Indoor batch measuring device and method of soil saturated hydraulic conductivity

Abstract

The invention relates to an indoor batch measuring device and method of soil saturated hydraulic conductivity. The device comprises a Markov bottle, the Markov bottle is provided with an air inlet pipe, the top of the air inlet pipe extends to the upper side of the Markov bottle, the Markov bottle is provided with a water outlet of a water separating device, the water separating device is connected with a corresponding number of cutting rings through a plurality of branch water pipes a funnel is arranged below each cutting ring, a beaker is arranged below the funnel, and the beaker is placed on a balance. The method comprises the steps of: filling the Markov bottle with water, adjusting the lower end of the air inlet pipe to be 5cm higher than the surface of an inner soil layer of the cutting ring, opening a total water inlet valve at the lower part of the Markov bottle, adjusting the pressure difference, closing a water stop clamp after the internal and external pressures of the Markov bottle are balanced, pouring water of 5cm water head in a measuring cup into the cutting ring, opening the water stop clamp at the same time, until the 5cm water head is maintained above all test soil samples, collecting the 5cm water head in a water collecting tank, collecting the 5cm water head with the beaker after the seepage is stable, starting to record data, and finally calculating the soil saturated hydraulic conductivity by using a saturated hydraulic conductivity calculation formula. Multiple samples can be measured at the same time, thereby saving the time.

Description

technical field [0001] The invention relates to an indoor batch measurement device and method for soil saturated hydraulic conductivity, belonging to the technical field of farmland water conservancy engineering. Background technique [0002] Soil saturated hydraulic conductivity is an important soil physical parameter, which can reflect the hydraulic conductivity and infiltration rate of saturated soil. Its accurate measurement is of great significance for understanding soil water infiltration characteristics and guiding agricultural irrigation. Soil saturated hydraulic conductivity refers to the infiltration water flow through the saturated soil per unit cross-sectional area under the unit water potential gradient. and other factors. The determination of saturated hydraulic conductivity is usually carried out indoors, and the ring knife method is often used for determination. During the measurement, the original soil sample was taken with a ring knife. After the original...

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Problems solved by technology

[0003] The ring knife method is a simple and easy method to measure soil hydraulic conductivity, but the existing device design is too simple, and each Martens jar can only correspond to one ring knife, which is time-consuming and laborious

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