过量开采地下水资源引起地下水位大幅下降，在地下水面形成区域性漏斗状凹面的现象。
基坑排水形成地下水降落漏斗，诱发岩溶地面塌陷；
Drainage of the foundation pit formed the landing funnel of underground water which induce rocky surface collapse;
本文主要分析了地下水水位变化引起的降落漏斗及地面沉降、水质恶化等环境地质问题。
This paper mainly analyses environmental geological problems such as descend funnel land subsidence. Water quality deterioration produced by groundwater level change.
沧州地区由于地下淡水严重超采，地下水位大幅度下降，形成区域性降落漏斗。
Owing to the severe over-eatraction of the underground fresh water, the groundwater table lowers greatly, forming a regional drawdown funnel.
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