文献类型： 外文期刊

第一作者： Yu, B

作者： Yu, B;Sajjapongse, A;Yin, D;Eusof, Z;Anecksamphant, C;Rose, CW;Cakurs, U

作者机构：

关键词： soil erodibility;bare plots

期刊名称：AUSTRALIAN JOURNAL OF SOIL RESEARCH （ 影响因子：3.443； 五年影响因子：2.179 ）

ISSN： 0004-9573

年卷期： 1999 年 37 卷 1 期

页码：

收录情况： SCI

摘要： Runoff rates were estimated from rainfall rates and runoff amounts for 4 experimental sites in China, Malaysia, and Thailand before a physically based erosion model GUEST was used to determine the soil erodibility parameter and evaluate the potential to use the erosion model to predict the amount of soil loss on an event basis. We also examined 3 different ways of determining the soil erodibility parameter for the same storm event using: (i) hydrographs estimated from rainfall intensities and runoff amounts; (ii) an effective runoff rate calculated from the hydrograph; (iii) an estimate of the effective runoff rate based on a scaling technique involving the peak rainfall intensity and the gross runoff coefficient. All 3 methods can produce consistent soil erodibility parameters for a given runoff event. The calculated soil erodibility for individual storm events for all sites shows considerable temporal variation and for most sites a decreasing trend over time, as observed elsewhere in the same region. Among the 4 soils examined, the average soil erodibility tends to decrease as the ratio of coarse to fine materials decreases. When the erosion model GUEST is used to predict event soil loss using estimated soil erodibility parameters, an average model efficiency of 0.68 is achieved for the sites tested.

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