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D.A. Freiwald

Publications and source records attributed to D.A. Freiwald.

5 recordsLinked to original sources
USGS1988

Effects of fluctuating river-pool stages on ground-water levels in the adjacent alluvial aquifer in the lower Arkansas River, Arkansas

The U.S. Geological Survey conducted a study in cooperation with the U.S. Army Corps of Engineers to determine the effect of fluctuating the lower Arkansas River. A network of 41 wells was used to delineate 4 cross sections adjacent to river pools 2 and 5 of the McClellan-Kerr Arkansas River Navigation System to examine groundwater levels at various distances from the river. The hydraulic gradient of water levels in the alluvial aquifer along these cross sections indicates that the river is losing water to the adjacent aquifer. The effect on groundwater levels in the alluvial aquifer caused by pool-stage fluctuations was most pronounced at distances less than about 2 miles from the Arkansas River. At distances greater than about 2 miles, the changes in groundwater levels probably were the result of water levels rising in the aquifer since the heavy summer irrigation withdrawals have ceased. An equation useful for estimating the distribution of head change an aquifer in response to river-pool-stage changes, was applied to the study area to estimate the effect of a 1-foot rise in pool stage on water levels in the adjacent alluvial aquifer after equilibrium conditions have been established. The theoretical head change (rise) in the aquifer was estimated to range from 1-foot at the Arkansas River to 0.57 foot at a distance of 5 miles away from the river. (USGS)

Water-Resources Investigations Report↗
USGS1987

Ground-water levels in Arkansas, spring 1987

Groundwater level measurements were made in 701 observation wells in Arkansas in the spring of 1987. This report contains the water level data presented in tables listed by aquifer; then by county. For each well, the depth to water below land surface and the altitude of the water level for 1987 are shown, along with the net change in water level between 1986 and 1987 and between 1982 and 1987. In addition, the report contains maps showing the average water level changes, by county, between the years 1982 and 1987 for the aquifers in the Quaternary deposits and the Sparta and Memphis Sands. Also shown are water level hydrographs for selected wells completed in the Quarternary deposits and Sparta Sand. The aquifers in the Quarternary deposits and the Sparta and Memphis Sands are important aquifers in eastern and southern Arkansas for agricultural, municipal, and industrial use. Water level data showed an average water level decline of 0.03 ft in the Quaternary deposits of the 24 most heavily irrigated counties of eastern Arkansas and 0.39 ft in the Sparta and Memphis Sands between the years 1982 and 1987. (USGS)

Open-File Report↗
USGS1984

Ground-water resources of Lanfair and Fenner Valleys and vicinity, San Bernardino County, California

Lanfair and Fenner Valleys and vicinity cover about 1,300 square miles in eastern San Bernardino County, California. Average annual precipitation ranges from 3 to 10 inches over the area. Ground water is utilized primarily for stock and domestic purposes, and occurs in the unconsolidated deposits as well as in the highly fractured consolidated rock. Ground-water levels in wells range from 5 to 600 feet below land surface, and well yields range from 3 to 1,200 gallons per minute throughout the study area. Records indicate that water levels are at or near their predevelopment levels. Springs occur along faults and formational contacts and generally discharge less than 5 gallons per minute. Measured ground-water outflow from Lanfair Valley at Piute Spring ranged from 100 to 630 acre-feet per year. Most of the water is of good quality for domestic and stock use. However , water from two wells indicates a concentration of sulfate that is above the recommended limit for drinking water. Water supplies are adequate for present needs. However, large-scale pumping would result in the lowering of the water table and a reduction of the ground water in storage. (USGS)

Water-Resources Investigations Report↗