Thin sheet flow simulating device

A technology of thin-layer water flow and water flow, which is applied in the direction of measuring devices, flow characteristics, and weighing by removing certain components, can solve the problem of scientifically exploring the mechanism of action of thin-layer water flow chemicals and covering the role of soil and chemicals and other issues to achieve the effects of eliminating the impact of rainfall, reliable scouring, and avoiding excessive scouring

Inactive Publication Date: 2010-12-29
HUNAN AGRICULTURAL UNIV
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Problems solved by technology

In the course of the research, many influencing factors are involved in the migration of soil nutrients with the surface thin-layer water flow under rainfall conditions, and the rainfall characteristics themselves are complex, so the interference of rainfall factors can easily cover up the effect of the surface thin-layer water flow on the slope soil and chemicals , and it is impossible to scientifically explore the mechanism of action of thin-layer water flow on surface soil chemicals

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specific Embodiment

[0020] The simulated thin-layer water flow device of the present invention is used. The test soil was collected from the surface soil of the sloping farmland in the Dongting Lake Basin, which belongs to the Quaternary red soil. Its mechanical particle composition is 44.95% with a particle size of less than 0.001mm, 3.58% with a particle size greater than 0.05mm, and a particle size between 0.001mm and 0.05mm Between 51.47%. The test soil was collected and air-dried naturally, and then passed through soil sieves with apertures of 5mm and 2mm respectively; the prepared potassium bromide solution of a certain concentration was evenly sprayed on the fine soil passed through the sieve with apertures of 2mm, and fully stirred for later use. Before soil tank 1 is filled with soil, spread permeable gauze on the bottom of soil tank 1 to ensure sufficient water permeability and air permeability of the soil, so as not to increase the water infiltration resistance; Layers of soil are fil...

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Abstract

The invention discloses a thin sheet flow simulating device. A fixed end is arranged at one end of a soil box (1); a lifting end is arranged at the other end of the soil box (1); a perforated plate is arranged at the bottom of the soil box (1); the circumference of the soil box (1) comprises a transparent material; a water outlet (4) is arranged at the fixed end of the soil box (1); a slope adjusting system is arranged at the bottom of the lifting end of the soil box (1); and a flow energy dissipation simple facility (5) is arranged at the upper part of the lifting end of the soil box (1). The device can simulate the thin sheet flow under the conditions with different parameters of quantity of flow, flow rate, slope and the like. By simulating the thin sheet flow by adopting runoff from upslope, the rainfall influence is eliminated, and the mechanism of action of different flow characteristics and hydraulic elements of the thin sheet flow on leaching, release and migration of soil nutrients of a slope can be researched and observed, thereby providing a reference for revealing the migration mechanism of soil solute of the thin sheet flow under a rainfall condition.

Description

technical field [0001] The invention relates to a device for simulating thin-layer water flow, which can simulate thin-layer water flow conditions under multiple different parameter conditions such as flow rate, flow velocity and slope. Background technique [0002] The migration of sloping soil nutrients with surface runoff is a complex physical and chemical process. This process not only involves agricultural problems such as efficient use of agricultural fertilizers and soil quality degradation, but also environmental problems such as water pollution. The research on the mechanism of slope soil and chemical migration with surface water flow has always been a hot topic of domestic and foreign scholars. In the course of the research, many influencing factors are involved in the migration of soil nutrients with the surface thin-layer water flow under rainfall conditions, and the rainfall characteristics themselves are complex, so the interference of rainfall factors can easi...

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Application Information

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IPC IPC(8): G01N33/24G01N11/00G01N5/04
Inventor 王辉吴凤平平李娜姜慧
Owner HUNAN AGRICULTURAL UNIV
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