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Soil erosion calculation oriented method and system for improving rainfall erosion force factor

A technology of rainfall erosivity and soil erosion, applied in soil material testing, material inspection products, etc., can solve problems such as 30min maximum rainfall intensity error

Inactive Publication Date: 2018-11-27
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the 3h average rainfall intensity is directly used instead of the 30min maximum rainfall intensity. Although the relative daily average rainfall intensity is closer to the 30min maximum rainfall intensity, there is a large error with the 30min maximum rainfall intensity.

Method used

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  • Soil erosion calculation oriented method and system for improving rainfall erosion force factor
  • Soil erosion calculation oriented method and system for improving rainfall erosion force factor
  • Soil erosion calculation oriented method and system for improving rainfall erosion force factor

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Effect test

Embodiment 1

[0047] Such as figure 1 , 2 As shown, step 100 is executed, and the information acquisition module 200 obtains the maximum rain intensity information. The maximum rain intensity information includes the maximum rain intensity in 30 minutes, the maximum rain intensity in 1 hour, the maximum rain intensity in 3 hours, the maximum rain intensity in 6 hours, and the maximum rain intensity in 12 hours. Strong and 24-hour maximum rain intensity.

[0048] Execution of step 110, the data conversion module 210 converts the obtained maximum rain intensity information into 30 minutes maximum rain intensity, and the calculation formula is 1 30 = aI 60 =bI 180 =cI 360 =dI 720 =eI 1440 , among them, I 60 is the maximum rain intensity in one hour, I 180 is the maximum rain intensity in 3 hours, I 360 is the maximum rain intensity in 6 hours, I 720 is the maximum rain intensity in 12 hours, I 1440 is the maximum rain intensity in 24 hours, and a, b, c, d, e are constants. The cons...

Embodiment 2

[0059] Soil erosion refers to the process of soil or soil parent material being destroyed, denuded, transported and deposited under the action of external forces (water, wind). The process of soil erosion is actually the process of simultaneous loss of water, that is, the process of soil erosion, and the two are basically the same. It is the result of the combined effect of natural and human factors. Nowadays, soil erosion has become one of the major environmental problems that are widely concerned in the world. It aggravates natural disasters such as siltation, drought, and floods, causes land productivity to decline, and seriously threatens the survival and development of human beings. Soil erosion forecasting is a means to effectively monitor water and soil loss and evaluate the benefits of soil and water conservation measures, and erosion model is an important tool for soil loss monitoring and forecasting. However, traditional prediction methods require a lot of money, ti...

Embodiment 3

[0090] The revised universal soil loss equation RUSLE (Universal Soil Loss Equation, USLE) was launched by the US Department of Agriculture in 1997. The model takes into account the comprehensive factors such as rainfall, soil erodibility, topography, vegetation and management, and soil and water conservation. It is still the most widely used soil erosion model at present. Its mathematical expression is as follows:

[0091] A=R×K×LS×C×P

[0092] Among them, A is the annual soil loss; R is the rainfall erosivity factor; K is the soil erodibility factor; LS is the product of slope length factor and slope factor; C is the vegetation and management factor; P is the factor of soil and water conservation measures product. The dimensional units of R and K are the same as the general water and soil loss equations in the United States, and LS, C and P are dimensionless units.

[0093] Using the Model Builder module of ArcGIS software, the calculation models of each soil erosion fact...

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Abstract

The invention provides a soil erosion calculation oriented method and system for improving a rainfall erosion force factor. The method comprises a step of acquiring the highest rainfall intensity information and further comprises the following steps: converting the obtained highest rainfall intensity information into a 30-minute strongest rainfall intensity; calculating an erosion force of a rainfall event; calculating an annual rainfall erosion force; and calculating an average rainfall erosion force of several years. According to the soil erosion calculation oriented method and system for improving the rainfall erosion force factor provided by the invention, an improved calculating method for the rainfall erosion force factor is further provided on the basis of a RUSLE model rainfall erosion force calculating method; the converting relation between the highest rainfall intensities of the rainfall events with different rainfall duration under the conditions of different rainfall duration and rainfall types is considered, so that the accuracy of the rainfall erosion force calculation is effectively increased.

Description

technical field [0001] The invention relates to the technical field of digital image processing, in particular to a method and system for improving rainfall erosivity factors for soil erosion calculation. Background technique [0002] Soil erosion refers to the process of soil or soil parent material being destroyed, denuded, transported and deposited under the action of external forces (water, wind). The process of soil erosion is actually the process of simultaneous loss of water, that is, the process of soil erosion, and the two are basically the same. It is the result of the combined effect of natural and human factors. Nowadays, soil erosion has become one of the major environmental problems that are widely concerned in the world. It aggravates natural disasters such as siltation, drought, and floods, causes land productivity to decline, and seriously threatens the survival and development of human beings. Soil erosion forecasting is a means to effectively monitor wat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 黄诗峰臧文斌付意成朱鹤杨永民孙亚勇马建威李景刚辛景峰李蓉陈胜朱吉生王慧高思远祝鹏
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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