Simulation experiment table for multi-flow-direction and flow distribution algorithm of slope water current

Abstract

The invention discloses a simulation experiment table for a multi-flow-direction and flow distribution algorithm of a slope water current. The simulation experiment table comprises a square experiment table top, an adjusting device and a current collection trough, wherein the adjusting device is fixed below the experiment table top and comprises three telescopic supports used for supporting the experiment table top; the experiment table top is connected with the adjusting device through spherical hinges, the current collection trough is distributed in the periphery of the experiment table top in a surrounding mode, and the experiment table top and the current collection trough are of an integrated structure; the lengths of the three supports can be changed, and the supports are used for adjusting the experiment table top to be at a required direction angle; a soil layer with the thickness ranging from 10 cm to 15 cm is laid on the surface of the experiment table top, and vegetation distribution and stripe trends are simulated on the soil layer. Corners of the current collection trough are respectively provided with two drain holes. The simulation experiment table is simple in structure, low in manufacturing cost, easy and convenient to operated, capable of obtaining accurate experiment results, high in efficiency, and capable of being used for accurately simulating multiple flow directions of the slope water current in a drainage basin and simulating the situation of actual flow distribution in each flow direction.

Description

technical field [0001] The invention relates to a simulated experimental platform for water flow direction and flow distribution algorithm on a slope, belonging to the technical field of watershed hydrological process simulation. Background technique [0002] Slope surface water flow is usually formed by rainfall or snowmelt water flow. It is a thin-layer multi-flow flow that flows along the surface of the slope under the action of gravity. It is produced when rainfall or snowmelt exceeds the soil infiltration and ground subsidence storage capacity. The flow direction of overland flow in a watershed is generally not single. Due to the complex and changeable surface of the actual watershed slope, the determination of the water flow direction on the slope and the distribution of runoff in different flow directions are the key technical links in the simulation of the hydrological process of the watershed. [0003] At present, when the distributed hydrological model simulates sl...

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Problems solved by technology

[0037] Studies have shown that the calculation results of the multi-flow direction method are more accurate than the single-flow direction method. At present, the multi-flow direction algorithm based on DEM grid data has become the main algorithm for calculating the runoff flow direction and flow distribution of the grid unit on the slope surface of the watershed, but so far it has not been seen. Some scholars have verified this algorithm through experiments

[0038] This is because the existing simulation experiments are generally carried out in water tanks. No matter how the water tanks are laid to simulate different ground surfaces, they cannot overcome the shortcomings of the water tanks in simulating slope flow, that is, the water flow in the tank has a single direction and cannot simulate multiple The slope flow of the flow direction, so the flow direction simulation distortion exists in the flume experiment, and it is not known to what extent the experimental results obtained can describe the slope flow of the multi-flow direction

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