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-  2009 

黄土丘陵沟壑区坡面产流能力及影响因素研究

DOI: 10.11821/yj2009030003

Keywords: 黄土丘陵沟壑区,降雨类型,坡面,径流系数,尺度效应

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Abstract:

摘要: 坡面是黄土高原土壤侵蚀的重要来源,本文以团山沟流域的7个径流场9年的降雨-径流事件,对不同坡面和降雨特征下径流系数随坡面的变化进行了研究。结果表明,研究区存在降雨强度大、持续时间短的A型雨、降雨强度小持续时间长的C型雨以及居于二者之间的B型雨。不同雨型下坡面产流能力大小为A型雨>B型雨>C型雨,而产流尺度效应则为C型雨>B型雨>A型雨。坡度一定,A型雨下随着坡面长度增加产流能力先增加后减小,径流系数峰值出现在坡长为40m的坡面上,B型和C型雨坡面产流能力随坡面长度的增加而增加;坡长一定,峁坡区坡面产流能力随着坡度的增加而增加;A型雨下沟坡产流能力最小,而在B型和C型雨下,坡面产流能力相对有所提高。

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