Catalog Search Results
Author
Series
Water-resources investigations report volume 01-4016
Pub. Date
2001
Language
English
Formats
Author
Series
Pub. Date
1977
Language
English
Formats
Description
For nearly half a century the Willamette River in Oregon experienced severe dissolved-oxygen problems related to large loads of organically rich waste waters from industries and municipalities. Since the mid-1950's dissolved oxygen quality has gradually improved owing to low-flow augmentation, the achievement of basinwide secondary treatment, and the use of other waste-management practices. As a result, summer dissolved-oxygen levels have increased,...
Author
Series
Water-resources investigations report volume 96-4222
Pub. Date
1997
Language
English
Formats
Author
Publisher
University of Akron Press
Pub. Date
2000
Language
English
Description
During the 1960s, inland bodies of water in North America and Europe experienced a dangerous transformation. Nutrients were dumped into the lakes, causing chain reactions which severely impacted on lake environments. The excessive increase into inland waters through human activity, known as cultural eutrofication, emerged as a dominant problem. Massive algae blooms drifted in overnourished lakes, depleting oxygen, damaging fish stocks, and transforming...
Author
Series
Water-resources investigations report volume 93-4087
Publisher
U.S. Geological Survey
Pub. Date
1993
Language
English
Formats
10) User manual for two-dimensional multi-class phytoplankton model with internal nutrient pool kinetics
Author
Publisher
Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency
Pub. Date
[1986]
Language
English
Series
Special symposia volume 1
Publisher
American Society of Limnology and Oceanography
Pub. Date
1972
Language
English
Author
Series
Water-resources investigations report volume 97-4059
Pub. Date
1997
Language
English
Formats
Author
Series
Water-resources investigations report volume 96-4096
Pub. Date
1996
Language
English
Formats
Author
Series
Research reporting series. 3 Ecological research volume EPA-600/3-76-041
Publisher
U.S. Environmental Protection Agency, Office of Research and Development, Corvallis Environmental Research Laboratory
Pub. Date
1976.
Language
English
Author
Series
Research reporting series. 3 Ecological research volume EPA-600/3-81-014
Publisher
Corvallis Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency
Pub. Date
1981.
Language
English
Description
Artificial circulation and hypolimnetic aeration are management techniques for oxygenating eutrophic lakes subject to water quality problems, algal blooms, and fishkills. Artificial circulation is achieved by injecting diffused air into lower waters, by mechanical pumping of water from one depth stratum to another, or by inducing turbulence at the surface using large axial-flow pumps. In contrast, hypolimnetic aeration by air or oxygen injection affects...
Author
Series
Technical bulletin volume no. 1515
Publisher
U.S. Dept. of Agriculture
Pub. Date
1976
Language
English