Dynamic process based debris flow dynamic risk analysis system and method

Abstract

The invention provides a dynamic process based debris flow dynamic risk analysis system and method. The method comprises the steps of: establishing a drainage basis model; obtaining spatial and temporal distribution of rainfalls; calculating debris flow characteristic parameters of the drainage basis space; and establishing a risk assessment model for analyzing dynamic risk of the debris flow and outputting a debris flow dynamic risk chart. The dynamic process based debris flow dynamic risk analysis system and method have the beneficial effects that: for considering the current situations and for solving the problems in the current debris flow risk researches, a new method for debris flow dynamic risk analysis based on debris flow dynamic process by considering dynamic boundary conditions is provided; a general framework model is established; a 3D dynamic risk chart can be output by inputting any space debris flow dynamic process and the characteristic parameters (flowing speed, flowing depth, flow process and the like) in various kinds of rainfall processes (at different design frequencies, and under monitoring); and therefore, the dynamic process based debris flow dynamic risk analysis system and method can be widely applied to debris flow monitoring and early warning, design of key parameters of prevention and treatment projects, disaster management and the like.

Description

technical field [0001] The invention relates to the technical field of disaster monitoring, in particular to a dynamic risk analysis system and method for debris flow based on a dynamic process. Background technique [0002] Debris flow is a common geological disaster in mountainous areas. Its outbreak is sudden, ferocious, short-lived, and has strong destructive power. threats and hazards. Scientific, reasonable and effective debris flow risk analysis can provide essential potential disaster information for disaster prevention and reduction work, regional development planning, life and property safety, etc., and guide people to reasonably avoid disaster risks, which is an extremely important field of disaster prevention and reduction. work. [0003] Debris flow risk refers to the expected loss of people's life, property and economic activities caused by debris flow disasters in a certain area and within a given period of time. The general quantitative expression is: [0...

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Problems solved by technology

This qualitative or semi-quantitative method has many problems such as numerous index factors, difficult selection and quantification, complexity and uncertainty of the factor system; more importantly, it does not have a risk assessment model based on the physical process and dynamic mechanism of debris flow. It also lacks physical meaning, and cannot express the dynamic risk problem in a debris flow process

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