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Method for rapidly measuring rill erodibility of soil

A rapid measurement and fine groove technology, which is used in soil material testing, material inspection products, etc., to achieve the effect of simple test layout, small test area, and simple and fast measurement.

Inactive Publication Date: 2014-05-07
INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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  • Application Information

AI Technical Summary

Problems solved by technology

Rill erodibility is used to indicate the ability of soil to resist rill runoff erosion. It is a key parameter for quantitative calculation of slope erosion. The existing measurement methods are mainly suitable for indoor conditions and cannot meet the requirements of rapid determination of rill erodibility on natural slopes. erosive needs

Method used

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  • Method for rapidly measuring rill erodibility of soil
  • Method for rapidly measuring rill erodibility of soil
  • Method for rapidly measuring rill erodibility of soil

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Experimental program
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Embodiment 1

[0035] Test site: Wanzhou Ecological Environment Test Station of Chengdu Institute of Mountain Research, Chinese Academy of Sciences, the specific location is Changling Town, Wanzhou District, Chongqing City.

[0036] Specific steps are as follows:

[0037] Step 1: Surface treatment

[0038] Determine the test area, pull out all corn in a corn field with a slope of 10°, and remove the roots. The length of the test area along the slope is 3m and the width is 1.5m. Remove the weeds in the test area, plow 10cm of soil on the ground, and rake it.

[0039] Step two, determination of rill specifications

[0040] As attached figure 1 , 2 As shown, in the test area, 5 rills of the same specification were excavated along the slope. The rill length L was 2m, the rill cross section was U-shaped, the cross section width d was 5cm, and the depth was 5cm. The slopes are parallel, and the distance between adjacent rills is at least 10cm;

[0041] Step three, moisture control

[0042] Excavate the w...

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Abstract

The invention relates to a method for rapidly measuring the rill erodibility of soil. The method comprises the following steps of: selecting a sloping surface serving as a test area; excavating rills of the same specification; performing runoff scouring on the rills respectively; measuring and calculating the flow, erosion rate, flow speed and runoff shearing force of the rills; drawing a scatter diagram by taking the erosion rate of the rills as a value Y and taking the runoff shearing force as a value X; and performing linear fitting, wherein the gradient of a fitting straight line is the erodibility value of the rills. The method is suitable for various different sloping surface conditions, and has low requirement on the test environment; the occupied test area is small; test arranged is simple, and mainly depends on a water supply device; the measurement is simple and rapid, and one measurement can be finished outdoors within several hours; and a measurement result is reliable.

Description

technical field [0001] The invention belongs to the technical field of water and soil conservation, and in particular relates to a method for quickly measuring the erodibility of soil rills. Background technique [0002] Soil erosion is a worldwide ecological environment problem. Soil erosion not only takes away a large amount of fertile soil and causes land degradation, but also brings sediment and pollutants into rivers, lakes and ponds, causing a series of problems such as floods and water pollution. [0003] Slope erosion, especially rill erosion is an important cause of soil erosion. Rill erodibility is used to indicate the ability of soil to resist rill runoff erosion. It is a key parameter for quantitative calculation of slope erosion. The existing measurement methods are mainly suitable for indoor conditions and cannot meet the requirements of rapid determination of rill erodibility on natural slopes. Corrosive needs. Contents of the invention [0004] The pu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24
Inventor 傅斌王玉宽徐佩严坤
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI