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汾河水库上游地处芦芽山、云中山和吕梁山的山巅之间,包括宁武、静乐、岚县、娄烦四县,总面积5268平方公里。在源头和分水岭处群山环拱,山坡陡立,基岩裸露,坡积黄盎在水蚀作用下只有小片残留,全流域石质山地和土石山地的分布范围约占总面积的40％。为了研究黄土高原土石山区的水土流失特征,我们选定宁武县阳房沟流域作为土石山区的代
The upper reaches of Fenhe Reservoir is located between Luyashan Mountain, Yunzhong Mountain and Luliang Mountain, including the four counties of Ningwu, Jingle, Lanxian and Loufan with a total area of 5268 square kilometers. At the source and at the watershed, there are mountains and valleys, steep hillsides and bare bedrock. Only small pieces remain under the water erosion, and the distribution ranges of the stony and mountainous rocks in the whole basin account for about 40% of the total area. In order to study the characteristics of soil erosion in the rocky mountainous area of Loess Plateau, we selected Yangfanggou catchment in Ningwu County as the representative of the rocky mountain area