Artificial rainfall simulationprecipitation emulation method applied tofor debris flow test

Abstract

The invention discloses an artificial rainfall simulationprecipitation emulation method applied tofor a debris flow test. The artificial rainfall simulationprecipitation emulation method is characterized in that: the magnitude of the pressure in a water tank can be adjusted conveniently and flexibly, corresponding pressure is set according to a region underlying surface condition and a rainfallprecipitation feature in order to control a rainfallprecipitation type; a region point heavy rainfall concentration phenomena is emulated simulated by adjusting internal pressure inside distribution boxes, a rainfallprecipitation process in with strong wind can be emulated simulated by turning off one or more distribution boxes; rainstorm types xan also be simulated by overlapping rainfall regions; by inputting rainfall data through a computer system, and controlling a pressure control valve by a controller, the rainfallprecipitation types can be controlled accurately and rapidly. By adopting theartificial rainfall simulationprecipitation emulation method, solid particles and flotation plants in a river can be filtered well through a the pressure control valve, energy saving and environmentfriendliness are achieved, and the service life of a sprayer is 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 and a simulation method 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 prev...

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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