ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1966.tb01599.x

出版商:Blackwell Publishing Ltd    

年代:1966

数据来源: WILEY

摘要:

AbstractThe Republic of Korea shares the world‐wide problems of water supply variability in time and space ‐ they have too little water at some time and in some places, and too much water in others. Drouth is a recurring threat; floods occur nearly every summer. The floods of July 1965 are reported to have been the most costly in history. The population is increasing at a rapid rate and material things are in short supply. However, the people of Korea are making a tremendous effort to modernize facilities, construct an industrial base, improve agricultural practices, control the rivers and develop water supplies, and in general, improve the standard of living. With a per capita income of about $80 per year, Korea has a long way to go in its climb up the economic ladder, but the people are able, intelligent, energetic and avid for learning and progress. They enjoy one of the highest literacy rates in the Far East, and have a trained core of professionals in most fields, except they lack a trained cadre of specialists in ground‐water studies and have very few experienced water well drillers. During the Japanese occupation of Korea systematic ground‐water studies were begun, and ground‐water development followed soon afterwards. But the limited staff of Japanese geologists employed in the effort returned to Japan at the end of World War II in 1945. In the uncertainty of the next 8 years, which included the Korean War, it was impossible to develop trained manpower and an organization.Presently, there is widespread interest on the part of the Korean Government to develop ground water wherever it may be for such uses as irrigation, industrial supply and development, municipalities, villages, and sanitary rural supply. As a result of this interest the author spent four months in Korea in the fall of 1964 and the spring of 1965 at the request of the Agency for International Development, U. S. Department of State, to review the situation and report on the feasibility of a United States supported effort to help the Korean Government to make systematic studies that would lead to ground‐water development, and to any necessary improvement of their methods of hydrologic data acquisition and

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1966.tb01600.x

出版商:Blackwell Publishing Ltd    

年代:1966

数据来源: WILEY

摘要:

AbstractA two‐dimensional, passive element electric analog model was used to determine the spatial distribution of natural ground‐water recharge in the Santa Cruz River basin of southern Arizona. Existing records were used to draw a ground‐water level contour map of the area in its undeveloped condition. The model was made to duplicate these contours by varying inputs from known locations of recharge. Recharge distribution as determined by the model was consistent with previous estimates, but no direct correlation was found with the contributing drainage

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1966.tb01601.x

出版商:Blackwell Publishing Ltd    

年代:1966

数据来源: WILEY

摘要:

AbstractCalifornia has an enormous stake in the Colorado River. In the southern portion of the State, 80 percent of the water used is furnished by the Colorado River, and this area needs still more water in the immediate years ahead. But it cannot get more from the natural supply of the Colorado. The river is already over‐committed, and California in fact may have to cut back on its present take from that source. This is not the Colorado River in Texas; Los Angeles has gone hundreds of miles to get water, but has not reached that far east‐

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1966.tb01602.x

出版商:Blackwell Publishing Ltd    

年代:1966

数据来源: WILEY

摘要:

AbstractThe tidal efficiencies of wells tapping the principal artesian aquifer in Glynn County, Georgia decrease with distance from the influencing tidal body and also decrease with well depth. Although the magnitude of water‐level fluctuation of these wells is largely dependent upon the distance to a large tidal body, the time of a high or a low water level in the wells is mainly dependent upon the time of a high or a low tide in a small, nearby tidal body. A modified formula for computing tidal efficiency is developed:From this formula, tidal efficiency can be calculated rapidly and easi

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1966.tb01603.x

出版商:Blackwell Publishing Ltd    

年代:1966

数据来源: WILEY

摘要:

AbstractA simplified method for determining the coefficient of transmissibility of an aquifer being pumped intermittently is developed by applying Stirling's Approximation Formula to the factorial functions in the Theis and Brown equation for drawdown in a well due to intermittent or cyclic discharge. A table of values of K, a term used in the simplified method, corresponding to the fraction of each cycle during which time discharge occurs is also presented.

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1966.tb01604.x

出版商:Blackwell Publishing Ltd    

年代:1966

数据来源: WILEY

摘要:

ABSTRACTThe digital computer is used on a routine basis in the ground‐water program in Kansas for tasks ranging from the listing of water‐quality data in tabular and publishable form to statistically and graphically analyzing a mass of data.In the past year a number of computer programs in FORTRAN IV have been developed by Charles O. Morgan and Jesse M. McNellis using an IBM‐7040 computer to store, retrieve, and manipulate water‐quality data. These programs:(1) Tabulate data at the rate of 40 chemical analyses of water per minute in a format similar to that found in the Kansas ground‐water publications.(2) Perform necessary calculations and print Stiff diagrams at the rate of 30 per minute.(3) Perform necessary calculations and print Piper diagrams, including a square modification of the normally diamond‐shaped cation‐anion diagram, and trilinear diagrams of the cations and anions. The symbol representing the analyses located on the diagrams can be designated by either an analysis number or a geologic unit number. A cation‐anion diagram showing the average chemical composition of water for an aquifer can also be printed. These diagrams for 50 analyses can be produced in 1.5 minutes.(4) Plot maps of 42 individual, combined, or calculated parameters obtained from the data cards. These maps can be plotted to any specified scale and for as many as 10 designated geologic units. Computer time involved for one map with 50 plotted points is 15 seconds.It is estimated that the use of these programs will save several man‐months during a ground‐water study, and the error inherent in the manual manipulation of data is greatly reduced. The present cost for running 50 analyses through the four water‐quality programs on the computer

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1966.tb01605.x

出版商:Blackwell Publishing Ltd    

年代:1966

数据来源: WILEY

摘要:

AbstractA type‐curve method for determining anisotropy of unconfined aquifers, developed from electric analog simulation, is applied to drawdowns observed near, a well pumping from a glacial outwash aquifer at Piketon, Ohio. The coefficient of vertical permeability, P z'averaged 365 gpd per square foot. Computed drawdown for the pumped well, based on this value, differed by only a small amount from the observed drawdown. The coefficient of storage, determined from type curves for an image well system, averaged 0.20, typical of unconfined aquifers. Application of the method required a thorough knowledge of geohydrologic controls operating at the test sit

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1966.tb01606.x

出版商:Blackwell Publishing Ltd    

年代:1966

数据来源: WILEY

摘要:

AbstractIn the past 20 years, since 1945, there has been a substantial increase in the application of electric well logging to water wells. In the early days, there were very few water wells being logged, principally city supply wells and other larger commercial wells. Now, it is not uncommon to be called to service water wells of all sizes, even the small back yard well. The well drilling industry is becoming more and more aware of the benefits that can be derived from use of the electric log, and there will almost certainly be an increase along these lines in the years ahead. There are some very good reasons for this growth and acceptance of the electric log, and pointing out some of these reasons and applications of the electric logs to water well drilling is the purpose of this paper.

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1966.tb01607.x

出版商:Blackwell Publishing Ltd    

年代:1966

数据来源: WILEY