Geology topics

Jeffrey L. Strause

Publications and source records attributed to Jeffrey L. Strause.

4 recordsLinked to original sources

USGS1987

Texas ground-water quality

This report contains summary information on ground-water quality in one of the 50 States, Puerto Rico, the Virgin Islands, or the Trust Territories of the Pacific Islands, Saipan, Guam, and American Samoa. The material is extracted from the manuscript of the 1986 National Water Summary, and with the exception of the illustrations, which will be reproduced in multi-color in the 1986 National Water Summary, the format and content of this report is identical to the State ground-water-quality descriptions to be published in the 1986 National Water Summary. Release of this information before formal publication in the 1986 National Water Summary permits the earliest access by the public.

Texas↗

USGS1983

Water quality of Lake Whitney, north-central Texas

The volume-weighted average concentrations of the major dissolved constituents in Lake Whitney on the Brazos River in north-central Texas usually were less than 1,300 milligrams per liter of dissolved solids, 500 milligrams per liter of chloride, and 300 milligrams per liter of sulfate during the 1970-80 water years. The water was very hard (hardness greater than 180 milligrams per liter as calcium carbonate). The concentrations of principal dissolved constituents varied in relation to releases from Lake Granbury and in relation to runoff from the intervening drainage area. Releases from upstream reservoirs associated with heavy rainfall during August 1978 showed a marked increase in concentrations of all dissolved constituents. Thermal stratification in Lake Whitney usually begins during April and persists until October. Stratification causes significant seasonal and areal variations in the concentration of dissolved oxygen, which cause variations in the concentrations of dissolved iron, dissolved manganese, total inorganic nitrogen, and total phosphorus. Oxygen utilized in the decay of organic matter and bottom material is not replenished during periods of summer stagnation, and water below depths of 40 to 50 feet (12 to 15 meters) usually contains less than 2.0 milligrams per liter of dissolved oxygen. During summer stagnation, reducing conditions result in the dissolution of iron and manganese from the bottom deposits in the lake. At site AC, a deep site near Whitney Darn, dissolved iron concentrations in water near the bottom during summer stagnation ranged from 90 to 400 micrograms per liter and averaged about 195 micrograms per liter. Dissolved manganese concentrations ranged from 240 to 2,100 micrograms per liter and averaged about 1,400 micrograms per liter. During winter circulation and in water near the surface during summer stagnation, both iron and manganese concentrations averaged less than 40 micrograms per liter. The concentrations of total inorganic nitrogen and total phosphorus are greatest during summer stagnation in water near the bottom at deep sites. At site A c during the summer, the concentration of total inorganic nitrogen near the bottom averaged 1.3 milligrams per liter and the concentration of total phosphorus near the bottom averaged 0.28 milligram per liter. During the entire year, the concentration of both these constituents in water near the surface averaged less than 0.05 milligram per liter, with the exception of site P12. Seasonal temperature variations and variations in the concentration of dissolved oxygen result in dissolved iron, dissolved manganese, total inorganic nitrogen, and total phosphorus being recycled within the lake; however, no significant accumulations of these constituents were detected.

Open-File Report↗

USGS1983

Approximate water-level changes in wells in the Chicot and Evangeline aquifers, 1977-83 and 1982-83 and measured compaction, 1973-83 in Harris and Galvestan counties, Texas

This report, which was prepared in cooperation with the City of Hoston, the Harris-Galveston Coastal Subsidence District, and the Texas Department of Water Resources, presents data on water-level changes in the Chicot and Evangeline aquifers.

Open-File Report↗

USGS1982

Water quality of Lake Granbury, north-central Texas

During water years 1970-79, the concentrations of the major dissolved constituents in Lake Granbury on the Brazos River in north-central Texas averaged about 1,800 milligrams per liter of dissolved solids, 700 milligrams per liter of chloride, and 350 milligrams per liter of sulfate. The water was generally very hard (hardness as calcium carbonate greater than 180 milligrams per liter). The concentrations of principal dissolved constituents varied throughout the year in relation to releases from Possum Kingdom Lake and to runoff from the intervening drainage area. Thermal stratification in Lake Granbury usually begins during April and persists until September or October. Stratification causes significant seasonal and areal variations in the concentration of dissolved oxygen, which in turn cause variations in the concentrations of dissolved iron and manganese, total inorganic nitrogen, and total phosphorus. Oxygen Utilized in the decay of organic matter and bottom material is not replenished during periods of summer stagnation, and water below depths of 30 to 40 feet (9 to 12 meters) usually contains less than 1.0 milligram per liter of dissolved oxygen. Variations in the concentrations of dissolved solids are associated with localized inflows. During periods of summer stagnation, reducing conditions result in the dissolution of iron and manganese from the bottom deposits in the lake. At site Ac, a deep site near De Cordova Bend Dam, iron concentrations in water near the bottom during summer stagnation ranged from 50 to 700 micrograms per liter and averaged 230 micrograms per liter. Manganese concentrations ranged from 1,300 to 3,700 micrograms per liter and averaged 1,800 micrograms per liter. During periods of winter circulation and in water near the surface during summer stagnation, both iron and manganese concentrations averaged less than I00 micrograms per liter. The concentrations of total inorganic nitrogen and total phosphorus are greatest during summer stagnation in water near the bottom at deep-water sites. At site A c during the summer, the concentration of total inorganic nitrogen averaged 2.37 milligrams per liter and the concentration of total phosphorus averaged 0.19 milligram per liter. The concentrations of both these constituents in waters near the surface during the entire year and in bottom waters during the winter averaged 0.07 milligram per liter or less. Seasonal-temperature variations and variations in the concentration of dissolved oxygen result in dissolved iron and manganese, total inorganic nitrogen, and total phosphorus being recycled within the lake; however, no significant accumulations of these constituents were detected.

Open-File Report↗