摘要
In the period of 1989~1995,observations were carried out in the unsaturated zone above the depth of 4 m in a field of water balance with lysimeters in Urab,Xinjiang.The results show that the amount of condensed recharge was significantly depended on the specific surface of media and hydraulic conductivity.The best period for condensed water formation in the unsaturated zone in an arid desert was from April to September.The account of groundwater resources is more than 3×1010m3/a in volume in Northwest China,which maybe greater than the infiltration of precipitation.Thus the condensed water formed in the unsaturated zone can be the crucial recharge resources in certain arid areas.