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Plane meshing method and risk measurement method of debris flow accumulation fan

A technology of accumulation fan and debris flow, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as affecting the popularization of measurement methods

Inactive Publication Date: 2016-06-08
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

More importantly, since people do not fully understand the mechanism of debris flow, the subjective effect of the application of the Defer analysis method is stronger, which may affect the generalization of the measurement method

Method used

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  • Plane meshing method and risk measurement method of debris flow accumulation fan
  • Plane meshing method and risk measurement method of debris flow accumulation fan
  • Plane meshing method and risk measurement method of debris flow accumulation fan

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Embodiment 1

[0067] like Figure 1 ~ Figure 4 As shown, the danger of debris flow accumulation fan in Maliugou, Longchi Town, Dujiangyan City, Sichuan Province is measured with the method of the present invention. figure 2 It is a schematic diagram of the technical process of this embodiment.

[0068] On August 14, 2010, a debris flow broke out in Maliugou, Longchi Town, Dujiangyan City, Sichuan Province, and buried 3 farm houses and 1 resettlement house in the centralized resettlement area within the range of its accumulation fan. The maximum fluid velocity on the accumulation fan is 6.48m / s, and the maximum accumulation thickness is 5.5m.

[0069] 1. On-the-spot investigation and mapping

[0070] After field investigation and mapping, the basic parameter data are determined: the width of the section width of the Maliugou debris flow ditch b 0 =30m, the maximum rushing distance l of the debris flow accumulation fan m =218m, the maximum accumulation width b of the debris flow accumula...

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Abstract

The invention discloses a method for gridding the plane of a debris flow accumulation fan and a method for measuring the risk of the debris flow accumulation fan. Aiming at the defect that the existing quantitative evaluation method of debris flow accumulation fan risk division is affected by more subjectivity, the present invention firstly provides a plane gridding method of debris flow accumulation fan, which establishes a plane model of accumulation fan on the basis of survey data, And divide the grid unit for the debris flow accumulation fan terrain. Based on the method, the present invention also provides a method for measuring the risk of a debris flow accumulation fan. This method calculates the risk P(ξ) of each grid unit, and determines the risk of debris flow accumulation fan based on the distribution characteristics of the risk P(ξ) of each grid unit on the terrain of the debris flow accumulation fan. The data source of the method of the present invention is obtained by means of investigation, surveying and mapping, etc., and the evaluation result is not affected by subjective factors; the measurement method decomposes the risk degree of the accumulation fan into two components, P(u) and P(h), which can measure silting and impact respectively Dangerous in two aspects, it is more instructive to the practice of debris flow prevention and control projects.

Description

technical field [0001] The invention relates to a method for gridding a plane of a debris flow accumulation fan and a method for measuring the risk of a debris flow accumulation fan based on the method, belonging to the field of prevention and control of debris flow disasters. Background technique [0002] Debris flow accumulation fans are the final product of debris flow activities. In mud-rock flow active areas, people always hope to know in advance whether the place where they live is safe or not, and the degree of damage that may be caused by mud-rock flow flooding. Determining the scope has become one of the most important non-engineering disaster reduction measures in debris flow disaster areas. [0003] The risk division of debris flow accumulation fan is divided according to the comprehensive judgment of various factors affecting the accumulation and flooding of debris flow. At present, the risk assessment methods for debris flow accumulation fans at home and abroa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 唐川乐茂华朱静周伟刘清华常鸣
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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