Preliminary Report on Ground-Water Resources of the Chicago Region, Illinois

Preliminary Report on Ground-Water Resources of the Chicago Region, Illinois
复制标题

伊利诺伊州芝加哥地区地下水资源初步报告

DOI：
--
复制
发表时间：
1959
期刊：
--
影响因子：
--
通讯作者：
T. E. Larson
T. E. Larson
中科院分区：
--
文献类型：
--
作者：
M. Suter;R. Bergstrom;H. F. Smith;G. H. Emrich;W. Walton;T. E. Larson

文献摘要

被引文献

相似文献

本研究的目的是在现有资料的基础上对芝加哥地区的地下水资源进行评价。由于对供水的需求逐渐增加，而且一些含水层的水位持续下降，目前进行这种评估尤为紧迫。伊利诺伊州芝加哥地区的地下水资源由四个产水单元开发：1）冰川漂流含水层; 2）浅白云岩含水层; 3）寒武-奥陶纪含水层; 4）Mt.西蒙·阿奎弗寒武-奥陶纪含水层是最发达的大型地下水供应源。1958年的估计产量超过每天4300万加仑（mgd），接近不对含水层中最低和最具生产力的地层-艾恩顿-盖尔斯维尔砂岩进行脱水就可以开采的数量。自1864年以来，由于抽水，芝加哥寒武纪-奥陶纪含水层的承压能力下降了660英尺。冰川漂流和浅白云岩含水层产生了1957年该地区抽取的127.9 mgd地下水的一半以上。这一撤退导致非抽水水位没有普遍下降，表明潜在的产量比目前的撤退大得多。今后的地下水供应应尽可能取自浅层含水层。
The purpose of this study was to make an evaluation of the ground-water resources of the Chicago region on the basis of available data. Such an evaluation is particularly urgent at this time due to the progressively increasing demands for water supplies and the continuing decline of water levels in some aquifers. Ground-water resources in the Chicago region of Illinois are developed from four wateryielding units: 1) glacial drift aquifers; 2) shallow dolomite aquifers; 3) Cambrian-Ordovician Aquifer; and 4) the Mt. Simon Aquifer. The Cambrian-Ordovician Aquifer has been the most highly developed source of large ground-water supplies. I ts estimated yield in 1958 of more than 43 million gallons a day (mgd) approaches the amount that can be withdrawn without dewatering the IrontonGalesville Sandstone, the lowermost and most productive formation in the aquifer. Artesian pressure in the Cambrian-Ordovician Aquifer at Chicago has declined as much as 660 feet since 1864 as a result of pumpage. The glacial drift and shallow dolomite aquifers yielded more than half of the 127.9 mgd of ground water pumped in the region in 1957. This withdrawal resulted in no general decline in nonpumping water levels, indicating that the potential yield is considerably larger than present withdrawal. Future ground-water supplies should be taken from the shallow aquifers wherever possible.