论沧州市自备井关闭对城市地质环境的影响

摘要

Cangzhou is located in the eastern part of the North China Plain, which is a serious resource water shortage areas. Since the 1970s a large number of deep-water exploitation of freshwater, groundwater level continued to decline, groundwater dropping funnel constantly expanding, and triggered a series of environmental geological problems like ground subsidence. In this paper, the expansion direction of the groundwater funnel and the changes of -50 m funnel closed area and sedimentation rate in the year of ground subsidence are compared and analyzed before and after closing self-contained wells and urban centralized water supply source. The inlfuence of the closure of the self-contained wells on the urban geological environment is discussed.%沧州市位于华北平原东部，属严重资源型缺水地区。自20世纪70年代大量开采深层淡水，地下水水位持续下降，地下水降落漏斗不断扩展，并引发了地面沉降等一系列城市环境地质问题。本文对比分析了关闭自备井和城市集中供水水源地前后地下水漏斗扩展方向和-50 m漏斗封闭面积的变化，以及地面沉降年沉降速率的变化，论述了自备井关闭对城市地质环境的影响。