ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1969.tb01663.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

摘要:

ABSTRACTNew sanitary landfills are being opened each day to accommodate the rising volume of solid wastes. Selection of proper sites is a very major part of the disposal problem, particularly as they might affect the surrounding surface and ground water.Leachate production is inevitable in the humid East and throughout most of the country. Several alternatives are suggested that would result in the assimilation of migrating leachate into, the environment at tolerable limits or for its renovation prior to final discharge: Alternative 1—knowledge of existing hydrogeologic conditions which would favorably control the rate and direction of leachate migration; Alternative 2—engineering the landfill by construction of low‐cost facilities to collect and treat leachate; and Alternative 3—construction of limited collection facilities to supplement natural conditions.It is suggested that more emphasis be given to hydrogeologic factors in the selection of refuse disposal sites to insure protection of surrounding surface and ground water. It is time to approach the waste disposal problem on a more sophisticated level by requiring test drilling, monitoring, and by giving consideration to the engineering of, landfills so that man's health and' environment are not jeop

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1969.tb01664.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

摘要:

AbstractThe growing number of ground‐water research projects that are based primarily on potential distribution data has stimulated the development of several new types of potential measuring, instruments. The primary requirements for these instruments are longevity, precision, sensitivity, and short timelag. Ease of installation, minimum maintenance, low capital investment, and provision of a continuous record are equally desirable. Generally, available instruments will satisfy two or three, but not all of these requirements.The need for a piezometer possessing all these characteristics was encountered during a flow‐system study beneath an irrigated field. A piezometer subsequently was designed which combines the sensitivity of a Keckeelectrical water‐level sensing device with the continuous record provided by a Stevens Type F, graphic recorder. Replacement of the standard Keck sensing “Bob” with a probe specifically designed for small diameter pipes (5/16‐inch I.D.),*provides instrumentation with a short timelag. The absence of a diaphragm and strain gauges enhances longevity. The device is inexpensive, simple and easily installed. Samples of well water for chemical analysis may also be obtained from the

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1969.tb01665.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

摘要:

AbstractAn analysis is presented for the nonsteady state problem of a well, pumping a constant discharge, and located at the center of a circular aquifer surrounded by a radial discontinuity. On either side of the discontinuity, the transmissibility and the storage coefficient are constant but may have different values from those on the other side of the discontinuity. The solution is obtained by using an approximate inversion formula for Laplace transforms. This method leads to a relatively simple set of equations which commonly requires only short computer time for solution.

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1969.tb01666.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

摘要:

AbstractWater‐supply problems in Spain have become acute during the past decade owing to expansion of industry, construction of modern houses and apartments, and development of a tourist industry. A training program in ground‐water hydrology and geology was established three years ago in Barcelona to help supply personnel who would be able to cope with these problems. Training is also given to foreign nationals, a total of nine countries having been represented to date. Part of the success of the school rests on the fact that a large variety of ground‐water problems exist in the vicinity of Barcelona. Students obtain a firsthand knowledge of sea‐water intrusion, aquifer‐testing techniques, agricultural and municipal degradation of water quality, and drilling and exploration techniques within a wide variety of r

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1969.tb01667.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

摘要:

ABSTRACTA simple and rapid method of determining casing length and permeable zones in wells tapping bedrock can be useful to well drillers and hydrologists. A device consisting of a galvanometer, a reel of insulated wire, and a copper electrode locates the casing depth, changes of lithology, and permeable zones. The small‐diameter electrode permits measurement through well‐seal access ports avoiding the expensive and time‐consuming procedure of removing the seal and drop pipes to measure casing depth with a magnet. The measured electromotive force changes rapidly when the electrode passes the end of casing. Thus, the depth of casing is easily determined from the length of wire payed out. Changes in electromotive force measured within the uncased part of a well frequently indicate permeable zones, thereby aiding in choice of the most efficient drop‐pipe length, and also yielding useful information for hydrogeologic

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1969.tb01668.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

摘要:

ABSTRACTIn a steady‐state condition the lateral flow rate through the unsaturated zone of an unconfined aquifer increases with a decreasing rate as the depth of the unsaturated zone increases while hydraulic gradient is kept constant. This flow rate reaches a maximum as the depth of the zone is increased. This maximum flow rate is computed by various methods such as an aquifer model, graphical integration of the characteristic hydraulic conductivity curve and a flow net diagram. Based on these calculations a simple method is outlined for estimation of steady‐state flow rate through the unsaturated zone of an unconfined aquifer. It is also concluded that in shallow unconfined aquifers the contribution of the flow through the unsaturated zone to the total lateral flow can be signific

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1969.tb01669.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1969.tb01670.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1969.tb01671.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY