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一、流域概况 中洞小流域是广东省德庆县大蛹河的一条支流,流域贯串官圩镇民生管理区、新圩镇中洞管理区和德城镇登云管理区,面积45273亩,其中山地32874亩,占总面积的72.6％;耕地4604亩,占总面积的10％(水田面积3826亩,旱地778亩);其他用地7795亩,占总面积的17.4％。全流域有695户,3651人,1308个劳力,人均耕地1.26亩,人均山地9亩。流域内多为花岗岩风化发育而成的赤红壤,土层深厚,
First, the basin profile Cave small watershed in Deqing County, Guangdong Province, a large tributary of the pupal River, Guanxian Guanxian Minsheng Guanxian management area, Xinxu Town Cave Management District and Decheng Dengmian management area, an area of 45273 mu, of which 32874 acres of mountains, accounting for 72.6% of the total area; 4604 acres of arable land, accounting for 10% of the total area (paddy field area of 3826 acres, 778 acres of dry land); other land 7795 acres, accounting for 17.4% of the total area. The basin has 695 households, 3651 people, 1308 labors, 1.26 acres of arable land per capita, per capita mountain 9 acres. Basin mostly for the weathering of granite developed red soil, deep soil,