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林业科学 ›› 1995, Vol. 31 ›› Issue (1): 35-43.

• 论文及研究报告 • 上一篇    下一篇

长江上游部分地区土壤侵蚀规律的研究*

雷孝章   

  1. 四川省林业科学研究院 成都 610081
  • 收稿日期:1993-06-14 出版日期:1995-01-25 发布日期:1995-01-25

STUDY ON SOIL EROSION PATTERNS IN THE UPPER REACHES OF THE YANGTZE RIVER

Xiaozhang Lei   

  1. Forestry Academy OF Sichuan Province, Chengdu 610087
  • Received:1993-06-14 Online:1995-01-25 Published:1995-01-25

摘要:

通过调查、定位与半定位观测,研究了长江上游不同地貌类型区的土壤侵蚀空间分布格局,以及各影响因子与土壤侵蚀间的关系。揭示了泥沙运行机制和水土流失规律、提出了小流域泥沙运输的输移比:流域面积小于5km2用0.6-0.7作为泥沙输移比,流域面积小于30km2用0, 3作为泥沙输移比.推算流域水土流失量,并建立了坡面和小流域土壤流失预报模型。

关键词: 土壤侵蚀, 输移比, 预报模型

Abstract:

The patterns of spatial distribution of soil erosion and its relations with environmental factors in a range of topographical types in the upper reaches of the Yangtze River were studied through general survey and the establish- ment of permanent and temporary plots. The mechanism of silt transfer and principles of soil erosion were described and the ratios of silt transfer of watersheds were determined, 0.6-0.7 for the watersheds with an area smaller than 5 km2 and 0.3 for those smaller than 30 km2. Quantitative models to predict soil erosion in the slopes and watersheds were also established.

Key words: Soil erosions, Silt transfer ratio, Predicting model