Washout district of original-state in-situ gully system

Abstract

The invention discloses a washout district of an original-state in-situ gully system, which comprises a steady-flow pond, a water storage tank, a catch-water basin, a falling sill, a gully bed, a gully bed buffer area, a water-sand collecting tank, a split-flow pond and a mass flow pond which are sequentially connected from top to bottom along a gradient, wherein the steady-flow pond is connected with the water storage tank through a water duct; the catch-water basin is rectangular, and the width of the falling sill is consistent with the width of the catch-water basin; the upper part of the gully bed of a gully is connected with the bottom of the falling sill, and the gully bed buffer area is connected with the water-sand collecting tank; a water draining port of the water-sand collecting tank is connected with the split-flow pond through the water duct; and a water draining port of the split-flow pond is connected with the mass flow pond through the water duct. As the gully washout district built by a method of the invention mainly adopts an original-state in-situ mode, disturbed soil is less, and the washout district has a good economical efficiency. The overall developmental process of the gully can be continuously, systematically and accurately observed, so the washout district has stronger scientificity. The device has a simple structure and convenience for operation and maintenance.

Description

technical field [0001] The technology of the invention relates to the field of environmental monitoring, in particular to the structure of a gully system scouring area for studying the gully development process, and is used for studying the morphological evolution and sediment effect in the gully development process. Background technique [0002] Gully erosion is a major erosion. According to the survey of the United States Department of Agriculture, the amount of gully erosion accounts for 18-73% (average is 35%) of the total amount of erosion; summarizing and analyzing the situation of gully erosion in various countries in the world, the amount of gully erosion accounts for 10-94% of the total amount of erosion (average is 35%) 44%); in the hilly and gully areas of the Loess Plateau in my country, the area is 217,600 km 2 , The amount of gully erosion accounts for 60-90% of the total erosion. Therefore, it is essential to study gully erosion, among which the development p...

AI Technical Summary

Problems solved by technology

[0003] At present, methods such as remote sensing imagery, photography and GPS are usually used in the field for regular monitoring of the gully development process. These methods have the following shortcomings: 1) it usually takes a long time to obtain, 2) the accuracy of the obtained results is poor, In particular, there is almost no information on the development process. 3) It is impossible to monitor the shape of the gully head and gully wall in the process of gully source erosion.

Quantitative tests are mainly carried out indoors using artificial rainfall. However, the scale of the indoor test is too small, and the soil is not undisturbed, which is far from the actual situation.

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