Method for estimating raindrop-induced moisture transfer rate and mixed layer depth

A technology of mixed layer and transfer rate, applied in the direction of analyzing materials, measuring devices, instruments, etc., can solve the difficult and convenient and accurate determination of raindrop-induced moisture transfer rate and mixed layer depth and other problems

Pending Publication Date: 2020-04-07
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 the raindrop-induced moisture transfer rate and the depth of the mixed layer, which solves the problem that the existing model is difficult to determine the raindrop-induced moisture transfer rate and the depth of the mixed layer

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  • Method for estimating raindrop-induced moisture transfer rate and mixed layer depth
  • Method for estimating raindrop-induced moisture transfer rate and mixed layer depth
  • Method for estimating raindrop-induced moisture transfer rate and mixed layer depth

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Embodiment Construction

[0077] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0078] A method for estimating the water transfer rate induced by raindrops and the depth of the mixed layer in the present invention first combines the Philip model and the kinematic wave model to solve the time-varying process of flow at the outlet and slope water depth; then further divide the rainfall process into 3 stages , combined with the solute transport model to solve the runoff solute loss rate, combined with the measured solute loss data to calculate the raindrop-induced water transfer rate e r and mixed layer depth d e .

[0079] Step 1: Combining the kinematic wave model and the Philp infiltration model to establish a slope flow movement model under rainfall conditions;

[0080] Step 2: Build a model of solute migration with runoff.

[0081] Step 3: Combined with the measured data (runoff time, outlet flow, NO in runoff 3 -...

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Abstract

The invention discloses a method for estimating raindrop induced moisture transfer rate and mixed layer depth, which comprises the following steps of: establishing a motion wave equation, and solvinga slope runoff motion process; then establishing a runoff and solute concentration change equation in the mixed layer, calculating the raindrop induced moisture transfer rate and the depth of the mixed layer in combination with the loss data of NO3 <->-N in the actually measured runoff, and finally verifying the calculated raindrop induced moisture transfer rate and the depth of the mixed layer byusing the loss data of NH4 < + >-N in the actually measured runoff. The method solves the problem that it is difficult for an existing model to conveniently and accurately determine the raindrop-induced moisture transfer rate and the depth of the mixed layer.

Description

technical field [0001] The invention belongs to the technical field of nutrient loss with surface runoff in the analysis of agricultural hydrological processes, and specifically relates to a method for estimating raindrop-induced water transfer rate and mixed layer depth. Background technique [0002] Under the condition of natural rainfall, the surface runoff of slope farmland will take away a large amount of soil nutrients, which will cause a series of environmental problems such as slope farmland degradation and agricultural non-point source pollution. However, factors such as rainfall intensity, temperature, wind speed, and the temporal and spatial variability of soil structure during natural rainfall have a significant impact on the acquisition of measured data. Therefore, the migration of chemicals during natural rainfall is difficult to quantify in situ. Existing studies have used artificial rainfall tests and water scour tests from above to simulate and observe the ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G01N33/24G06F111/10
CPCG01N33/24G01N2033/245
Inventor 吴军虎邵凡凡
Owner XIAN UNIV OF TECH
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