Geology topics

S.E. Matthews

Publications and source records attributed to S.E. Matthews.

5 recordsLinked to original sources

USGS1983

Ground-water data for Georgia, 1982

Continuous water level records from 105 wells, and more than 2 ,000 water level measurements made in Georgia during 1982 provided the basic data for this report. Selected wells illustrate the effects that changes in recharge and pumpage have had on the various groundwater resources in the State. Daily mean water levels are shown in hydrographs for 1982. Monthly means are shown for the 10-yr period 1973 and 1982. Mean annual water levels ranged from 10 ft higher to 1 ft lower in 1982 than in 1981. This is a significant reversal of the downward trend of the past few years. Water quality samples are collected periodically throughout Georgia and analyzed as part of areal and regional groundwater studies. Along the coast, chloride concentrations have remained stable in the Savannah area, but invasion of brackish water into the aquifer has increased the chloride concentration at Brunswick. (Author 's abstract)

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USGS1983

Hydrogeologic data from the US Geological Survey test wells near Waycross, Ware County, Georgia

Two wells were constructed near Waycross, Ware County, Georgia, from July 1980 to May 1981 to collect stratigraphic, structural, geophysical, hydrologic, hydraulic, and geochemical information for the U.S. Geological Survey Tertiary Limestone Regional Aquifer-System Analysis. Data collection included geologic sampling and coring, borehole geophysical logging, packer testing, water-level measuring, water-quality sampling, and aquifer testing. In the study area, the Tertiary limestone aquifer system is about 1,300 feet thick and is confined and overlain by about 610 feet of clastic sediments. The aquifer system consists of limestone, dolomite, and minor evaporites and has high porosity and permeability. A 4-day continuous discharge aquifer test was conducted, from which a transmissivity of about 1 million feet squared per day and a storage coefficient of 0.0001 were calculated. Water from the upper part of the aquifer is of a calcium bicarbonate type. The deeper highly mineralized zone produces a sodium bicarbonate type water in which concentrations of magnesium, sulfate, chloride, sodium, and some trace metals increase with depth. (USGS)

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USGS1982

Ground-water data for Georgia, 1981

More than 2,000 water-level measurements made in Georgia in 1981 provide the basic data for this report. Daily mean water-level fluctuations and trends are shown in hydrographs for the previous year (1980) and fluctuations of the monthly mean water levels are shown for selected years in some observation wells in Georgia. Water-quality samples are collected periodically throughout Georgia and analyzed as part of areal and regional ground-water studies. Along the coast, chloride concentrations have remained stable around Savannah, but invasion of brackish water into the aquifer at Brunswick has increased the chloride concentration. Mean annual water levels throughout Georgia ranged from 3.42 feet higher to 12.68 feet lower in 1981 than in 1980, and in some areas were the lowest on record.

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USGS1981

Ground-water data for Georgia, 1980

More than 2,000 water-level measurements made in Georgia in 1980 provided the basic data for this report. Daily mean water-level fluctuations and trends are shown in hydrographs for the previous year and fluctuations of the monthly mean water level are shown for the previous 10 years in selected observation wells in Georgia. Monitoring ground-water levels is essential to the understanding of storage changes in a ground-water reservoir or aquifer. Fluctuations and long-term trends in water levels occur as a result of recharge to and discharge from the reservoir. Mean annual water levels across Georgia were from 1.92 feet higher to 12.61 feet lower in 1980 than in 1979, and in some areas were the lowest on record. (USGS)

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USGS1980

Ground-water data for Georgia, 1979

This report continues a publication format that annually presents both water-level and water-quality data. In this format the information is presented in two-page units: the left page presents a text which summarizes the information for an area or subject and the right page consists of one or more illustrations. Daily mean water-level fluctuations and trends are shown in hydrographs for the previous year and fluctuations of the monthly mean water level for the previous 10 years in selected observation wells in Georgia. The selected wells best illustrate the effects of changes in recharge and discharge in the various ground-water reservoirs in the State A short narrative explains fluctuations and trends in each hydrograph. Monitoring ground-water levels is essential to the understanding of storage changes and other changes in a ground-water reservoir or aquifer. Fluctuations and long-term trends in water levels occur as a result of recharge to and discharge from the reservoir. Varying rates of recharge occur chiefly as a result of varying rates of precipitation, evapotranspiration, and surface-water infiltration into the ground-water reservoir. Discharge occurs as natural flow from the aquifer to streams and springs, direct ground-water evapotranspiration, and as manmade withdrawal from wells. Ground-water levels have been monitored in Georgia for at least a hundred years. Most of the data gathered were used in area 1 reconnaissance studies, and published, usually as tables, with a few graphs of water-level trends. These data had limited value, especially considering the time lag between data collection and publication. With the advent of continuously monitoring recorders and computer processing of data, this information can now be presented to the user in an understandable and timely manner.

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