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降雨条件下坡地水分转化特征实验研究
李裕元; 邵明安
Source Publication水利学报
2004
Issue4Pages:48-53
Keyword降雨实验 入渗率 降雨强度 坡地 土壤水分转化
Abstract坡地水分转化规律研究对于探讨坡地水土流失以及坡地养分迁移规律具有重要意义。本文以黄绵土为试验材料,通过模拟降雨试验,研究了不同雨强条件下坡面入渗过程与产流特征。结果表明:(1)在地表坡度15°、土壤容重1 28~1 30g cm3的条件下,坡面平均入渗率(ia)与降雨强度(iR)具有极显著的抛物线函数关系,当iR=1 35mm min时,ia具有最大值(1 01mm min);初始产流时间(tp)随iR的增大而减小,二者呈幂函数关系。(2)坡面产流以后,入渗率(i)随降雨历时(t)呈幂函数形式降低,坡面产流强度(VR)随t的延长呈对数函数形式增加。(3)随着雨强的增大降雨的入渗量略有增加,但降雨向土壤水分的转化率则显著降低。
Language中文
Document TypeCNKI期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/16723
Collection历年回溯文献
Recommended Citation
GB/T 7714
李裕元,邵明安. 降雨条件下坡地水分转化特征实验研究. 2004.
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