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A Kinetic Wave Infiltration Method for Quantitatively Describing Preferential Flow Phenomena

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: 2021-03-02
HOHAI UNIV
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  • Application Information

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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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  • A Kinetic Wave Infiltration Method for Quantitatively Describing Preferential Flow Phenomena
  • A Kinetic Wave Infiltration Method for Quantitatively Describing Preferential Flow Phenomena
  • A Kinetic Wave Infiltration Method for Quantitatively Describing Preferential Flow Phenomena

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Embodiment Construction

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

[0061] Below in conjunction with example the present invention will be further described.

[0062] Existing southern certain hillside that vegetation covers is better, according to the method of the present invention, the computing method of this infiltration method is as follows:

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

[0064] (2) After the dyeing agent has completely infiltrated, equilibrate for 15 minute...

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Abstract

The invention discloses a kinematic wave infiltration method capable of quantitatively describing preferential flow phenomena, and belongs to the field of soil hydrology. In this method, the soil moisture profile is divided into the preferential flow region and the matrix flow region, and an infiltration model is proposed in which the preferential flow region and the matrix flow region are bidirectionally coupled through the free water surface according to the kinetic wave infiltration theory. The infiltration method provided by the invention can reflect the change of wetting front and the mutual feed of soil moisture between preferential flow and matrix flow, solves the problem that it is difficult to quantitatively describe the phenomenon of preferential flow in the current infiltration method, and has strong engineering significance.

Description

technical field [0001] The invention relates to a kinematic 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 passage through the soil by bypassing the soil matrix through channels such as voids, wormholes, and plant roots. Preferential flow exists widely in nature and has an important impact on soil hydrological processes and ecological environment. However, it is difficult to simulate the preferential flow because of its complex movement law and does not follow the soil water movement law described by Darcy's law. [0003] At present, the understanding of the preferential flow phenomenon mainly stays in the conceptual description, such as fast infiltration speed and low resistance, etc., but there is a lack of simulation of its infiltration process. General infiltration theories such as kinematic wave infil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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