ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1976.tb03113.x

出版商:Blackwell Publishing Ltd    

年代:1976

数据来源: WILEY

摘要:

ABSTRACTA method for collection and analysis of well cuttings samples to aid in ground‐water resources evaluation of certain types of alluvial aquifers is described. The method standardizes collection procedures which minimize disruption of the drilling process and allows for easier laboratory interpretation. Analysis techniques for soils are adapted to differentiate between the formations encountered. Wet and dry colors, particle size analysis, acid reaction, plus examination of mineral constituents permits correlation of formation characteristics from wells constructed at different times and by different drillers. An example of the procedure for an area northwest of Tucson, Arizona is give

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1976.tb03114.x

出版商:Blackwell Publishing Ltd    

年代:1976

数据来源: WILEY

摘要:

ABSTRACTLarge well‐field developments in the Mid‐Gulf area have caused abnormal lowering of nearby lakes. A map showing the differential head between the surficial aquifer and the underlying limestone Floridan aquifer showed values ranging from 20 feet to zero at a location where the aquiclude is absent. Lake levels had been restored by pumping from limestone wells. From pumping data and analysis of recession limbs, lineal relations between recession rates and differential head appeared to exist. From these, leakance values and vertical permeabilities were determined, with the latter values for two distinctly different sites ranging from 2 × 10‐2to 200

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1976.tb03115.x

出版商:Blackwell Publishing Ltd    

年代:1976

数据来源: WILEY

摘要:

ABSTRACTA computer program, based on the Hantush inflection method and designed for “desk top” computers is presented. The method assumes a leaky, isotropic, homogeneous aquifer of infinite areal extent. The language employed is BASIC, an interactive language used on the Wang Model 2200 programmable calculator. The program can be easily adapted to FORTRAN IV for use on larger machi

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1976.tb03116.x

出版商:Blackwell Publishing Ltd    

年代:1976

数据来源: WILEY

摘要:

ABSTRACTThe application of deicing salts is usually a highly successful strategy in improving driving conditions but the environmental impact of such actions may be a cause for concern. Since cheap, harmless and efficient alternatives to salt are not currently available it is suggested that moderation and regulation of salt applications are necessary if harmful side‐effects of deicing salts are to be minimize

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1976.tb03117.x

出版商:Blackwell Publishing Ltd    

年代:1976

数据来源: WILEY

摘要:

ABSTRACTA study of the quality of ground water from 250 open wells in the coastal aquifer of Kaniti‐Paravada near Visakhapatnam, India brings out the fact that the occurrence of highly brackish waters in certain localized pockets is due to the hydrogeological processes going on in the area and not due to the influence of the sea. The phenomenon is verified by determining standard ratios of tracing sea‐water contamination like Ca/Mg, Cl/HCo3’and TA/TH. Conductivity and sodium adsorption ratio are also determined for finding out the alkali hazard, to supplement the observa

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1976.tb03118.x

出版商:Blackwell Publishing Ltd    

年代:1976

数据来源: WILEY

摘要:

ABSTRACTGround‐water contamination from uranium mining and milling results from the infiltration of mine, mill, and ion‐exchange plant effluents containing elevated concentrations of radium, selenium, and nitrate. Available data indicate that radium concentrations in the discharge waters of a producing mine tend to increase substantially as the ore body is developed. Whereas natural background radium concentrations are generally about several picocuries/liter (pCi/l), 100 to 150 pCi/l appear in the effluents of operating mines. The discharge of such highly contaminated mine effluents to streams and seepage from tailings ponds, creates a long‐lived source of ground‐water contamination. Seepage of mill tailings at two active mills ranges from 126,000 to 491,000 m3/yr and, to date, has contributed an estimated 2400 Curies of uranium, radium, and thorium to the ground‐water reservoir. The shallow aquifer in use and downgradient from another mill has been grossly contaminated with selenium, attributable to excessive seepage from a nearby tailings pond.Radium, selenium, nitrate and, to a lesser extent, uranium, are of most value as indicators of ground‐water contamination. Gross alpha results are not consistent indicators of radium or uranium in water, although uranium does appear to be the principal contributor of alpha activity. Accurate radium‐s226 analyses yield the most information for radiological evaluation of drinking water.To date, no adverse impacts on municipal groundwater supplies have been observed. However, industry‐sponsored environmental monitoring programs are inadequately designed and implemented, and may not define the full, long‐term impact of mining and milling operations on the ground‐water qualit

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1976.tb03119.x

出版商:Blackwell Publishing Ltd    

年代:1976

数据来源: WILEY

摘要:

ABSTRACTAn individual home waste nitrogen and phosphorus removal system was evaluated in the laboratory. The gravity flow system consisted of a 10 × 60 cm (4 × 24 in) vertical Plainfield sand column followed by a series of 8 × 32 cm (3 × 12 in) horizontal columns filled with calcite (CaCO3) or dolomite (Ca MgCO3). Nitrogen removal was attempted using a nitrification‐denitrification system where methanol was used as an energy source and P removal was attempted using calcite and dolomite. Separate experiments running from 4 to 6 months were used to test various diameter calcite and dolomite. The phosphorus removal system was also the site of denitrification and hence was in an anaerobic environment. Nitrogen removal was successful with approximately 60–100% removal in a 1‐day residence time after methanol addition. Increased denitrification rates were observed using smaller diameter filling materials but no differences were observed between equal‐diameter calcite and dolomite. Phosphorus removal was successful initially but after approximately one month, the ability of the calcite or dolomite to sorb phosphorus was curtailed in a 3‐day residence time. Results indicated that calcite was superior to dolomite and smaller diameter material was superior to larger diameter in removing phosphorus. However, it appeared that slime growth and organic anion competition covering the sorption sites on the calcite and dolomite prevented significant phosphorus removal after the first

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1976.tb03120.x

出版商:Blackwell Publishing Ltd    

年代:1976

数据来源: WILEY

摘要:

ABSTRACTA preexisting network of 124 wells used for fire protection in the Town of Southampton, Long Island, New York, was monitored during a one‐year period for groundwater levels and chloride concentrations. Water from 26 wells had chloride concentrations of 50 mg/l or greater and in 17 wells the chloride concentration exceeded 200 mg/l. Most of these wells are located in two densely populated areas. The possibility of widespread intrusion in one of these areas has not been previously documented. In addition, detailed water‐table contour maps are presented for selected areas within the T

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1976.tb03121.x

出版商:Blackwell Publishing Ltd    

年代:1976

数据来源: WILEY

摘要:

ABSTRACTA hydrochemical study is outlined which demonstrates the mixing of two different ground‐water types in the Lincolnshire Limestone aquifer. The two water types consist of a modern recharge water and an ancient possibly connate water. The hydrochemistry of the “interface zone” between the two waters is discussed in detail. In the younger water a relationship between sulphate reduction and bicarbonate is illustrated approaching the “interface zone” and is considered to be related indirectly to the mixing. Carbon isotope content is shown to be radically different in the various ground waters and supports the mixing h

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1976.tb03122.x

出版商:Blackwell Publishing Ltd    

年代:1976

数据来源: WILEY