摘要
水特征曲线测量、水分运移的现场观测以及用3 H作为示踪剂的现场示踪试验被同时用于水分在包气带浅部黄土运移研究之中。研究结果表明 ,在半干旱地区的包气带黄土中 ,土壤浅部水的上下运动明显 ;降水的垂直入渗量甚小 ,最多约为降水量的 1 % ;而且降水的垂直入渗量随深度增加而减小。研究证实 。
Three methods were used in this research. They are water retention curve measurement, field observation of moisture movement and field nuclide migration test used 3H as tracer. It is shown from the results that moisture in shallow unsaturated loess moved obviously down and up as well as was poor in the semi-arid area. The maximum infiltration amount of water was about 1% of precipitation. Moreover, the vertical infiltration amount of precipitation decreased with depth in unsaturated loess. It is validated from the research that the results calculated by the experiential equation were in keeping with the measured ones obtained from the field nuclide migration test very well.
出处
《干旱区研究》
CSCD
2000年第2期1-7,共7页
Arid Zone Research
关键词
半干旱地区
包气带黄土
水特征曲线
水分运移
semi-arid area, unsaturated loess, field nuclide migration test, water retention curve, moisture movement.
