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湘西武陵山区位于湖南省西北部,地处东经108°47′～113°33′、北纬27°5′～30°9′之间,地域上包括湘西自治州10县市,麻阳、慈利县的全部和石门、桃源、沅陵、辰溪、怀化、芒江、新晃等县的部分地区,面积4.41万km~2,占全省面积的20％。历史上,武陵山区曾是林茂草丰、鸟语花香、山青水秀的地方,被誉为“世外桃源”。近代却由于滥伐穷樵,植被覆盖率下降,导致了严重的土壤侵蚀。 一、土壤侵蚀的特征 (一)山高、坡陡、土薄,土壤侵蚀演替快 本区位于全国人地貌二级台阶的边缘,新构造运动强烈,第四纪期间的间歇性斜掀上升和河流下切,形成了由西北向东南
Wulingshan Mountain lies in the northwestern part of Hunan Province. It lies between 108 ° 47 ’~ 113 ° 33’ east longitude and 27 ° 5 ’~ 30 ° 9’ north latitude. The area includes 10 counties in western Hunan Autonomous Prefecture, Mayang, Cili And some parts of Shimen, Taoyuan, Yuanling, Chenxi, Huaihua, Mangjiang and Ssangyong counties, with an area of 41,400 km2, accounting for 20% of the province’s area. Historically, Wuling Mountain was Lin Mao Cao abundance, birds of paradise, Shanqingshuixiu place, known as “paradise.” In modern times, due to the deforestation and poor quality of trees, the coverage of vegetation decreased, leading to serious soil erosion. First, the characteristics of soil erosion (a) high mountain, steep slopes, thin soil, soil erosion and rapid succession The area is located in the edge of the second step of the national landscape, the Neotectonic movement is strong, Quaternary Period intermittent ramp lift and River cut, formed from northwest to southeast