Drip type soil infiltration measuring device

Abstract

The invention discloses a drip type soil infiltration measuring device which comprises a water supplying device, a water drop generating device, a water-collecting measuring device and a bracket system. According to the drip type soil infiltration measuring device, by using a method of drip at a certain height, water drops beat a soil surface to cause that soil generates crust, soil particles absorb water to expand and fill in holes, and soil aggregates are crushed to fill large holes; through regulating different water heads, the speed of drip is controlled, the change similar to waterfall intensity is simulated, different rainfall pattern characteristics are reflected; water collection can be discharged, and thin-layer hydrops exist on the soil surface so that an infiltration environment is close to an infiltration environment under a rainfall condition; the soil infiltration measurement is suitable for laboratory operation, and is closer to soil infiltration under the natural rainfall condition in comparison with a conventional fixed water head laboratory method, and the cost is lower and the simplicity is achieved in operation.

Description

technical field [0001] The invention relates to the technical field of farmland water balance and soil and water conservation observation, in particular to a drip-type soil infiltration measuring device. Background technique [0002] Soil water infiltration is the physical phenomenon of water infiltrating into the soil, expressed by the infiltration depth per unit time, that is, the infiltration intensity or infiltration rate, or expressed by the cumulative infiltration curve over time. Soil water infiltration is closely related to the entry of precipitation and irrigation water into the soil and its storage in the soil. When the infiltration rate is low, the water infiltrated into the soil is low, resulting in stagnant water and waterlogging; or the water that is too late to infiltrate flows away along the surface and takes away the soil, causing problems such as water and soil erosion. When the infiltration rate is too high, it may not be conducive to soil water retention...

AI Technical Summary

Problems solved by technology

Due to the large difference between these experimental methods and natural precipitation, especially the impact of raindrops on the soil surface during natural rainfall, the displacement of fine soil particles caused by raindrop splashing, soil crusting, and soil aggregate destruction, the impact of fine soil particles on large Gap filling and other processes are lacking; problems such as boundary effects caused by the damage to the soil surface during the installation of the instrument lead to a large difference between the measured values ​​​​of these methods and the infiltration of natural precipitation

The method of artificially simulating rainfall to measure soil infiltration can better solve the problem of changing the state of the soil surface by raindrops, but it requires expensive and complex artificial rainfall simulation equipment, and for small soil columns, the uniformity of rainfall This will lead to the difficulty of determining the simulated precipitation received by the soil column, which will affect the measurement accuracy

If you increase the soil column area, it will increase the workload

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