Although precipitation in this region is small, supply area is large, evaporation and excretory is concentrate; so change of water level trends of groundwater is not obvious in short term.

• 天然地下水的补给来源有降水入渗补给、凝结水补给和侧向径流补给等,虽湖区内降水量小,但补给区面积大,蒸发排泄集中,从而造成地下水水位动态短期内变化不明显。