An artificial rainfall simulation device for debris flow test

Abstract

The invention discloses an artificial rainfall simulation device for debris flow testing. The pressure of a water tank can be flexibly adjusted conveniently through the device, corresponding pressurecan be set according to the underlying conditions and rainfall characteristics of an area, so as to further control the rainfall type; the concentration phenomenon of area point rainstorm can be simulated through regulating the internal pressure of sub water tanks; through closing one or more of the sub water tanks, and the rainfall process under windy weather can be simulated, and the rainstorm type can be simulated through overlapping the rainfall area; the rainfall data can be input through a computer system, the rainfall type can be accurately and rapidly controlled by controlling a pressure control valve through a controller; and the pressure control valve can be used for well filtering solid particles, phytoplankton and the like in river water, so that the energy conservation and environment protection can be achieved, and the service life of a nozzle can be prolonged.

Description

technical field [0001] The invention relates to the technical field of debris flow start-up tests, in particular to an artificial rainfall simulation device for debris flow tests. Background technique [0002] Debris flow is a solid-liquid two-phase fluid filled with a large amount of sand, stones and boulders. It has the characteristics of sudden outbreak, strong handling impact and silting ability, and has great destructive power. The nature of debris flow determines that its formation requires sufficient water sources. The water source that causes debris flows in my country mainly comes from heavy rain, which manifests itself as a disaster when the rainfall reaches a certain critical rainfall value. Therefore, the determination of critical rainfall is of great significance for studying the formation mechanism of debris flow, analyzing and predicting the characteristics of future activities of debris flow, and guiding the design of debris flow prevention and control proje...

AI Technical Summary

Problems solved by technology

However, through the current situation analysis, there are still some problems and difficulties that need to be further considered and overcome in the current debris flow prediction and forecasting work based on rainfall and rainfall intensity conditions.

Most of the existing debris flow forecasting models are established based on statistical data. Debris flows mostly occur in remote mountainous areas where monitoring data is scarce. The universality of many existing models cannot meet the needs of disaster prevention and mitigation. Debris flow start-up in situ is carried out according to the underlying surface conditions. According to the conditions of the underlying surface, the rainfall threshold for debris flow initiation in each area can be determined. Combining with the experimental phenomena, the characteristics of debris flow initiation, debris flow scale and accumulation characteristics can be analyzed, the disaster-causing ability of debris flows can be analyzed, and the potential impact range can be evaluated. Debris flow start-up model provides basis for future debris flow prediction

The existing artificial rainfall device for debris flow start-up has a relatively simple structure and cannot simulate the impact of regional point rainstorms on the start-up of debris flow, and the rainfall conditions cannot be adjusted. The simulated rainfall and actual rainfall conditions are significantly different, resulting in the distortion of the obtained data. Accuracy cannot meet the needs of disaster prevention and mitigation

[0003] When simulating rainfall in remote areas such as mountainous areas, the water source used is mostly the water in the local river, but the water in the river contains a lot of solid particles and phytoplankton, etc., which are directly used to simulate rainfall, which may easily cause blockage of the sprinkler

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