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Method and system for rapid assessment of post-earthquake secondary geological hazard susceptibility

A technology for geological disasters and susceptibility, which is applied in data processing applications, complex mathematical operations, instruments, etc., can solve the problem of low accuracy in evaluating the susceptibility of secondary geological disasters after earthquakes

Inactive Publication Date: 2020-11-20
INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the present invention provides a method and system for rapid evaluation of post-earthquake secondary geological disaster susceptibility, which solves the technical problem of low accuracy in the assessment of post-earthquake secondary geological disaster susceptibility in the prior art

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  • Method and system for rapid assessment of post-earthquake secondary geological hazard susceptibility
  • Method and system for rapid assessment of post-earthquake secondary geological hazard susceptibility
  • Method and system for rapid assessment of post-earthquake secondary geological hazard susceptibility

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Embodiment 1

[0027] Embodiment 1 of the present invention describes a method for rapid assessment of post-earthquake secondary geological disaster susceptibility, figure 1 It is a flowchart of the post-earthquake secondary geological disaster susceptibility rapid assessment method described in Embodiment 1 of the present invention, such as figure 1 As shown, the evaluation method includes the following steps S101 to S113.

[0028] Step S101: Determine n evaluation indexes for post-earthquake geological disaster susceptibility.

[0029] Wherein, n is an integer greater than or equal to 3. In this embodiment, the determined evaluation indicators include indicators describing seismic features, landforms, geological conditions, hydrological conditions, human activity information, and surface vegetation. For the same feature, you can use One or more evaluation indexes describe, for example, two evaluation indexes of macro-epicenter and seismic intensity are used to evaluate earthquake characte...

Embodiment 2

[0057] Embodiment 2 of the present invention describes a method for rapid assessment of the susceptibility of secondary geological disasters after an optimal earthquake. On the basis of the above-mentioned embodiment 1, this embodiment 2 further describes the inventive concept of the present invention. Relevant parts can be referred to each other . figure 2 It is a flow chart of the post-earthquake secondary geological disaster susceptibility rapid assessment method described in Embodiment 2 of the present invention, as figure 2 As shown, the evaluation method includes the following steps.

[0058] Step ①: Obtain evaluation indicators for post-earthquake geological disaster susceptibility in the region, including evaluation of earthquake characteristics (such as macro-epicenter, seismic intensity, etc.), topography (such as elevation, slope, slope aspect, etc.), geological conditions (such as rock and soil body type, fault structure, etc.), hydrological conditions (such as ...

Embodiment 3

[0109] Embodiment 3 of the present invention describes a rapid assessment system for post-earthquake secondary geological disaster susceptibility, image 3 It is a block diagram of the post-earthquake secondary geological disaster susceptibility rapid assessment system described in Embodiment 3 of the present invention, such as image 3 As shown, the evaluation system includes an evaluation index determination module 301, an evaluation index numericalization module 302, an evaluation index discrete module 303, a sample area acquisition module 304, a sample point sampling module 305, a geological disaster occurrence ratio calculation module 306, and a function fitting module 307 , sensitivity calculation result calculation module 308 , mathematical model determination module 309 , logistic regression coefficient determination module 310 , evaluation model determination module 311 , and post-earthquake geological disaster assessment module 312 .

[0110] Among them, the evaluati...

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Abstract

The invention discloses a quick evaluation method and system for susceptibility to post-earthquake secondary geological disasters. The method comprises the steps of determining evaluation indexes of the susceptibility to the post-earthquake geological disasters, digitizing each evaluation index, conducting discretization on continuous variables to obtain sample points in sample areas, calculatingthe occurrence proportion of the geological disasters within discrete partitions corresponding to the evaluation indexes to determine the corresponding fitting functions of each evaluation index, inputting values of each evaluation index in each sample point into the corresponding fitting functions to obtain sensitivity calculation results, determining an evaluation model of an quick evaluation ofthe susceptibility to the post-earthquake secondary geological disasters, for any to-be-evaluated points, substituting the sensitivity calculation results corresponding to each evaluation index of the to-be-evaluated points into the evaluation model, the closer an acquired value is to 0, the less likely the evaluation point is to have the post-earthquake geological disaster, and the closer the acquired value is to 1, the more likely the evaluation point is to have the post-earthquake geological disaster. By means of the method, the accuracy of an evaluation of the susceptibility to the post-earthquake secondary geological disasters is improved.

Description

technical field [0001] The present invention relates to the technical field of geological information processing, and more specifically, to a method and system for rapid assessment of post-earthquake secondary geological disaster susceptibility. Background technique [0002] The existing post-earthquake secondary geological hazard susceptibility assessment methods can be divided into three categories: qualitative methods, semi-quantitative methods and quantitative methods. Qualitative methods are mainly based on the experience accumulation of experts or field judgments, and give the evaluation results of geological disaster susceptibility in single or regional areas. This type of method relies entirely on expert experience and is too subjective. Due to the limitation of knowledge, the objectivity of the evaluation results is relatively poor, and the accuracy is not high; the semi-quantitative method is based on expert knowledge to determine the segmental assignment of geolog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/18G06Q10/06G06Q50/00
CPCG06F17/18G06Q10/06393G06Q50/00
Inventor 陈玉王钦军魏永明
Owner INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI
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