The Loesss Plateau is characterized by crisscross gullies. The developing degree, erosion type and distribution characteristics of gullies are influenced strongly by the height of erosion base level, the amount and intensity of rainfall, and the composition of ground materials in the basin. The gully density (Y) on the Loess Plateau has direct effects on erosion quantity (X). Their relation can be expressed as Y=2.4223+1.083X (r=0.7437) on the Loess Plateau the sediment comes mainly from gullies. The ratio of sediment yield coming from gullies to that from interfluves is nearly 6:4. If the hillslope runoff is intercepted, the sediment yield from gully erosion may reduce by 70%. The key factors reducing gully erosion are to increase the vegetation coverage on hillslopes and to lower the erosion base level.
[1] 陈永宗:黄河中游黄土丘陵地区坡地的侵蚀发育,《地理集刊》,第10期,科学出版社,1976年。
[2] Е.Ф. Зорина:Расчетные методы оредлеиня потенциала овражной эрозии,эрозия почв и русловые прочессы,выпуск 7,издательство Моского университета,1979.
[3] 龚时旸、熊贵枢:黄河泥沙来源和地区分布,《人民黄河》,第一期,1979年.
[4] 曾伯庆:晋西离石王家沟流域综合治理及效益,《人民黄河》,第四期,1980年。
[5] 景可:黄土高原的新构造运动对侵蚀影响的研究,《水土保持通报》,第2期,1982年。
