Removable slope-varying testing device for observing overland runoff and stratified interflow

Abstract

The invention discloses a removable slope-varying testing device for observing overland runoff and stratified interflow. The removable slope-varying testing device is composed of a box body which soilis filled into, an overland runoff guiding component, a stratified interflow guiding system and a removable base and gradient lifting system component, wherein the box body which the soil is filled into is a cuboid tank body made of steel; the overland runoff guiding component is a Y-shaped overland runoff collecting tank; the stratified interflow guiding system comprises a partition layer, a stratified stainless steel waterproof stopping plate, an inserting groove, a PYC porous plate with holes, a gravel filtering layer and an interflow guiding pipe; the removable base and gradient lifting system comprises a base, polyester tires and a hydraulic lifting system. The removable slope-varying testing device disclosed by the invention has the characteristics of simple structure, convenient operation, low cost, ability to accurately separate overland runoff from interflows of all soil layers in a rainfall test process and guide the overland runoff and the interflows out, application to researching water and soil loss and stratified transportation rules of runoff under the manual simulation rainfall condition, and the removable slope-varying testing device has the advantages of better popularization and application prospect.

Description

technical field [0001] The invention belongs to the fields of soil and water conservation and slope hydrology, and relates to a movable slope-changing test device for observing surface runoff and flow in layered soil. Background technique [0002] Surface runoff and soil runoff are important components of slope rainfall-runoff, and are carriers of soil erosion and nutrient loss on slopes. The southern red soil area is very prone to soil midflow due to the characteristics of full runoff storage and soil stratification. When the soil is saturated, the soil moisture on the slope will flow from the soil with high infiltration to the soil interface with low infiltration and the impermeable layer. At the interface, water tends to accumulate and form soil flow that moves laterally. The formation of surface runoff and soil inflow not only changes soil water distribution, but even carries a large amount of non-point source pollutants. Therefore, the study of surface runoff and flow...

AI Technical Summary

Problems solved by technology

At present, there is no good test device for distinguishing different stratified runoff at home and abroad, so it is necessary to develop a mobile variable slope test device for observing surface runoff and stratified soil flow

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