广东省水土流失重点防治区划分

doi:10.16843/j.sswc.2018.06.015

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Abstract [Background] The division of key prevention and control region for water and soil erosion in Guangdong province, can specified the key prevention and control points for water loss and soil erosion, and provide the basis for compiling water and soil conservation planning and water loss and soil erosion subregion prevention,also can guide the work of water and soil conservation planning at all levels in Guangdong province.[Methods] This paper took town-level administrative region as the basic division unit, through use GIS technology, combined with the unique natural conditions of Guangdong province,such as the characteristics of heavy rainfall and concentration and soil resistance to erosion is poor, according to relevant laws & regulations, planning and main function division of Guangdong province,at the same time analysis characteristics of soil and water loss control of Guangdong province, combine with quantitative analysis methods and qualitative analysis methods, put forward the quantitative index of the key prevention area of soil erosion, such as the ratio of light and micro area of soil and water loss, the ratio of the soil erosion potential danger area,vegetation coverage of forest and grass and so on. also put forward the quantitative index of key control region of soil erosion, such as soil erosion intensity, the ratio of the slope disintegration erosion region, cultivated land area, the ratio of the cultivated land in slope cropland and so on. Combined with qualitative analysis, structure the index system of division of key prevention and control region of soil erosion, and then divided into key control region of soil and water loss of Guangdong province.[Results] The results show that within the Guangdong province, delineated two provincial key prevention region,the name is the key prevention region of soil erosion of upper reaches of Moyang River and the key prevention region of soil erosion of upper and middle reaches of North River, the total area of the delineation region is 23 613.52 km² which accounting for 13.13% of the whole province. as well as delineated three provincial key control region, and the name is the key control region of soil erosion upper and middle reaches of Jian River, the key control region of soil erosion upper and middle reaches of Rong River and the key control region of soil erosion lower reaches of West River, the total area of the delineation region is 8 211.79 km² which accounting for 4.57% of the whole Guangdong province.[Conclusions] The results of the division of key prevention and control region of soil and water loss in Guangdong province made the key management of soil erosion more operational and convenient for meticulous management, also provides an important basis for implementing the responsibility assessment and reward and punishment system of soil and water conservation objectives at all levels of government.

Key words： water and soil erosion key prevention region key control region Guangdong province

Received: 24 May 2018

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S157.1

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	Articles by authors
	YAO Chengping
	ZHANG Xiaoyuan
	ZHENG Guoquan
	YANG Xianjie
	LI Jiansheng

Cite this article:

YAO Chengping,ZHANG Xiaoyuan,ZHENG Guoquan, et al. Zoning of key prevention and control region of water and soil erosion in Guangdong province[J]. SSWC, 2018, 16(6): 118-123.

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http://journal12.magtechjournal.com/Jweb_stbc/EN/10.16843/j.sswc.2018.06.015 OR http://journal12.magtechjournal.com/Jweb_stbc/EN/Y2018/V16/I6/118

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