Debris flow real-time dynamic risk evaluation method

A real-time dynamic and evaluation method technology, applied in the direction of instrument, design optimization/simulation, calculation, etc., can solve the problems of static evaluation research without comprehensive consideration of the risk of debris flow source distribution, and achieve a comprehensive effect of identification

Active Publication Date: 2020-06-09
INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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  • Application Information

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Problems solved by technology

[0013] In order to solve the problems existing in the prior art, the present invention provides a method for assessing the dynamic risk of debris flow, which solves the problem that the previous methods did not fully consider the source distribution of debris flow and focused more on the static evaluation research of the risk of debris flow

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  • Debris flow real-time dynamic risk evaluation method

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Embodiment Construction

[0058] Below in conjunction with accompanying drawing, take the Bayi ditch debris flow in Wenchuan earthquake-stricken area as example, the specific embodiment of the present invention is described in further detail, so that those skilled in the art can understand the present invention. It should be understood, however, that the invention is not limited in scope to specific embodiments. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected. List.

[0059] 1. Dynamic stability analysis of the slope

[0060] This part needs to determine the hydrological parameters, physical and mechanical properties parameters and soil layer thickness and other parameters of the rock and soil mass. The determination process of each parameter is as follows:

[...

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Abstract

The invention discloses a debris flow real-time dynamic risk evaluation method, which comprises the following steps of S1, inputting rainfall data and rock-soil body parameters into a TRIGRS model, calculating a stability coefficient Fs of a slope under different rainfall durations, judging that Fs is less than 1 as a source region, and judging that Fs is greater than or equal to 1 as a non-sourceregion; S2, inputting Fs and other evaluation factor layers such as confluence cumulant, gradient, plane curvature and lithology into the Flow-R model at the same time, identifying distribution of potential material source regions of the debris flow slope surface under different rainfall durations, and realizing coupling of the TRIGRS and the Flow-R model; meanwhile, based on field field investigation and remote sensing interpretation, distribution of existing loose matter source areas in the debris flow channel is recognized; and S3, based on a Flow-R model, calculating debris flow energy and risk probability distribution under different rainfall durations, and performing debris flow real-time dynamic risk zoning; according to the method, the problems that debris flow source distributionis not comprehensively considered and static evaluation and research of debris flow risk are emphasized in multiple aspects in the prior art are solved.

Description

technical field [0001] The invention relates to the field of debris flow risk assessment methods, in particular to a real-time dynamic risk assessment method for debris flows. Background technique [0002] A large number of mountain disasters such as collapses and landslides caused by earthquakes can provide rich sources for the formation of debris flows, greatly reduce the disaster-causing conditions of debris flows, and lead to a significant increase in their scale and frequency. For example, in Qingping Township, Mianzhu City, Sichuan Province, stimulated by the local heavy rain on August 13, 2010 after the Wenchuan Earthquake, debris flows occurred in 11 ditches at the same time, forming a 3.5km long, 400-500m wide, average thickness of about 5m, total Square about 600×104m 3 The accumulation area covers an area of ​​about 120×104m 2 , causing 379 houses to be damaged, more than 6,000 people suffered from different degrees of disasters, and the direct economic loss amo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/28G06F113/08
Inventor 李秀珍聂银瓶徐瑞池姚杰
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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