Dissolved oxygen in lower Hudson Estuary: 1978--93
Journal Article
·
· Journal of Environmental Engineering
- Columbia Univ., Palisades, NY (United States). Lamont-Doherty Earth Observatory
- Rensselaer Polytechnic Inst., Troy, NY (United States). Dept. of Earth and Environmental Science
- Univ. of California at San Diego, La Jolla, CA (United States). Scripps Institution of Oceanography
During summer months, dissolved oxygen (DO) concentrations in the lower Hudson estuary were usually lower than atmospheric equilibrium values. Distributions of DO along the axis of the estuary can be described by three general characteristics. Firstly, surface and bottom values lie on a single trend when plotted against salinity. Secondly, maximum DO concentrations were observed 50--75 km upstream of Manhattan at salinities off 5--15 ppt. Thirdly, the lowest DO concentrations were observed near Manhattan, New York, at salinities of 15--25 ppt and vary systematically with freshwater discharge rate. Minimum DO concentrations during times of similar freshwater discharge were substantially lower for water samples collected between 1978 and 1984 than for those collected between 1989 and 1993. These two periods were also distinguished by occurrences of intense phytoplankton blooms that produced supersaturated DO concentrations at salinities of 5--15 ppt for the period of 1989 to 1993. The increase in the minimum DO concentration in the water near Manhattan is probably in response to improved wastewater treatment at Passaic Valley, NJ; North River, NY; and other wastewater-treatment facilities.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 128837
- Journal Information:
- Journal of Environmental Engineering, Journal Name: Journal of Environmental Engineering Journal Issue: 10 Vol. 121; ISSN 0733-9372; ISSN JOEEDU
- Country of Publication:
- United States
- Language:
- English
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