ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1983.tb00696.x

出版商:Blackwell Publishing Ltd    

年代:1983

数据来源: WILEY

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1983.tb00697.x

出版商:Blackwell Publishing Ltd    

年代:1983

数据来源: WILEY

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1983.tb00698.x

出版商:Blackwell Publishing Ltd    

年代:1983

数据来源: WILEY

摘要:

ABSTRACTToxic waste contamination is currently threatening the Atlantic City, New Jersey public water‐supply wells. The geohydrologic data for this region are presented and organized into a format suitable for a numerical model study of the contamination problem. Presentation of the data in light of numerical work reveals the importance of good estimates of boundary conditions, historical pumping records, reliable water‐quality data, accurate well logs, and reasonable parameter estimates. One set of measured head data is simula

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1983.tb00699.x

出版商:Blackwell Publishing Ltd    

年代:1983

数据来源: WILEY

摘要:

ABSTRACTA numerical model of flow and transport in the vicinity of Price's Landfill and the Atlantic City public water‐supply wells is used to estimate the extent of the existing contamination problem. Model parameters such as boundary conditions, pumping rates, permeability, and dispersivity are varied to demonstrate the sensitivity of the model to these quantities. A historical simulation of the past ten years of contamination is obtained and two schemes for remediation of the contamination problem are compared. In the light of this work, additional data requirements are reveale

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1983.tb00700.x

出版商:Blackwell Publishing Ltd    

年代:1983

数据来源: WILEY

摘要:

ABSTRACTDetermination of the potential of a specific confined aquifer as an effective thermal energy storage medium requires thorough knowledge of the geochemical, thermodynamic, and hydraulic properties of the aquifer and its confining layers. A series of laboratory and field studies must be performed in order to determine the fundamental parameters. Procedures and analyses of a series of tests for a confined aquifer near Mobile, Alabama were completed prior to an aquifer thermal energy storage experiment. Parameters determined were: the regional gradient; vertical and horizontal permeabilities of the storage aquifer; horizontal dispersivity of the storage aquifer; vertical permeability of the confining layers; and thermal conductivities, heat capacities, and chemical characteristics of the aquifer matrix and native ground water.

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1983.tb00701.x

出版商:Blackwell Publishing Ltd    

年代:1983

数据来源: WILEY

摘要:

ABSTRACTIon‐exchange high performance liquid chromatography coupled with ultraviolet absorption detection is shown to be a rapid and sensitive method for analysis of some common anions in water. Sensitivity of measurement is approximately 50 ppb for NO−2, NO−3, Br−, I−, and SCN−while Cl−has a detection limit in the one to ten ppm range. Chromatograms require 8 to 13 minutes to complete. Analyses are performed on either of two stationary phases (Whatman SAX 10 μm or Brownlee anion exchange) depending on the anions of interest in the analysis and their

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1983.tb00702.x

出版商:Blackwell Publishing Ltd    

年代:1983

数据来源: WILEY

摘要:

ABSTRACTVertical electrical soundings using DC resistivity methods have been completed along over 60 miles of survey lines in southwest Florida. The resistivity soundings were obtained in order to outline major hydrogeologic features as part of a regional hydrogeologic investigation covering approximately 400 square miles. The two significant hydrogeologic features which can be effectively mapped on a regional scale by DC methods are the presence of shallow, high resistivity limestones associated with late Tertiary reef complexes, and the approximate depth to waters with TDS concentrations well above the potable water limits. The reef limestones commonly exhibit very high transmissivities and are potential sites for ground‐water development. The approximate thickness of potable waters allows resource investigations to be limited to the most promising areas and a rough assessment of the total resource to be made for long‐term planning. The interpretation and mapping of the resistivity section is accomplished through published resistivity inversion and computer graphics programs. This automated data processing produces resistivity maps and sections without requiring extensive geophysical training of the interpreter. The automatic interpretations compare well with more traditional master curve interpretation procedures, and have the same limitations with equivalence of solutions and geologic correlation, but are produced with considerably less eff

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1983.tb00703.x

出版商:Blackwell Publishing Ltd    

年代:1983

数据来源: WILEY

摘要:

ABSTRACTThe soil parameters that determine the infiltration rates of a shallow unconfined coastal aquifer due to rainfall were obtained using the recursive least squares method. The parameters were predicted by minimizing the mean square error between the estimated and measured water‐table levels in a bore hole. The parameters λt, a drainage factor, βt, a parameter which accounts for external disturbances, and αt, a set of parameters which determine the infiltration rates due to rainfall, were all treated as time‐dependent variables. Their variation is traced by introducing a “forgetting factor” in the algorithm used to determine the parameters. The parameters were determined using rainfall and water‐table levels for the year 1979 at a bore hole. The parameters βtand αtvaried considerably over the period of time and λtremained constant. From the parameters obtained, it appears that most of the recharge due to rainfall takes place within the first two days of the event. After two days there is very little variation in the water‐table level due to rainfall although there is a slight drop on the third, fourth and fifth day, presumably due to the escape of entrapped air beneath the

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1983.tb00704.x

出版商:Blackwell Publishing Ltd    

年代:1983

数据来源: WILEY

摘要:

ABSTRACTThe Kufra and Sarir basins of Libya have huge ground‐water resources. Three well fields–Sarir, Kufra, and Jalo–have been constructed for irrigation purposes. The Tazerbo and West Sarir well fields are under construction. Wells in these well fields have tapped only a small portion of the total ground water available. The hydrological behavior of the Sarir well field (determined by using analytical and numerical models) indicated a leaky artesian aquifer and a significant partial penetration effect. Long and short‐term pump tests did not provide true estimates of the values of transmissivity and the coefficient of storage.A steady‐state model of the Kufra and Sarir basins indicated a minimum of 80 m3/s of underflow entering from Tibesti, Chad and Sudan. A transient model was constructed to pump a total of 120 m3/s from 14 well fields. The simulation indicated that sufficient drawdown was available to last at least

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1983.tb00705.x

出版商:Blackwell Publishing Ltd    

年代:1983

数据来源: WILEY