Experimental approach and seepage apparatus for seepage-dome flow coupled erosion process

Abstract

Provided is a experimental technique in the seepage-overland flow coupling erosion process of the water and soil conservation experimental technique and a seepage device thereof, wherein the technique includes the following steps of applying the grade constant head and the sectional type water supplying method according to the seepage control theory on the basis of the traditional overland flow erosion experiment technology, adding the device which can provide and control the seepage, to cause the steady seepage present on the dome, wherein the overland flow supplies water to the earth (infiltration) or the water in the earth supplies water to the overland flow (exfiltration) when performing the overland flow corrosion test by water discharge. In the overland flow corrosion test, the overland flow is the same all about on the dome, and the seepage is steady, even, and can be described according to the observation data, which realizes the effective simulation in the seepage-overland flow coupling erosion process, and quantitatively studies the effect rule and the mechanism of action in the overland flow erosion process, wherein the experimental result preferably matches with the overland flow real condition of the seepage. The invention can be widely applied in the overland flow erosion process of the seepage. The invention has simple implementation and convenient operation.

Description

technical field [0001] The invention belongs to the field of soil and water conservation research, and relates to a soil erosion experiment method and an experiment device for providing stable seepage. Background technique [0002] Slope flow erosion refers to the phenomenon that the soil is stripped away when the erosive force of the water flow on the slope is greater than the anti-erosion ability of the soil. Slope flow erosion is one of the most common forms of soil erosion. Whether it is sloping farmland, beaches, river banks, or soil slopes in various projects, when precipitation or tidal water level drop on the slope surface forms a large area of ​​slope flow, it will cause erosion to the slope surface. It is estimated that topsoil resources worldwide are decreasing at a rate of 0.7% per year. More than 70% of sandy coasts in my country are in a state of retreat due to beach slope erosion, and 66% of cultivated land is distributed in mountains, hills, In plateau areas...

AI Technical Summary

Problems solved by technology

However, since this type of experiment is difficult to quantitatively describe seepage (such as the seepage gradient reflecting the effect of seepage on the stress state of the soil), the experimental results cannot reveal the mechanism of seepage on slope flow erosion, so it cannot serve slope erosion. forecast

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