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Kinetic wave infiltration method capable of describing preferential flow phenomenon quantitatively

A quantitative description and preferential flow technology, applied in the field of soil hydrology, can solve the problems of ineffective description of preferential flow phenomenon, overly generalized soil water simulation, etc.

Active Publication Date: 2019-05-03
HOHAI UNIV
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Problems solved by technology

[0004] In order to solve the deficiencies of the prior art, the present invention proposes a kinematic wave infiltration method that can quantitatively describe the phenomenon of preferential flow, and solves the technical problem that the soil water simulation in the prior art is too generalized and cannot effectively describe the phenomenon of preferential flow

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  • Kinetic wave infiltration method capable of describing preferential flow phenomenon quantitatively
  • Kinetic wave infiltration method capable of describing preferential flow phenomenon quantitatively
  • Kinetic wave infiltration method capable of describing preferential flow phenomenon quantitatively

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Embodiment Construction

[0060] The present invention will be further described below in conjunction with the drawings and specific embodiments. The following embodiments are only used to illustrate the technical solutions of the present invention more clearly, and cannot be used to limit the protection scope of the present invention.

[0061] The present invention will be further explained below in conjunction with examples.

[0062] According to the method of the present invention, the calculation method of the infiltration method is as follows:

[0063] (1) Place a double-ring infiltration meter in the study area, put a bright blue dye tracer in the two mugs to ensure that the water level of the inner and outer ring is stable, and read the change of the mug dye every minute, according to Darcy's law Calculate Kon p =230mm / h;

[0064] (2) After the dye is completely infiltrated, equilibrate for 15 minutes, excavate the soil section, take a photo to record the dyeing range of the dye, and obtain the average...

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Abstract

The invention discloses a kinetic wave infiltration method capable of describing a preferential flow phenomenon quantitatively, and belongs to the field of soil hydrology. According to the method, a soil moisture profile is divided into a preferential flow area and a matrix flow area, and an infiltration model in which the preferential flow area and the matrix flow area makes bidirectional coupling via the free water surface is provided according to a kinetic wave infiltration theory. The method can reflect wetting front change and soil moisture mutual feedback between the preferential flow and matrix flow, the problem that a present infiltration method is hard to describe the preferential flow phenomenon quantitatively is solved, and the method has high engineering significance.

Description

Technical field [0001] The invention relates to a motion wave infiltration method capable of quantitatively describing preferential flow phenomena, and belongs to the field of soil hydrology. Background technique [0002] Preferential flow refers to the phenomenon of rapid passing through the soil through gaps, wormholes, plant roots, etc., bypassing the soil matrix. Priority flows are widespread in nature and have important effects on soil hydrological processes and ecological environment. However, due to its complex movement laws, it does not follow the laws of soil water movement described by Darcy's law, so it is difficult to simulate the preferential flow. [0003] At present, the understanding of the phenomenon of preferential flow mainly rests on the conceptual description, such as fast infiltration rate and low resistance, but lack of simulation of its infiltration process. General infiltration theories such as kinematic wave infiltration theory treat soil water movement ...

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Application Information

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IPC IPC(8): G01N15/08
Inventor 梁忠民李大洋周艳李彬权付宇鹏杨钊华
Owner HOHAI UNIV
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