Quantification method of soil scour parameters of river bank considering the influence of tamarisk root system

Abstract

The invention discloses a method for quantifying the scouring parameters of riverbank soil considering the influence of tamarisk root system, comprising: the first step, using a glass water tank as the test tank, and setting a trapezoidal test section in the glass water tank; the second step, the test section The scouring test without tamarisk root system coverage was carried out in the test section, and the numerical relationship between the priming shear stress and the erosion coefficient was fitted; in the third step, the scouring test with tamarisk root system was carried out in the test section, and the priming shear stress and root system Numerical relationship between density and dry density, as well as the numerical relationship between erosion coefficient and root density and dry density; the fourth step is to calculate the starting shear stress of the section according to the numerical relationship between starting shear stress and root density and dry density; Step 5: Calculate the scour coefficient of the section according to the numerical relationship between the scour coefficient and the root density and dry density. Introducing the influence of tamarisk root system into the quantification of soil scour parameters of the river bank can obtain more accurate quantitative indicators.

Description

technical field [0001] The invention belongs to the technical field of quantification of scouring parameters of river bank soil, and in particular relates to a quantification method of scouring parameters of river bank soil considering the influence of tamarisk root system. Background technique [0002] Under the action of water flow, the soil is easily scoured, especially on river banks, lake banks and other bank slopes. In the Tarim River Basin in Xinjiang, the typical desert vegetation with red willow as the main body is decreasing, and the erosion of the coastal soil is relatively serious. Through field investigation and research, it is found that the riverbank soil with vegetation root system is not easy to be washed by water. Vegetation roots interpenetrate and entangle the soil, which enhances the anti-shock ability of the soil, weakens the degree of dispersion between soil particles, and makes it difficult for the soil to start under the action of water flow. The ma...

AI Technical Summary

Problems solved by technology

However, there is no specific quantitative index of the starting shear stress and erosion coefficient of the river bank soil under the joint action of the vegetation root system and the soil, nor does it consider the influence of the tamarisk root system on the river bank erosion parameters.

Images