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USGS1964

Natural sources of salinity in the Brazos River, Texas with particular reference to the Croton and salt Croton Creek basins

The average daily load of the Brazos River at Possum Kingdom Reservoir is about 2,800 tons of dissolved solids, of which 1,000 tons is chloride. More than 85 percent of the chloride load is contributed by the Salt Fork Brazos River, and more than 50 percent of the chloride load of the Brazos River originates from salt springs and seeps in Croton and Salt Crotdn Creeks, which are tributaries of Salt Fork Brazos River. The rest of the chloride is contributed from many small sources. The average daily chloride load of Croton Creek is 70 tons, much of which is carried during periods of flood runoff. The average daily chloride load of Salt Croton Creek is about 480 tons. Of this total, 330 tons is contributed by the base flow, which ranges from 0.5 to 2 cubic feet per second. The principal areas of salt springs and seeps in the Croton Creek basin are Hot Springs and Short Croton Salt Flats in northeastern Kent County. In the Salt Croton Creek basin, saline water is discharged in Dove Creek Salt Flat, Dove Creek near Dove Creek Salt Flat, and three small salt flats on Haystack Creek, all in southwestern King County and northwestern Stonewall County. Salt springs and seeps discharge from the rocks of the Whitehorse Group undifferentiated in the Croton Creek basin, and from the upper part of the Dog Creek Shale of the Pease River Group in the Salt Croton Creek basin. Both groups are of Permian age. The water that is discharged by springs and seeps in the Croton Creek basin is derived from the infiltration of precipitation and seepage from streams in the Duck Creek basin. The source of the water that discharges in the Salt Croton basin is not known. The salt load contributed to the Brazos River by the springs and seeps can be reduced, although the volume of salt water for disposal probably cannot be reduced or eliminated. Collecting and disposing of the base flow of Salt Croton Creek would reduce the salt load of the Brazos River by 30 percent; disposal of the total flow of Salt Croton Creek would reduce the salt load by 45 percent. The salt water may be disposed of by impounding it in reservoirs for evaporation or by injecting it underground through oil wells, oil tests, or wells drilled for saltwater disposal. Sediments in which the salt water possibly could be injected underlie the. Dove Creek Salt Flats at depths of less than 7,000 feet.

Texas↗
USGS1963

Low-flow frequency curves for selected long-term stream gaging stations in eastern United States

Curves showing the magnitude and frequency of annual low flow at 85 streamgaging stations located in 17 States east and 5 States west of the Mississippi River have been smoothed and adjusted to one of four long-term periods. They are presented to show the similarity and dissimilarity of curves even in the same State and to provide background information for studies of the statistical properties of low-flow frequency curves and for studies of the relation between hydrologic environment and low flow. The results are presented as greatly reduced graphs to facilitate comparison and are summarized in tables from which expanded graphs can be plotted.

Water Supply Paper↗
USGS1964

Ground-water conditions in the Green Bay area, Wisconsin, 1950-60

The Green Bay area, which includes parts of Brown, Outagamie, and Shawano Counties, has an area of about 525 square miles in eastern Wisconsin at the south end of Green Bay. In 1960, it had a population estimated at 124,000; Green Bay, the largest city in the area, had a population of 62,888. The Green Bay area is underlain by a basement complex of crystalline rocks of Precambrian age. Sedimentary rocks of Cambrian, Ordovician, and Silurian ages overlie the crystalline rocks. These rocks are divided, in ascending order, as follows: The Dresbach Group, Franconia Sandstone, and Trempealeau Formation of Cambrian age; the Prairie du Chien Group, St. Peter Sandstone, Platteville Formation, and Maquoketa Shale of Ordovician age; and the Niagara Dolomite of Silurian age. The Maquoketa Shale and Niagara Dolomite are present only in the eastern part of the area. Unconsolidated deposits, largely of Pleistocene age and glacial origin, overlie the older rocks in most of the area. The rocks of the Dresbach Group, Franconia Sandstone, Trempealeau Formation, Prairie du Chien Group, and St. Peter Sandstone are connected hydraulically and can be considered to form one aquifer, called the sandstone aquifer. The sandstone aquifer is the principal source of ground-water supply in the Green Bay area and is one of the most productive water-bearing units in Wisconsin. All the public water supplies in the area, except the supply for the city of Green Bay, and many of the industrial water supplies are obtained from wells tapping the sandstone aquifer. Rates of discharge of individual wells range from about 200 to 1,000 gallous per minute. The city of Green Bay also obtained its water supply from wells tapping the sandstone aquifer until August 1957, when it began using Lake Michigan as a source of water supply. Several industries also use large quantities of surface water. The Niagara Dolomite, although largely undeveloped, is potentially an important aquifer, in the eastern part of the area. Small amounts of water are obtained from dolomite of the Platteville Formation and from sand and gravel deposits of Pleistocene age. Recharge to the sandstone aquifer in the Green Bay area is derived chiefly from precipitation that infiltrates at or near the outcrop area of the aquifer in northwestern Brown County, eastern Outagamie and Shawano Counties, and southern Oconto County. The amount of recharge is estimated to be at least 30 mgd (million gallons per day). Withdrawals of water from wells tapping the sandstone aquifer in the area began when the first well was drilled in 1886. The withdrawals gradually increased to an average of about 6 mgd in 1940, about 10 mgd in 1950, and about 13 mgd in January-July of 1957, after which time the city of Green Bay discontinued pumping from wells. From August 1957 through 1960, average annual withdrawals of water remained relatively constant at about 5 mgd. Water levels in wells tapping the sandstone aquifer persistently declined until August 1957 as a result of the gradually increasing withdrawals of water. In the area of concentrated ground-water withdrawals in downtown Green Bay, the piezometric surface, which had been about 100 feet above land surface in 1886, was about 340 feet below land surface in 1957. The cessation of pumping by the city of Green Bay in August 1957 resulted in a decrease in withdrawals of ground water from about 13.1 mgd in the first half of 1957 to about 5.3 mgd in the last half and a rapid recovery in water levels. ]n the area of concentrated withdrawals, the piezometric surface had recovered about 300 feet by September 1960. Rises in water levels were recorded throughout the Green Bay area, with the amount of the rise depending on the distance from the Green Bay city wells. In September 1960, water levels appeared to be affected more by local variations in the rates of pumping than by the recovery resulting from 1957 reduction in pumping. Much additional ground water could

Wisconsin↗
USGS1963

Water in the Dakota and Purgatoire Formations in Otero County and the southern part of Crowley County, Colorado

The hardness of available shallow ground water in Otero County and in the southern part of Crowley County generally exceeds 1,000 parts per million, and the water requires treatment for most uses. To obtain a supply of softer water, wells have been drilled into the Dakota Sandstone and the Cheyenne Sandstone Member of the Purgatoire Formation, both Early Cretaceous in age. These aquifers underlie most of ,the area at depths from 0 to 2,000 feet and have a general regional dip northward into the Denver Basin. More than 50 wells have been drilled into the aquifers in this area to obtain water for stock, domestic, and industrial purposes and for public supply. The aquifers are recharged in areas where they crop out or are overlain by sand, principally to the south and west of Otero County. Because water in the aquifers is generally under pressure, it rises above the top of the aquifer in wells penetrating it; at least 20 wells in the area flow. Yields from wells tapping the aquifers range from 4 to 75 gpm (gallons per minute). Flows as great as 50 gpm have been obtained. Water in the aquifers is commonly soft and of good chemical quality. There appears to be little difference in quality of water from the two aquifers. Most residents and drillers know that soft water can be obtained from wells throughout most of the area described in this report, but many are not aware of certain factors related to the development of this water. This report should be of value in further developing the sources of soft water by showing: (a) The approximate depth of a well needed to tap these supplies, (b) the range in yields that may be expected, (c) the range in chemical quality that may be expected, (d) the depth to which water will rise in wells, and (e) information on the factors affecting the durability of the supply.

Water Supply Paper↗
USGS1964

Ground-water resources of Waupaca County, Wisconsin

Waupaca County is in east-central Wisconsin. No serious ground-water problems existed in 1960 except in a few localities where crystalline rock is near land surface or is covered by nearly impermeable till. The use of ground water for irrigation has not appreciably affected ground-water levels. The county is covered by Pleistocene till, glaciolacustrine (lake), glaciofluvial (stream), and eolian (wind) deposits. In the northern three-quarters of the county these deposits overlie Precambrian crystalline rocks; in the remainder, they overlie sandstone of Cambrian age and, to a minor extent, dolomite of the Prairie du Chien Group of Ordovician age. The deposits of Pleistocene age, particularly outwash, are the principal sources of ground water except in those areas where the saturated thickness is slight or the permeability low. The sandstone of Cambrian age is an important aquifer in the southeastern part of the county. The crystalline rocks of Precambrian age yield little water except from fractures, joints, and weathered zones, and they are a source of water only in areas where better aquifers are absent. Ground water in Waupaca County occurs under both water-table and artesian conditions. The source of this ground water is precipitation that falls on the county and percolates downward to the zone of saturation. Regional movement of ground water is to the Wolf River. In most of the county the direction of movement is eastward or southeastward, except in the southeastern corner of the county, where the movement is westward. Water-level fluctuations reflect the variations of ground-water storage or artesian pressure in response to variations in recharge and discharge. Declining water levels from 1956 to 1959 reflect a period of below-normal precipitation, and rising water levels in late 1959 and 1960 reflect above-normal precipitation. Average precipitation, runoff, and evapotranspiration in 1959 are estimated to be 1,000, 400, and 600 mgd (million gallons per day) respectively. Pumpage in the county was estimated to be about 4 mgd in 1959, and about half of this amount was used for public supplies. A pumping test of a well in outwash deposits near Waupaca indicated that at that point the coefficient of transmissibility is about 100,000 gpd (gallons per day) per ft, the permeability is about 1,000 gpd per sq ft, the coefficient of storage is about 0.2, and the specific capacity is 41 gpm (gallons per minute) per ft of drawdown. These hydraulic characteristics are probably in the same order of magnitude as the characteristics of outwash deposits in the county in general. The water from wells in Waupaca County, although hard and generally containing iron, is good for most purposes.

Wisconsin↗