Gully debris flow simulation experiment system and method for determining gully debris flow starting flow amount threshold value

Abstract

The invention discloses a gully debris flow simulation experiment system and a method for determining the gully debris flow starting flow amount threshold value. The experiment system comprises a water pump, a water outlet pipe, a water tank, a waste material collecting pool and a hydraulic lifting mechanism. The method for determining the gully debris flow starting flow amount threshold value includes the steps of (1) measuring all parameters of an actual gully, (2) selecting sediment materials, (3) spreading the sediment in the water tank after the sediment is saturated with water, (4) controlling the gradient of the water tank to be consistent with that of the gulley bed of the actual gully, (5) introducing water into the water tank and enabling the sediment materials to start and flow into the waste material collecting pool, (6) measuring the density of outrush mudflow and obtaining the water flow depth when the debris flow starts, (7) calculating the debris flow starting flow amount of the simulation experiment according to the formula that Qm=vmhmbm, and (8) working out the gully debris flow starting flow amount threshold value according to the formula shown in the specification. According to the gully debris flow simulation experiment system and the method for determining the gully debris flow starting flow amount threshold value, calculation of the gully debris flow starting flow amount threshold value is realized, the calculation result is quite close to the actual data, and the gully debris flow simulation experiment system and the method are quite suitable for application and popularization.

Description

technical field [0001] The invention relates to the field of natural science and technology, in particular to a ditch debris flow simulation experiment system and a method for determining the starting flow threshold of ditch debris flow. Background technique [0002] Debris flow, as a catastrophic event, is a major natural disaster that affects the economic development of mountainous areas and the safety of people's lives and properties. It seriously threatens the development of the national economy and the sustainable development of society. As an important means of disaster reduction, debris flow early warning has been widely concerned by disaster reduction scientific and technological workers and relevant government management departments. Among them, the water flow or flow threshold required in the trench when debris flow starts has always been a key parameter to determine the accuracy of debris flow early warning. At present, domestic and foreign methods for determining...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a ditch debris flow simulation experiment system and a method for determining the starting flow threshold of ditch debris flow, mainly to solve the problem that it is difficult to accurately determine the starting flow threshold of ditch debris flow in the prior art

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