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Characteristics of low-slope streams that affect O2 transfer rates

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Abstract

Multiple-regression techniques were used to derive the reaeration coefficients estimating equation for low sloped streams: K2 = 3.83 MBAS-0.41 SL0.20 H-0.76, where K2 is the reaeration coefficient in base e units per day; MBAS is the methylene blue active substances concentration in milligrams per liter; SL is the water-surface slope in foot per foot; and H is the mean-flow depth in feet. Fourteen hydraulic, physical, and water-quality characteristics were regressed against 29 measured-reaeration coefficients for low-sloped (water surface slopes less than 0.002 foot per foot) streams in Massachusetts and New York. Reaeration coefficients measured from May 1985 to October 1988 ranged from 0.2 to 11.0 base e units per day for 29 low-sloped tracer studies. Concentration of methylene blue active substances is significant because it is thought to be an indicator of concentration of surfactants which could change the surface tension at the air-water interface.

Additional Publication Details

Publication type:
Conference Paper
Publication Subtype:
Conference Paper
Title:
Characteristics of low-slope streams that affect O2 transfer rates
ISBN:
0872628469
Year Published:
1991
Language:
English
Publisher:
Publ by ASCE
Publisher location:
New York, NY, United States
First page:
362
Last page:
377
Number of Pages:
16
Conference Title:
2nd International Symposium on Gas Transfer at Water Surfaces
Conference Location:
Minneapolis, MN, USA
Conference Date:
11 September 1990 through 14 September 1990