A Thin Layer Uniform Water and Sand Simulator

Abstract

The invention discloses a thin layer uniform water and sediment simulation device. The thin layer uniform water and sediment simulation device is composed of a stirring system, a fixed water level steady flow case and a thin layer uniform water and sediment bypass channel; a circular stirring barrel of the stirring system is connected with a water and sediment runoff input port formed in the fixed water level steady flow case through a steel wire pipe, one side of the fixed water level steady flow case is provided with overflow holes and overflow hole valves, a fixed water level steady flow case base is arranged under the fixed water level steady flow case, the slope of the case bottom of a constant flow discharge case is provided with a flaky runoff outlet adjusting plate fixed nut and a flaky runoff outlet adjusting plate, a flaky runoff outlet is connected with first-stage bypass channels which are connected with second-stage fans-shaped bypass channels, a first-stage subcritical flow area is located under the second-stage fans-shaped bypass channels, a second-stage subcritical flow area is located under the first-stage subcritical flow area, and a thin layer uniform water and sediment drainage bag is located under the second-stage subcritical flow area. The thin layer uniform water and sediment simulation device has the advantages that flow capacity and sediment concentration can be adjusted as needed, the flow capacity and sediment concentration are uniform, the simulation width can be set as needed, and sediment runoff is uniform on a certain width of simulation equipment.

Description

technical field [0001] The invention belongs to an experimental device in the field of soil erosion and soil and water conservation scientific research, in particular to a thin-layer uniform water and sand simulation device. Background technique [0002] Soil erosion is a major global ecological and environmental problem, and slope farmland is an important source of soil erosion. The water erosion process of slope soil can be decomposed into the damage and dispersion process of soil particles caused by raindrop impact and runoff erosion, and the transport process of soil particles by runoff. In the process of slope water erosion, the runoff formed on the surface usually carries a certain amount of sediment. As the runoff continues to increase, this sandy runoff has a strong ability to erode the soil below it. According to whether the sandy runoff converges into streams, the slope sandy runoff can be divided into thin layer sandy runoff and rill sandy flow. Due to the large...

AI Technical Summary

Problems solved by technology

That is, artificially simulate rainfall in the test area directly to obtain thin-layer sediment-laden runoff; this method can better simulate the runoff erosion caused by rainfall, but the operability is poor, and the runoff and sediment content generated are not uniform, and the runoff and sediment content It is difficult to quantify the amount, and it is not easy to simulate the thin layer of sandy runoff with a large flow rate

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