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Water-quality assessment of the Illinois River basin, Arkansas

Water-Resources Investigations Report 83-4092

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Abstract

A water-quality assessment was made of Illinois River, Muddy Fork, Spring Creek, and Osage Creek in northwest Arkansas. Data were collected to calibrate and verify steady-state digital, stream, water-quality models. The models were then used to simulate changes in instream diel-minimum dissolved-oxygen resulting from changes in nutrient loading. The city of Fayetteville proposes to divert part of its projected wastewater-treatment plant discharge to Illinois River. Muddy Fork, Spring Creek, and Osage Creek currently received effluent from the cities of Prairie Grove, Springdale, and Rogers, respectively. The diel-minimum dissolved-oxygen standard for each of these streams is 4.0 mg/L under projected loadings. Data collected indicate that none of the four streams meet Arkansas state standards for diel-minimum dissolved oxygen, total phosphorus, and fecal coliform bacteria. Computed dissolved-oxygen deficits indicate that benthal demand is the principal reason for dissolved-oxygen not meeting standards. Model simulations indicate that Spring Creek and Osage Creek can meet dissolved oxygen standards with stringent effluent limits imposed at the inspecting waste water-treatment plants; Muddy Fork and Illinois River can not. (USGS)

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Water-quality assessment of the Illinois River basin, Arkansas
Series title:
Water-Resources Investigations Report
Series number:
83-4092
Edition:
-
Year Published:
1984
Language:
ENGLISH
Publisher:
U.S. Geological Survey,
Description:
435 p. :ill. ;28 cm.