Numerical value simulation and numerical value calculation method for overall process of debris flow

Abstract

The invention relates to a numerical value simulation and numerical value calculation method for an overall process of debris flow. By researching on a debris flow formation process and mechanism, debris flow channel material starting, and a debris flow movement accumulating process numerical value calculation method, and by constructing a debris flow dynamic process and an engineering regulation and control numerical value simulation platform at the same time, the scientificity and reliability of the research on the dynamic process of the debris flow can be improved, so that technological support is supplied for debris flow disaster alleviation and better service is supplied for the debris flow disaster alleviation; dynamic characteristic of debris flow slurry and big stones are taken into full consideration in a proposed debris flow movement model; a concept of interchange rate of materials of debris flow and a movable bed is introduced initially; and corrosion of debris flow along the way and disaster scale change are taken into consideration to form the debris flow formation-movement-accumulation numerical value simulation and numerical value calculation method based on the overall process. By adoption of the numerical value simulation and numerical value calculation method, the scientificity and reliability of the research on the dynamic process of the debris flow can be improved, so that technological support is supplied for debris flow disaster alleviation and better service is supplied for the debris flow disaster alleviation.

Description

technical field [0001] The invention relates to the technical field of environmental treatment, in particular to a numerical simulation and numerical calculation method for the whole process of debris flow. Background technique [0002] Debris flow is a natural disaster widely distributed in mountainous areas. It erupts suddenly, moves fast, and has a huge impact. The large amount of sand and stones it carries can not only silt farmland, forests, villages and towns in an instant, but also destroy bridge piers. , housing, roadbed, and will directly enter river reservoirs, causing barrier lakes or raising river beds, causing greater secondary disasters, seriously threatening water conservancy and hydropower projects, causing outburst floods in the downstream, and destroying the ecological environment of mountainous areas. Debris flow disasters have become an urgent problem to be solved in the current disaster prevention and mitigation work, especially facing the severe challen...

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Problems solved by technology

[0013] Although many numerical simulation softwares have been applied, these softwares mainly simulate a single process in the "formation-operation-accumulation" of debris flow, and most of the models are based on the assumption of constant flow, which does not apply to the actual natural channels. There are few studies on the evolution process of unsteady debris flow movement with drastic changes in burst, flow rate, flow velocity, and sediment concentration, and it is impossible to accurately describe the dynamic mechanism of the coupling response relationship b

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