Water-quality assessment of White River between Lake Sequoyah and Beaver Reservoir, Washington County, Arkansas

Terry, J. E.; Morris, E. E.; Bryant, C. T.

Abstract:

The Arkansas Department of Pollution Control and Ecology and U.S. Geological Survey conducted a water quality assessment be made of the White River and, that a steady-state digital model be calibrated and used as a tool for simulating changes in nutrient loading. The city of Fayetteville ‘s wastewater-treatment plant is the only point-source discharger of waste effluent to the river. Data collected during synoptic surveys downstream from the wastewater-treatment plan indicate that temperature, dissolved oxygen, dissolved solids, un-ionized ammonia, total phosphorus, and floating solids and depositable materials did not meet Arkansas stream standards. Nutrient loadings below the treatment plant result in dissolved oxygen concentrations as low as 0.0 milligrams per liter. Biological surveys found low macroinvertebrate organism diversity and numerous dead fish. Computed dissolved oxygen deficits indicate that benthic demands are the most significant oxygen sinks in the river downstream from the wastewater-treatment plant. Benthic oxygen demands range from 2.8 to 11.0 grams per meter squared per day. Model projections indicate that for 7-day, 10-year low-flow conditions and water temperature of 29 degrees Celsius, daily average dissolved oxygen concentrations of 6.0 milligrams per liter can be maintained downstream from the wastewater-treatment plant if effluent concentrations of ultimate carbonaceous biochemical oxygen demand and ammonia nitrogen are 7.5 (5.0 5-day demand) and 2 milligrams per liter respectively. Model sensitivity analysis indicate that dissolved oxygen concentrations were most sensitive to changes in stream temperature. (USGS)

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USGS Numbered Series

ProdID:

30095

Citation Author:

Terry, J. E.; Morris, E. E.; Bryant, C. T.

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ENGLISH

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113 p. :ill., map ;28 cm.

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U.S. Geological Survey,

Citation Series:

Water-Resources Investigations Report

Citation Series Code:

WRI

Citation Series Number:

82-4063

Citation Search Results Text:

Water-quality assessment of White River between Lake Sequoyah and Beaver Reservoir, Washington County, Arkansas; 1982; WRI; 82-4063; Terry, J. E.; Morris, E. E.; Bryant, C. T.

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1982

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citation/reference

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Water-quality assessment of White River between Lake Sequoyah and Beaver Reservoir, Washington County, Arkansas; 1982; WRI; 82-4063; Terry, J. E.; Morris, E. E.; Bryant, C. T.