Method and device for measuring field slope surface infiltration performance and permeability coefficient

Abstract

The invention discloses a method and a device for measuring field slope surface infiltration performance and a permeability coefficient. A field slope surface double-cycle infiltrator is adopted; and the device comprises a slope infiltration ring (3), a rainfall cylinder (2) and two Marriot water tanks (1), wherein the slope infiltration ring (3) is used for being pressed into field slope surface soil and has a concentric double-ring structure; the rainfall cylinder (2) is used for allowing the rainfall capacity in an inner ring and an outer ring of the slope infiltration ring (3) to be adaptively equal to the saturated deposited water-free infiltration amount and has a concentric double-ring structure; and the two Marriot water tanks (1) are used for supplying water into the double rings of the rainfall cylinder (2). The measurement method disclosed by the invention comprises the following steps: measuring the saturated wet deposited water-free infiltration amount of the slope surface (containing the horizontal surface) and the rainfall capacity thereof, obtaining a relationship between the soil surface zero pressure saturated infiltration and the time, thereby obtaining the rainfall infiltration performance and the saturated permeability coefficient of the soil surface.

Description

technical field [0001] The invention relates to a method and device for measuring permeability coefficient in water conservancy projects, in particular to a method and device for measuring infiltration performance and permeability coefficient of field slope surface. Background technique [0002] The hydraulic conductivity is also called the hydraulic conductivity. In isotropic media, it is defined as the unit flow rate under the unit hydraulic gradient, indicating the difficulty of fluid passing through the pore skeleton. [0003] In hydraulic engineering or geological engineering, it is often necessary to measure the permeability coefficient of the field surface to judge the geological infiltration capacity. There are concentric ring method and artificial rainfall method for measuring field surface infiltration capacity. The concentric ring method presses the concentric ring into the soil layer, treats the soil surface in the ring as a horizontal plane, applies a constant...

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Problems solved by technology

The concentric ring method needs to treat the surface of the soil layer as a horizontal plane, and cannot directly measure the infiltration of natural slopes. The calculation of the permeability coefficient must also be determined by the estimation of the seepage diameter, and it is difficult to calculate accurately; the artificial rainfall method needs to measure the yield It is difficult to accurately measure the production flow in real time, and it is not applicable to the horizontal surface. On the other hand, it is also difficult to determine the infiltration range, and it is also difficult to accurately calculate the permeability coefficient of the soil surface.

[0004] Therefore, for the measurement of the infiltration capacity and permeability coefficient of the field slope surface, there is no better method and device in this field.

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