Method for calculating suction of infiltration wetting front of soil and spurt volume of rainfall

A technology of rainfall initial loss and calculation method, which is applied in the direction of measuring device, permeability/surface area analysis, suspension and porous material analysis, etc., can solve the problem of limiting model application, inability to determine the Green-Ampt model wetting peak fixed suction parameters, It is difficult to meet the needs of soil parameters and other issues

Inactive Publication Date: 2016-05-04
INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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Problems solved by technology

The Green-Ampt model is a runoff model with a clear physical mechanism, but it is difficult to determine the fixed suction parameters of the wet peak, which severely limits the application of the model
The traditional double-ring infiltration test can onl

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  • Method for calculating suction of infiltration wetting front of soil and spurt volume of rainfall
  • Method for calculating suction of infiltration wetting front of soil and spurt volume of rainfall
  • Method for calculating suction of infiltration wetting front of soil and spurt volume of rainfall

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[0028] Hereinafter, preferred embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Although the drawings show preferred embodiments of the present disclosure, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0029] figure 1 It shows a flowchart of a method for calculating soil infiltration wet peak suction and initial rainfall loss according to an exemplary embodiment, and the method includes the following steps:

[0030] Step 1. Through the double-loop infiltration experiment, measure and record the change of the water supply Q with the infiltration time t, and calculate the real-time cumulative infiltration h according to the f...

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Abstract

The invention provides a method for calculating the suction of infiltration wetting front of soil and the spurt volume of rainfall. The method comprises the following steps: measuring and recording changes of the volume of water supply with infiltration time by using a double-loop infiltration experiment and calculating an infiltration amount accumulated in real time; fitting necessary parameters according to the infiltration time and the infiltration amount accumulated in real time; calculating the suction of the infiltration wetting front based on the fitted parameters and fixed infiltration water head height; calculating saturated hydraulic conductivity of soil based on the fitted parameters, initial water content of soil and soil porosity; and calculating the spurt volume of rainfall on the basis of the suction of the infiltration wetting front, the saturated hydraulic conductivity of soil, rainfall intensity, initial water content of soil and soil porosity.

Description

Technical field [0001] The present disclosure relates to the determination of soil parameters of a hydrological rainfall runoff generation model, and particularly relates to a method for calculating soil infiltration wet peak suction and initial rainfall loss based on double loop infiltration. Background technique [0002] my country is one of the countries with the most frequent storms and floods, and timely and accurate forecasting and warning of flood disasters is very important to reduce disaster losses. One of the key issues in flood disaster forecasting and early warning is to accurately simulate the rainfall runoff process. The Green-Ampt model is a runoff model with a clear physical mechanism. However, it is difficult to determine the fixed suction parameters of the wet peak, which severely limits the application of this model. The traditional double-loop infiltration experiment can only test the saturated hydraulic conductivity of the soil, and cannot determine the fixe...

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Application Information

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IPC IPC(8): G01N15/08
CPCG01N15/0893
Inventor 李军杨默远王中根刘昌明
Owner INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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