Post-earthquake debris flow early recognition method

An early identification and debris flow technology, applied in the early identification field of post-earthquake debris flow, can solve the problems of not being able to identify post-earthquake debris flow disasters, not taking into account the characteristics of source changes, and not being able to monitor and prevent post-earthquake debris flow disasters, etc.

Active Publication Date: 2019-07-09
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The debris flow geological disaster identification method based on remote sensing satellite images disclosed in this patent document, although terrain factors are taken into account, fails to combine the source of debris flow and hydraulic conditions well, and the source of debris has large uncertainties. The characteristics of the debris

Method used

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  • Post-earthquake debris flow early recognition method

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Embodiment 1

[0033] An early identification method for post-earthquake debris flow, comprising the following steps:

[0034] a. After accurately interpreting the provenance of remote sensing images, determine the evaluation factors, and grade the evaluation factors through the spatial analysis function of the geographic information system. According to the selected evaluation factors, count the area occupied by each evaluation factor under different classifications, and select the evidence The weight method is used to calculate the prior probability P under each classification P(m) and the posterior probability P (m) , the prior probability P P(m) Determined by formula 1, the posterior probability P (m) Determined by formula 2;

[0035] P P(m) =a i / A Formula 1

[0036]

[0037] Among them, P P(m) is the prior probability, which means that the unit area of ​​1km is randomly selected 2 Probability of debris flow occurring above; P (m) is the posterior probability, indicating the...

Embodiment 2

[0045] An early identification method for post-earthquake debris flow, comprising the following steps:

[0046] a. After accurately interpreting the provenance of remote sensing images, determine the evaluation factors, and grade the evaluation factors through the spatial analysis function of the geographic information system. According to the selected evaluation factors, count the area occupied by each evaluation factor under different classifications, and select the evidence The weight method is used to calculate the prior probability P under each classification P(m) and the posterior probability P (m) , the prior probability P P(m) Determined by formula 1, the posterior probability P (m)Determined by formula 2;

[0047] P P(m) =a i / A Formula 1

[0048]

[0049] Among them, P P(m) is the prior probability, which means that the unit area of ​​1km is randomly selected 2 Probability of debris flow occurring above; P (m) is the posterior probability, indicating the ...

Embodiment 3

[0058] An early identification method for post-earthquake debris flow, comprising the following steps:

[0059] a. After accurately interpreting the provenance of remote sensing images, determine the evaluation factors, and grade the evaluation factors through the spatial analysis function of the geographic information system. According to the selected evaluation factors, count the area occupied by each evaluation factor under different classifications, and select the evidence The weight method is used to calculate the prior probability P under each classification P(m) and the posterior probability P (m) , the prior probability P P(m) Determined by formula 1, the posterior probability P (m) Determined by formula 2;

[0060] P P(m) =a i / A Formula 1

[0061]

[0062] Among them, P P(m) is the prior probability, which means that the unit area of ​​1km is randomly selected 2 Probability of debris flow occurring above; P (m) is the posterior probability, indicating the...

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Abstract

The invention discloses a post-earthquake mud-rock flow early recognition method, which belongs to the technical field of mud-rock flow monitoring engineering, and is characterized by comprising the following steps of: a, determining an evaluation factor, and calculating a prior probability PP (m) and a posterior probability P (m) under each classification; b, constructing a regional debris flow susceptibility model through equal-weight superposition calculation; c, constructing a post-earthquake debris flow terrain induction degree model, and predicting the debris flow rushing-out range of each valley; and d, combining the object source sensitivity of the debris flow with the terrain induction degree to construct a post-earthquake debris flow early recognition model. The object source andtopographic conditions of the post-earthquake debris flow basin are considered, the object source sensitivity of the debris flow is introduced into a model, topographic factors are analyzed through alinear regression analysis method, and then an early recognition result of the post-earthquake debris flow is obtained through comprehensive equal weight superposition. The accuracy of debris flow identification in an earthquake area can be effectively improved, and powerful evidence is provided for prediction and prevention of debris flow after the earthquake.

Description

technical field [0001] The invention relates to the technical field of mud-rock flow monitoring engineering, in particular to an early identification method for mud-rock flow after an earthquake. Background technique [0002] Debris flow is a common geological disaster that occurs in mountainous areas. Heavy rains and floods will move fluids along steep slopes under the action of gravity after saturation and dilution of sandy and soft soil mountains. my country is one of the countries that are seriously threatened by debris flow disasters in the world. In order to minimize the losses caused by debris flow disasters, it is necessary to strengthen the research on early identification methods of debris flow. [0003] Throughout the development history of early identification methods of debris flow in my country, before the 1980s, it was mainly limited to the qualitative description of debris flow disaster identification, and the research was still in the initial stage. After t...

Claims

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Application Information

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IPC IPC(8): G06F16/29G06F17/18
CPCG06F17/18Y02A90/10
Inventor 常鸣周宇窦向阳周超秦波
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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