Device and method for quantitatively distinguishing slice flow erosion amount and rill erosion amount of slope surface

Abstract

The invention provides a device and a method for quantitatively distinguishing slice flow erosion amount and rill erosion amount of a slope surface. More than one soil tank is arranged on a test platform for filling soil, the soil tank is parallel to each other and is composed of two lateral plates with a certain distance, the distance between the two lateral plates forms the width of the soil tank, and at the top ends of the two lateral plates, an upper baffle is arranged; a flow collecting barrel is arranged at the lower end of each soil tank; the water spraying head is connected with a water spraying pipeline with a control device, and water with certain pressure is input into the water spraying pipeline and sprayed into the soil tank through the water spraying head. Water is sprayed into the soil slope surface of the soil tank to simulate the scouring of rainfall to the soil slope surface in the soil tank, so that the critical slope length of conversion from slope surface sheet flow erosion to rill erosion can be effectively positioned; the manufacturing process is simple, and the use and measurement method is convenient; the disturbance on the water flow section in the sampling process is eliminated, and the accuracy in the soil erosion amount measuring process is improved.

Description

technical field [0001] The invention relates to the technical field of soil erosion measurement, in particular to a device and a method for quantitatively distinguishing the amount of sheet flow erosion on a slope surface and the amount of rill erosion. Background technique [0002] The slope is the main source of soil loss, and the soil erosion caused by the slope gradually develops and evolves with time and space. As the length of the slope increases, the rainfall sheet flow converges, and when a certain slope length is reached, the sheet flow gradually forms a concentrated water flow. Under the action of concentrated water flow, soil erosion increased sharply, and small channels gradually formed on the eroded slope, and the erosion process gradually evolved from sheet erosion to rill erosion. Rill erosion is the key erosion process that develops from sheet erosion to gully erosion. The formation of rills marks the change of the main erosion mode on the slope, and the ero...

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Problems solved by technology

[0007] The present invention is directed at the above-mentioned deficiencies of the prior art, and the purpose of the invention is to provide a kind of device and method thereof that quantitatively distinguishes the amount of erosion of slope surface sheet flow and rill erosion; Section disturbance is bigger, the shortcoming of inaccurate measurement result, provide a kind of device that can distinguish the amount of erosion of slope surface sheet flow and rill erosion through experiment; The second is to quantitatively distinguish the amount of erosion of slope surface sheet flow and rill erosion method

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