ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1964.tb01763.x

出版商:Blackwell Publishing Ltd    

年代:1964

数据来源: WILEY

摘要:

AbstractHydrogeologic studies in foothill watersheds have included diamond‐core drilling, installation of observation wells, and pumping tests. Detailed study of recovered cores has provided reasonable estimates of porosity. Pumping tests of the two‐inch diameter wells have given estimates of the transmissibilities ranging from 6 to 600 gallons per day per foot. Test data from several wells indicate that the hydraulics of water movement in jointed rock systems is not governed by the usual mathematical mod

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1964.tb01764.x

出版商:Blackwell Publishing Ltd    

年代:1964

数据来源: WILEY

摘要:

AbstractIt is of the utmost importance that ground‐water users understand the basic concept that all the ground water within a single set of hydrologic and geologic boundaries is part of a single hydrologic system. It is therefore worthwhile for all ground‐water users to understand the manner in which ground water moves through the pore spaces of saturated rock and to understand the various configurations of the water table brought about by the pumping of water table wells. The movement of ground water is illustrated in two hydraulic models which were constructed in order to bring ground‐water flow into surroundings where it can be visually observed. The models consist of watertight plexi‐glass cases containing a porous consolidated mixture of sand and epoxy resin, which simulates a true sandstone. The models are used to study cones of depression produced by pumping wells. Photographic histories of several ground‐water flow conditions are il

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1964.tb01765.x

出版商:Blackwell Publishing Ltd    

年代:1964

数据来源: WILEY

摘要:

AbstractThe hydrology of ground‐water recharge depends upon the physical and chemical characteristics of both soil and water. These characteristics must be measured and related to subsurface storage space and water movements to determine the feasibility of a site for recharge and to select appropriate methods and systems of recharge. Then water may be efficiently stored underground to be used independently or conjunctively with releases from surface storage reservoir

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1964.tb01766.x

出版商:Blackwell Publishing Ltd    

年代:1964

数据来源: WILEY

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1964.tb01767.x

出版商:Blackwell Publishing Ltd    

年代:1964

数据来源: WILEY

摘要:

AbstractIncreased activity in the fields of ground‐water geology and hydrology has focused attention on the academic preparations required of a geologist or engineer planning to enter the field of ground water. In an effort to improve understanding of the educational facilities available in the United States and Canada, the Research Committee of the Technical Division of the National Water Well Association is periodically inquiring into the status of these facilities.To arrive at a better understanding of the formal course work in ground water, a seven‐item questionnaire was circulated to appropriate educational institutions in May 1960. A report, “Educational and Academic Research Facilities in Ground‐Water Geology and Hydrology in the United States and Canada”, was published in May 1961 summarizing the information obtained from returned questionnaires. A similar survey was made in May 1963 to obtain data on advancements in educational facilities in ground water since 1960.This report, a contribution of the Technical Division of NWWA, is based on questionnaires completed in 1963 and provides statistical data on university and college facilities in the field of ground water. Detailed information is presented on 1) course work, 2) textbooks, 3) degrees granted, 4) descriptions of departments offering course work, 5) course instructors and 6) student training and employment. Recent advancements in educational facilities are summarized. It is hoped that the statistical and descriptive information embodied in this report will provide a suitable background for those who wish to assess the adequacy of available educational facilities in ground‐water geology an

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1964.tb01768.x

出版商:Blackwell Publishing Ltd    

年代:1964

数据来源: WILEY

摘要:

AbstractResistance network analogs (R‐analogs) permit solution of ground‐water flow systems in media that may be uniform or non‐uniform, isotropic or anisotropic, and saturated or unsaturated. Two‐dimensional as well as axisymmetric systems can be represented on the analog and complex boundary conditions can easily be simulated. Only steady‐state systems can be analyzed with the R‐analog. However, systems with moving water tables whereby the rate of movement of the water table is controlled by the flow system below the water table can be solved as a succession of steady states. To capitalize on the special feature of R‐analogs, i.e. essentially unlimited opportunity for control of the resistance between any two nodes, use of calibrated variable resistors is desirable. R‐analogs are specially adapted to obtain solutions of individual flow systems, of which a vertical cross section is simulated on the analog. In the analog model, resistances are inversely proportional to hydraulic conductivities or transmissibilities, electric current rates are proportional to rates of water flow, and electric potentials are proportional to the sum of pressure head and elevation head. R‐analogs may be used to analyze the flow system of a pumped well, a groundwater recharge facility, a series of parallel drains, a seeping dam, a surface stream feeding the ground water, etc. Examples are presented of flow problems involving free‐surface development, simultaneous occurrence of saturated and unsaturated parts of the medium, moving water tables, and determination of transmissibility distribution and safe yield of ground‐water basins. The application of R‐analogs in developing realistic cause‐and‐effect relationships for use with resistance‐capacitance analog models of entire ground‐water basin

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1964.tb01769.x

出版商:Blackwell Publishing Ltd    

年代:1964

数据来源: WILEY

摘要:

AbstractThe problem of integrating or coordinating surface water and ground‐water use is becoming serious in many areas where the two supplies are hydraulically connected. Because surface waters were generally developed first in the West, later development of connected ground‐water supplies has tended to devaluate the prior appropriations on the streams. Legally, those withdrawing such ground water may be in jeopardy. However, the highest beneficial use of the total water resources can only be obtained through a combined or integrated use of both surface and ground water. A simple hypothetical stream‐aquifer situation is used to illustrate the influence of ground‐water pumping upon surface flows and water available for diversion. One example of a possible solution is presented. Legal and economic factors must also be considered in designing the best physical si

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1964.tb01770.x

出版商:Blackwell Publishing Ltd    

年代:1964

数据来源: WILEY

摘要:

AbstractThe writer reviews some of the best known features of mechanical dispersion and the influence of molecular diffusion on breakthrough curves obtained for saturated and nonsaturated samples of porous medium. Miscible flow is also considered as flow of a non‐homogeneous fluid in a porous medium. Special concepts of head, as introduced by Lusczynski, are reviewed and modified in order to facilitate the determination of the velocity field in the zone of dispersion. The method described is applicable in principle to the migration of water in building materials exposed to sea wate

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1964.tb01771.x

出版商:Blackwell Publishing Ltd    

年代:1964

数据来源: WILEY

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1964.tb01772.x

出版商:Blackwell Publishing Ltd    

年代:1964

数据来源: WILEY