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坡度和降雨强度对坡耕地入渗的影响
引用本文:卫喜国,严昌荣,魏永霞,李娜,陆永玲.坡度和降雨强度对坡耕地入渗的影响[J].灌溉排水学报,2009(4).
作者姓名:卫喜国  严昌荣  魏永霞  李娜  陆永玲
作者单位:东北农业大学水利与建筑学院;中国农业科学院农业环境与发展研究所;
基金项目:国家科技支撑计划项目(2006BAD29B01、2007BAD88B01);;黑龙江省重点科技攻关项目(GB06B106-3);;东北农业大学“十一五”科技创新团队项目(CXT003-2-3)
摘    要:利用人工模拟降雨对黑龙江西部半干旱区坡耕地不同坡度和不同降雨强度下的土壤水分入渗规律进行了试验研究,采用产流历时和稳定入渗速率二项指标进行分析,发现随着地面坡度的增大,产流历时提前,稳定入渗速率逐渐减小,坡面产流历时与坡度呈对数函数关系,土壤稳渗速率与坡度呈幂函数关系;随着降雨强度的增大,产流历时提前,稳定入渗速率逐渐增大;坡面产流历时与降雨强度呈指数函数关系,土壤稳定入渗速率与降雨强度也呈指数关系。

关 键 词:黑龙江西部半干旱区  坡耕地  降雨强度  坡度  产流历时  稳定入渗速率

Influence of Slope Gradient and Rainfall Intensity on Infiltration in Sloping Farm Land
WEI Xi-guo,YAN Chang-rong,WEI Yong-xia,LI Na,LU Yong-ling.Influence of Slope Gradient and Rainfall Intensity on Infiltration in Sloping Farm Land[J].Journal of Irrigation and Drainage,2009(4).
Authors:WEI Xi-guo  YAN Chang-rong  WEI Yong-xia  LI Na  LU Yong-ling
Institution:1.Water and Civil Engineering College of Northeast Agricultural University;Harbin 150030;China;2.Institute of Agricultural Environment and Development;Chinese Academy of Agricultural Sciences;Beijing 100081;China
Abstract:The infiltration regularity in sloping farm-land in the west semiarid region Heilongjiang province was studied by means of artificial rainfall method under different slope gradient and different rain intensity condition.Using the two indexes of runoff starting time and steady infiltration rate,the infiltration features of the soil were analyzed.The results show that runoff starting times were earlier and the steady infiltration rates decreased with the land-slopes increasing;there was a logarithm function r...
Keywords:the west semiarid region Heilongjiang province  sloping farm-land  rainfall  slope gradient  runoff starting time  steady infiltration rate  
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