| 上方来水对坡面降雨入渗及土壤水分再分布的影响 |
| |
| 引用本文： | 陈洪松,邵明安,王克林.上方来水对坡面降雨入渗及土壤水分再分布的影响[J].水科学进展,2005,16(2):233-237. |
| |
| 作者姓名： | 陈洪松 邵明安 王克林 |
| |
| 作者单位： | 1.中国科学院亚热带农业生态研究所, 湖南, 长沙, 410125; |
| |
| 基金项目： | 国家自然科学基金重大研究计划资助项目(90102012)，国家杰出青年科学基金资助项目(40025106)，中国科学院知识创新工程领域前沿项目(01200220055413)~~ |
| |
| 摘 要： | 在防止土壤侵蚀和雨后抑制蒸发的条件下,利用室内模拟降雨试验,研究了上方来水对坡面降雨入渗、湿润锋运移以及土壤水分再分布的影响。结果表明:对于初始含水量很低的土壤,与上方无来水相比,上方来水时降雨入渗过程中入渗率有一个上升的阶段,但平均入渗率反而降低;在降雨入渗初期,由于上方来水的沿程入渗,上方来水对坡面湿润锋运移的影响较大,但随后几乎没有影响,湿润锋的运移主要与基质势梯度有关;土壤水分沿坡面呈"波浪形"分布是坡面径流的波动性、上方来水(径流)的沿程入渗以及侧向沿坡向下流等综合作用的结果。
|
| 关 键 词： | 上方来水 坡面 降雨入渗 土壤水分 再分布 |
| 文章编号： | 1001-6791(2005)02-0233-05 |
| 收稿时间： | 2003-12-05 |
| 修稿时间： | 2003年12月5日 |
Effects of runoff from upslope on rainfall in filtration and soil water redistribution at a planar slope |
| |
| CHEN Hong-song,SHAO Ming-an,WANG Ke-lin.Effects of runoff from upslope on rainfall in filtration and soil water redistribution at a planar slope[J].Advances in Water Science,2005,16(2):233-237. |
| |
| Authors: | CHEN Hong-song SHAO Ming-an WANG Ke-lin |
| |
| Affiliation: | 1.Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China;2.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China;3.Institute of Geographical Science and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China |
| |
| Abstract: | The effects of runoff from upslope on rainfall infiltration,wetting front movement and soil water redistribution are studied based on the simulated rainfall at a planar slope,while soil erosion is prevented during rainfall infiltration and evaporation is stopped during soil water redistribution.The results show that when initial soil water content is very low,the infiltration rate at hillslope with runoff from upslope has an increasing process but the average one decreases,compared with the rainfall infiltration without runoff from upslope.Runoff from upslope has a marked effect on wetting front movement at the beginning of rainfall infiltration due to upslope runoff infiltration,and then has a little effect,which implies that the wetting front movement mostly depends on the matric suction.The wave distribution of soil water along hillslope results from the fluctuation of overland flow,upslope runoff infiltration,and lateral downslope flow. |
| |
| Keywords: | |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《水科学进展》浏览原始摘要信息 |
|
点击此处可从《水科学进展》下载全文 |
|
