层状土壤指流实验研究  

Laboratory study of finger flow in layered soils

作　　者：李怀恩[1] 拦继元 史文娟[1] 张建丰[1] 王智[3] 李贺丽[1] 

机构地区：[1]西安理工大学水利水电学院,陕西西安710048 [2]青海省环境科学研究设计院,青海西宁810007 [3]加利福尼亚州立大学Fresno分校地学与环境科学系

出　　处：《干旱地区农业研究》2007年第6期111-115,共5页Agricultural Research in the Arid Areas

基　　金：陕西省重点实验室访问学者专项计划项目(05JF11);教育部高等学校优秀青年教师教学科研奖励计划项目(2001-282)

摘　　要：为了解层状土条件下指流平均推进速度与上层土壤性状的关系,分别以西北地区三种典型土壤(西峰土、榆林土、新疆沙土)为上层土、粗沙为下层土,在室内进行充分供水条件下层状土壤指流实验。实验结果表明,上层土的饱和导水率决定了下层沙土中指流的平均推进速度,且上层土的饱和导水率与指流平均速度呈线性关系。该结论对指流特征预测具有重要参考意义。The finger flow experiment on layered soils, with three typical soils （Xifeng soil, Yulin soil, Xinjiang sand soil） as upper soils and bulky grain as lower soils, in the condition of sufficient water supply indoors was carried out for the relationship between the rate of finger flow and upper soil characteristics. The results show that, the average rate of finger flow was controlled by the hydraulic conductivity rate of upper soil, and there was a good linear relationship between the hydraulic conductivity rate of upper soil and the average rate of finger flow. This is an important conclusion to the forecast of the finger flow characteristics.

关 键 词：指流 层状土 湿润锋 饱和导水率 

分 类 号：S157.1[农业科学—土壤学]