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作 者 ：雷孝章

期 刊 ：林业科学 1995年 31卷 1期 页码：35-43

关键词：土壤侵蚀；输移比；预报模型；

Keywords:Soil erosion, Silt transfer ratio, Predicting model,

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.

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 watershede were also established.

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