Method for monitoring erosion amount and erosion rate of bank slope

Abstract

The invention discloses a method for monitoring the erosion amount and the erosion rate of a bank slope. The method comprises steps as follows: a monitoring datum point of the bank slope is built firstly; the datum point is taken as a datum, multiple section lines are emitted on the monitored bank slope by a total station, each section line is located on a section perpendicular to a river, all sections are parallel, and the distance between adjacent sections is recorded; measure points are emitted on each section line, and the distance between adjacent measure points in the same section line is recorded; the relative elevation of each measure point, relative to the datum point, in all sections is measured by a level gauge; all the measure points are repeatedly measured in the monitoring period; the erosion amount and the erosion rate of the bank slope are calculated according to data. According to the method, permanent monitoring can be performed, the monitoring is not influenced by deformation such as bank slope collapsing, huge rock alluviation and the like, and besides, the monitoring is accurate, simple and convenient.

Description

technical field [0001] The invention belongs to the field of water and soil loss monitoring, and in particular relates to a monitoring method for bank slope erosion amount and erosion rate. Background technique [0002] Taking the Three Gorges Reservoir area as an example, the water level of the Three Gorges Reservoir drops from 175m to 145m every year. After the flood season, the reservoir water rises from 145m to 175m. This is repeated every year, and its hydrological cycle is one year. As the water level fluctuates by 30m, a huge ebb and flow zone is formed on the banks of the reservoir. During the period of high water level of 175m, the reservoir water has the effect of immersing, softening and eroding the deposits on both sides of the bank. The scorching sun caused the weathering and loosening of the surface, coupled with frequent rainstorms, the erosion of the reservoir bank continued to deepen, and finally led to the erosion of a large number of accumulations along th...

AI Technical Summary

Problems solved by technology

Long-term monitoring is not only the continuity of the monitoring work, but also the durability of the monitoring device; if the monitoring device is damaged, it will be difficult to connect most of the previous monitoring data with the monitoring data after the monitoring pile is rebuilt, and eventually form a phased monitoring. That is, there is data in each stage, but the time of each stage is difficult to connect, which is very unfavorable for the analysis of its laws

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