique [0002] In recent years, under the background of intensified global climate change and frequent occurrence of extreme weather events, geological disasters in my country have shown a trend of frequent occurrence, and some areas may aggravate. The suddenness, mass, complexity, and uncertainty of geological disasters have brought many difficulties to pre-disaster investigation and prevention and post-disaster emergency response, and have seriously threatened people's lives and property, regional economic development, and ecological environment security. Therefore, the detailed and precise evaluation results of geological hazard hazards are particularly important, which provide a reliabl...

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Problems solved by technology

[0006] Aiming at the low accuracy of traditional multi-hazard geological disaster risk assessment, the potential impact of spatial agglomeration and dispersion characteristics on the evaluation effectiveness is ignored in the process of model construction, and how to mine the average value of the same block contained in the spatial distribution of geological hazards. The present invention provides a comprehensive evaluation method and device for geological disaster risk considering the spatial distribution characteristics

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