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Plane meshing method and dangerousness measuring method for 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: 2014-01-22
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • 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 dangerousness measuring method for debris flow accumulation fan
  • Plane meshing method and dangerousness measuring method for debris flow accumulation fan
  • Plane meshing method and dangerousness measuring method for debris flow accumulation fan

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Embodiment 1

[0067] Such as 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 accum...

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Abstract

The invention discloses a plane meshing method and dangerousness measuring method for a debris flow accumulation fan. For the defect that an existing dangerousness degree partition and quantitative evaluation method for the debris flow accumulation fan is mainly influenced by subjectivity, the plane meshing method for the debris flow accumulation fan is firstly provided. According to the plane meshing method for the debris flow accumulation fan, an accumulation fan planar model is built on the basis of data surveying, and the terrain of the debris flow accumulation fan is divided into mesh units. Based on the method, the dangerousness measuring method for the debris flow accumulation fan is further provided. According to the dangerousness measuring method for the debris flow accumulation fan, the dangerousness degree P (xi) of each mesh unit is measured and calculated, and the dangerousness of the debris flow accumulation fan is determined according to the distribution characteristic of the dangerousness degrees P (xi) of the mesh units on the terrain of the debris flow accumulation fan. According to the plane meshing method and the dangerousness measuring method for the debris flow accumulation fan, data are acquired through surveying, mapping and other means, and an evaluation result is not influenced by subjective factors; the measuring method decomposes the dangerousness degree of the accumulation fan into a component P (u) and a component P (h), the dangerousness of burying and the dangerousness of impact can be measured respectively, and debris flow prevention engineering practice is guided better.

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 Applications(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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