黄土新含水层饱水机理的试验研究  

The Research for the Water Saturating Process of the Loess New Aquifer

作　　者：刘俊民[1] 陈艳霞[1] 杨平[1] 

机构地区：[1]西北农林科技大学水利与建筑工程学院,陕西杨凌712100

出　　处：《灌溉排水学报》2006年第4期16-19,共4页Journal of Irrigation and Drainage

基　　金：国家自然基金项目(40271023)

摘　　要：以黄土原状土为研究对象,进行室内饱水试验,利用Diviner2000含水量测定仪,取得第一手资料。根据实验所得数据资料,首先对黄土饱水过程是否完成进行了判断,然后对黄土层不同深度体积含水量、累积饱水量、饱水速率、不同深度处的水力梯度等随时间的变化规律进行分析。经判断,黄土试样达到基本饱和,其饱和含水量为12.3%,小于国内同类研究结果,究其原因在于试样顶部裸露,饱水过程存在蒸发。最后,揭示出黄土层的饱水机理。Taking the original state loess as the object and using the Diviner2000 moisture content goniophotometer, the indoor saturating water experiment was taken. Therefore, the first-hand data were obtained. Acording to the data from the experiment, we carried on a judgment to the loess water saturating process and obtained the rule of the moisture content at different depth, cumulated saturating moisture, velocity of saturating and water power gradient and so on changing with time. After analysis, we got the conclusion that the loess sample had been assembly saturated, and its saturation moisture content was 12.3% which was less than domestic homogeneous findings. The reason lies in that the top of the sample was always exposed in the air, and it had evaporation in process of the loess water saturating. Finally, the mechanism of the loess water saturating is discovered.

关 键 词：黄土新含水层 累积饱水量 饱水速率 水力梯度 饱水机理 

分 类 号：S152[农业科学—土壤学]