Method for estimating earth's surface roughness coefficient and infiltration parameters of slope under the condition of water flow erosion

A technology of water flow and slope, applied in the direction of calculation, electrical digital data processing, special data processing applications, etc., can solve problems such as difficult to quickly and accurately determine slope surface roughness and infiltration parameters

Inactive Publication Date: 2015-11-25
XIAN UNIV OF TECH
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for estimating slope surface roughness and infiltration parameters under the condition of water flow

Method used

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  • Method for estimating earth's surface roughness coefficient and infiltration parameters of slope under the condition of water flow erosion
  • Method for estimating earth's surface roughness coefficient and infiltration parameters of slope under the condition of water flow erosion
  • Method for estimating earth's surface roughness coefficient and infiltration parameters of slope under the condition of water flow erosion

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Embodiment Construction

[0065] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0066] The method for estimating slope surface roughness and infiltration parameters under the condition of water scour of the present invention is specifically implemented according to the following steps:

[0067] Step 1 Establish the motion wave equation

[0068] According to the water balance relationship under the condition of water scour, the kinetic wave equation is established, and the equation is:

[0069] ∂ h ∂ t + ∂ q ∂ x = - i - - - ( 1 )

[0070] In formula (1), h is the depth of water flow on the slope / m, t is the water su...

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Abstract

The invention discloses a method for estimating earth's surface roughness coefficient and infiltration parameters of a slope under the condition of water flow erosion. The method comprises the steps of establishing a kinematic wave equation, then solving the kinematic wave equation by means of an analytical method to obtain the changing relation with time of slope flow and water depth, and determining the earth's surface roughness coefficient and infiltration parameters according to actually-measured data under the condition of water flow erosion. Compared with an existing trace method for flow speed measurement, the measurement time is shortened, the estimating accuracy is improved, the earth's surface roughness coefficient and infiltration parameters (a, b) can be simultaneously determined under the condition that inflow and outflow are known, and the operation is simple and easy.

Description

technical field [0001] The invention belongs to the technical field of research on slope surface characteristics under the condition of hydrological process analysis and water scour, and in particular relates to a method for estimating slope surface roughness and infiltration parameters under the condition of water scour. Background technique [0002] Surface roughness and infiltration rate are important parameters to describe the hydrological process and determine the hydraulic characteristics. The soil surface roughness and soil infiltration characteristics change under the condition of water flow on the slope surface. For sloping farmland, different land use patterns lead to changes in the underlying soil conditions, which directly affect the amount of surface filling, surface runoff, soil infiltration, slope water flow characteristics, and the process of soil erosion and nutrient migration. In the process of water erosion, surface roughness directly affects the generati...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 王全九杨婷
Owner XIAN UNIV OF TECH
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