GIS-based slope collapse distribution statistical method

A technology of distribution statistics and statistical areas, applied in computing, special data processing applications, instruments, etc., can solve problems such as inability to directly cross-comparison, different meanings, quantitative comparison of values, etc., to avoid manual errors, reduce workload, and improve The effect of statistical efficiency

Active Publication Date: 2017-04-26
GUANGZHOU INST OF GEOGRAPHY GUANGDONG ACAD OF SCI
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Problems solved by technology

These confusions led to scholars’ research conclusions to be consistent, such as the number of collapse hills in the south slope is more than that in the north slope (Shen Jia’an 1987, Yao Qingyin 1989, Liu Ruihua 2004, Chen Zhibiao et al. 2006, Ding Guangmin 2001, Ruan Fushui 2003, Fang Yunyun 2014, Lin Jinglan 2014), sunny slopes are more than shady slopes (Shen Jiaan 1987, provincial scientific research team 1991, Ding Guangmin 2001, Ruan Fushui 2003, Lin Jinglan 2014); the area of ​​collapsed hills is more on the south slope than on the north slope (provincial scientific research team 1991, Liu Ruihua 2004, Fang Yunyun 2014), there are more sunny slopes than shady slopes (Guangdong Provincial Scientific Expedition Team 1991), but the meanings are very different, so they cannot be directly cross-compared, and the values ​​cannot be quantitatively compared; some scholars (Liu Xilin et al. Versatility and applicability

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  • GIS-based slope collapse distribution statistical method
  • GIS-based slope collapse distribution statistical method
  • GIS-based slope collapse distribution statistical method

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Embodiment Construction

[0020] Wuhua County, Guangdong is located in the northeast of Guangdong, on the upper reaches of the Han River, and is the most densely distributed area of ​​collapsed hills in the country; Youtian Town is located in the middle east of Wuhua County, bordering Shuikou Town, Xingning City. North latitude 23°51′39″-23°58′37″, east longitude 115°48′48″-115°55′16″, the total land area of ​​the town is 85.6km 2 , the soil parent material is mainly deep granite weathering.

[0021] The statistical process of the present invention will be further described below by taking Youtian Town, Wuhua County, Guangdong Province as the area to be counted.

[0022] Step s101, obtain the 1:10,000 topographic map (1978) of Youtian Town, Wuhua County, Meizhou City, Guangdong Province, and use ArcGIS software to correct and register the topographic map, so that the element coordinates in the topographic map are consistent with the actual coordinates. Ensures the accuracy of feature locations during ...

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Abstract

The invention discloses a GIS-based slope collapse distribution statistical method. A unified slope division standard is determined in advance, a contour line and a collapse range within a to-be-counted area are digitalized, the number and the area of each slope collapse within the area are counted by using GIS software, compared with the manual statistical method, the workload is reduced, the statistical efficiency is improved, artificial errors are avoided, and a foundation is laid for the control of collapse erosion.

Description

technical field [0001] The invention relates to the technical field of soil erosion and geological disaster prevention and control, in particular to a GIS-based statistical method for the distribution of collapsing hillocks in various slopes. Background technique [0002] Benggang is an extremely serious type of soil erosion that commonly exists in the hilly areas of southern my country. It is a special landform type formed by the combined action of hydraulic power and gravity. A large amount of sediment produced by the erosion of collapsing hills will bury fertile fields and block river courses, posing a serious threat to the life safety of downstream people and their production activities, and causing huge economic losses. Benggang in my country is mainly distributed in seven provinces (regions) including Hubei, Hunan, Anhui, Jiangxi, Fujian, Guangdong, and Guangxi. In 2005, the Ministry of Water Resources made a unified deployment, and the provinces sent experts to condu...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 温美丽杨宪杰何小武杨龙陈燕乔
Owner GUANGZHOU INST OF GEOGRAPHY GUANGDONG ACAD OF SCI
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