Debris flow risk degree evaluation method

Abstract

The invention discloses a debris flow risk degree evaluation method. The method comprises a step of determining the characteristic parameters associated with debris flow three elements, a step of establishing the comprehensive information evaluation system of the three elements, obtaining a three-element initial information evaluation matrix, and calculating the information entropy of the three elements through matrix operation and an entropy method, a step of establishing a debris flow information entropy model, taking three sub information entropy as an input factor, through BP neural network effect, and outputting debris flow information entropy, a step of defining a debris flow risk degree level standard according to the relation between the information entropy theory and the fact whether debris flow occurs, and carrying out risk degree evaluation on a search object. The invention discloses a debris flow probability model, the mutual interaction mechanism of debris flow three elements in a debris flow inoculation process can be comprehensively reflected, the complex nonlinear and dynamic processes of debris flow can be represented, the risk degree of the research object (single channel/regional debris flow) can be forecasted.

Description

technical field [0001] The invention belongs to the field of geological disaster evaluation, and in particular relates to a mud-rock flow risk evaluation method. Background technique [0002] Debris flow is a common geological disaster in mountainous areas. Debris flows are sudden, ferocious, short-lived, and have strong destructive and impact forces. They often silt houses, cultivated land, roads and block rivers, causing serious harm to human life and property. Therefore, the research on the evaluation method of debris flow risk has become particularly important. [0003] The occurrence and scale of debris flow are inseparable from the three major elements of terrain, solid source, and hydrodynamic force. At present, the research methods on the risk of debris flow at home and abroad all select various factors related to the three major elements, obtain their weights through expert scoring or mathematical processing, and algebraically sum the products of each factor and i...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a debris flow risk evaluation method, aiming at solving the problem that the existing evaluation methods of debris flow risk all select the three elements related to each The weight of each factor is obtained through expert scoring or mathematical processing, and the algebraic sum of the products of each factor and its weight is used as an expression of the risk of debris flow, which cannot truly express the probability of debris flow, and cannot comprehensively reflect the three elements in debris flow. Interaction mechanism and non-linear and dynamic process of debris flow during incubation

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