declining of ground water level

• 水位下降

declining of ground water level的用法和样例：

例句

1. Ground water levels fall,rivers get drier and drier.
   地下水位下降，河流越来越干涸。
2. But in recent years, a shortage of rain has decreased the water level in Lake Mead.
   但是最近几年里，由于雨水短缺导致该湖水位下降。