ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1969.tb01290.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

摘要:

ABSTRACTThe Deep Tunnel System planned by the Metropolitan Sanitary District of Greater Chicago will provide flood and pollution control for the combined sewer areas of the Chicago region. Elements of the Deep Tunnel System that are of main concern to the ground‐water resources of the area are the conveyance tunnels and the mined storage reservoir which will convey and store polluted storm‐water overflows. The Silurian and the Cambrian‐Ordovician aquifers, in units of which these elements will be located, will be protected from any deleterious effects of the System by ensuring that a positive hydraulic head, causing an inward flow, is continuously maintained around the tunnels and the mined reservoir. In the Cambrian‐Ordovician aquifer, this necessitates1 that ground‐water levels are maintained by artificial recharge. Extensive ground‐water studies were conducted to (1) demonstrate the feasibility of aquifer protection by recharge, (2) determine the needed amounts of recharge water, and (3) estimate the seepage of ground water into the tunnels and mined res.ervoir. The studies included field investigations, analog computer analyses and office evaluation of the collected data and analog results. The results indicate that (1) the proposed aquifer protection is feasible, (2) the recharge requirements will vary from 1.4 mgd in 1976 to 6.0 mgd in 2010, (3) seepage into the tunnels will be small, in amounts that can be easily

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1969.tb01291.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

摘要:

AbstractA simplification of the two most commonly used methods of network planning and scheduling is ideally suited to the planning and evaluation of both water resources studies and construction projects. The project planning diagrams illustrate the system for scheduling of project activities and the relation of each activity to the others.

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1969.tb01292.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

摘要:

ABSTRACTThe best features of analog and digital computers were combined to make a management model of a stream‐aquifer system. The analog model provides a means for synthesizing, verifying, and summarizing aquifer properties; the digital model permits rapid calculation of the effects of water‐management practices. Given specific management alternatives, a digital program can be written that will optimize operation plans of stream‐aquifer systems. The techniques are demonstrated by application to a study of the Arkansas River valley in southeastern Col

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1969.tb01293.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

摘要:

ABSTRACTPresent ground‐water use in Ohio, approximately 650mgd (million gallons per day) amounts to about 5 percent of the water that enters the ground‐water reservoirs. The largest ground‐water supplies are developed where natural concentrations of water occur, chiefly in the watercourse aquifers, which consist of sand and gravel of glacial origin (outwash) in the valleys of the major streams. Other important aquifers are glacial outwash in upland areas and in the buried Teays Valley system, the limestone and dolomite aquifers in western Ohio, and sandstone and shale aquifers in the eastern half of the State.Future outlook is that more of the increasing water demand will be met from ground‐water sources. Ground‐water supplies will be developed at many new sites, and aquifers in areas already heavily pumped will be made to yield more water by the drilling of additional wells and recharging the aquifers artificially. Large quantities of ground water in storage, virtually unexploited, could be used for temporary low‐flow augmentation of streams. Management of ground‐water resources will be needed to help solve supply and distribution problems, and to resolve conflicts between users. Among future problems will be those arising from underground disposal of wastes, a practice which is expected to grow substantially from enforcement of water‐quality standards for streams, set under the Federal Water Qual

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1969.tb01294.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY