地理科学 ›› 1986, Vol. 6 ›› Issue (4): 340-347.doi: 10.13249/j.cnki.sgs.1986.04.340

• 论文 • 上一篇    下一篇

黄土高原沟谷侵蚀研究

景可   

  1. 中国科学院地理研究所 北京
  • 出版日期:1986-07-20 发布日期:1986-07-20

A STUDY ON GULLY EROSION ON THE LOESS PLATEAU

Jing Ke   

  1. Iustitute of Geography, Academia Sinica, Beijing
  • Online:1986-07-20 Published:1986-07-20

摘要: 黄土高原的形态特征之一是沟谷纵横。沟谷的发育程度和分布特征受区域侵蚀基准高度、降雨量和降雨强度、地表组成物等因素控制。黄土高原沟谷密度的大小直接影响侵蚀量。沟谷与沟间地产沙比接近6:4。增加坡面复盖度,降低侵蚀基准高度是减少沟谷侵蚀的关键。

Abstract: 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.