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Method for simulating and quantifying influence of composite erosion on water and soil loss

A technology of erosion, simulation and quantification, applied in the direction of measuring devices, weather resistance/light resistance/corrosion resistance, instruments, etc., can solve the problems of inaccurately reflecting the contribution of driving factors, etc., to improve observation accuracy, practical technical solutions, and shorten experiments The effect of the process

Active Publication Date: 2020-08-07
YELLOW RIVER INST OF HYDRAULIC RES YELLOW RIVER CONSERVANCY COMMISSION
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Problems solved by technology

[0006] In order to solve the problem that the independent measurement of the contribution rate of different driving factors in the prior art cannot accurately reflect the contribution of each driving factor in the multiphase erosion system, the present invention provides a method for quantifying the contribution of each driving factor to water and soil loss under the action of composite erosion by using an indoor simulation test. Affected technical solutions

Method used

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  • Method for simulating and quantifying influence of composite erosion on water and soil loss
  • Method for simulating and quantifying influence of composite erosion on water and soil loss
  • Method for simulating and quantifying influence of composite erosion on water and soil loss

Examples

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Embodiment 1

[0026] This example studies the impact of freeze-thaw-wind-hydraulic combined erosion on slope soil and water loss. Specifically include the following steps:

[0027] (1) Slope model making: air-dry the soil sample through a sieve with a diameter of 10 mm to remove weeds and stones, and fill the soil sample into the test soil by filling in layers, compacting in layers, and randomly measuring the bulk density Groove 4, the thickness of each layer of filling soil is about 10cm, and a soil moisture-ground temperature sensor is buried for each layer of filling soil. A total of 5 sensors are buried to measure the soil moisture and ground temperature data of different soil layers, and the soil bulk density is controlled at 1.35 g / cm 3 , making it comparable to the soil bulk density of the study area in the natural state. In order to control the moisture content of the soil in the early stage to be consistent, the day before the test, the soil tank was pre-rained with 30mm / h light ...

Embodiment 2

[0035] This example studies the contribution rate of water power, wind power and freeze-thaw erosion to soil erosion. Specifically include the following steps:

[0036] (1) Make the slope water erosion model: make the same slope model as in Example 1.

[0037] (2) Conduct water erosion test: push the prepared test soil tank 4 into the artificial simulated rainfall system 2 along the track 5, and perform the artificial simulated rainfall test procedure as in Example 1.

[0038] (3) Analysis of water erosion test results: after the test, the collected runoff sediment samples were analyzed, the runoff flow was calculated by the volume method, the sediment yield was calculated by the weighing method, and the runoff sediment concentration was calculated by the drying method. The particle size distribution of sediment was analyzed by laser particle size analyzer; the change characteristics of erosion sediment obtained from this is the influence of the hydraulic erosion process of s...

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Abstract

The invention discloses a method for simulating and quantifying the influence of a composite erosion effect on water and soil loss. That is to say, means like an artificial simulated rainfall test, awind tunnel test and a freeze-thaw cycle test are comprehensively utilized. The filled test soil tank along the track are moved among the regions of the indoor artificial rainfall-wind tunnel-freeze thawing cycle solid model; through combined application of multiple test devices, simulation of different composite erosion modes is achieved, the water and soil loss influence quantity under differentcomposite erosion effects is determined, and the contribution rate of each driving factor such as hydraulic power, wind power and freeze thawing on the water and soil loss influence is separated according to a driving factor dissociation scheme. According to the technical scheme, the method is practical and effective, the water and soil loss influence quantity under different dynamic coupling effects in the composite erosion system can be quantified, and the contribution rate of each driving factor in the composite erosion system can be separated.

Description

technical field [0001] The invention relates to the technical field of soil erosion research. In particular, it relates to a method for simulating and quantifying the influence of combined erosion on water and soil loss. Background technique [0002] Soil erosion is the process in which soil or parent material is destroyed, stripped and transported under the action of internal and external forces such as water force, wind force, gravity, freeze-thaw, etc. This process can be caused by one of the forces, or it may be caused by multiple forces , and the action relationship of various forces is often more complicated, such as compound relationship, alternating relationship, or interactive relationship, thus forming different erosion types, which can be called compound erosion in a broad sense. Combined erosion is often of high intensity and can seriously degrade the ecological environment. It is a key issue in the research of soil and water conservation and ecological governan...

Claims

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Application Information

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IPC IPC(8): G01N17/00
CPCG01N17/00
Inventor 张攀姚文艺肖培青杨春霞孙维营李莉王志慧焦鹏
Owner YELLOW RIVER INST OF HYDRAULIC RES YELLOW RIVER CONSERVANCY COMMISSION
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