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5 Rivers and Estuaries: A Hudson Perspective by Richard F. Bopp...
Pages 49-66

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From page 49...
... State and city efforts, policy and regulatory considerations, and active participation of environmental groups such as Natural Resources Defense Council and Environmental Defense Fund add to the challenge of arriving at a holistic approach. It seems that a logical initial step in this direction involves a consideration of research needs and directions.
From page 50...
... Flow and suspended matter concentration data were from We USGS monitoring station at Stillwater, NY (USGS, 1984)
From page 51...
... In the Hudson, analyses of dated sediment cores have helped to define the response time of the system to pollution events (Figure 5.3) , to assess the contribution of contaminants from New York Metropolitan Area sewage treatment plants, and to quantify the improvements in levels of chlorinated hydrocarbons that were banned in the 1970s (Figure 5.4)
From page 52...
... The two daily suspended-matter monitoring stations are located upstream of the Federal Dam. Locations of sediment core samples are given in mile points (mp)
From page 53...
... 00 Go 8 ~ ~ x x, \ x Xy X~ ~x' 0 -1.65 x x -1.7 I N.Y. HARB OR FIGURE 5.4 Chronologies of chlordane and DDT-derived compound levels accumulating in New York Harbor.
From page 55...
... Levels of particle-associated contaminants, combined with a knowledge of the time of deposition or transport, can be a powerful tracer of net particle transport. This is most important in estuaries where direct determination of net particle transport is extremely difficult, since it generally is a relatively small difference between two large numbers, downstream transport with ebbing currents and upstream with the flood.
From page 56...
... 10 15 t_1 _' I , 32 48 core 188.5 collected July 1983 64! core 188.6 collected May 1991 FIGURE 5.7 Depth profiles of Cs-137 activities in sediment cores collected at the same site in the upper Hudson River.
From page 57...
... Researchers at the Lamont-Doherty Geological Observatory and the Institute for Ecosystems Studies have worked on nutrient dynamics. The USGS National Water Quality Assessment program on the Hudson will include nutrient monitoring, and the Harbor Estuary Program is considering historical nutrient data and future research directions.
From page 58...
... versus salinity for the lower Hudson River. Many transects show the major input at mid salinities associated with New York Metropolitan Area wastewater discharge and quasi-conservative mixing with coastal ocean and fresh water endmembers.
From page 59...
... For example, the New York City Department of Environmental Protection has regular cruises on the lower Hudson for the purpose of collecting water column and sediment-monitoring data. Participation of research scientists would make more efficient use of the ship time, broaden the data base, and help with data interpretation.
From page 60...
... 60 Environmental Science in the Coastal Zone New York County Scale p`-J:t ,-e' ~ Bronx County O Miles ~ ~ ~at C;unty ~ it;=: ~ ,: FIGURE 5.9 A map showing landfi~led areas in New York City.
From page 61...
... In the Savannah River estuary, (Olsen et al., 1989) utilized plutonium isotopic ratios and C-13 abundance in organic matter to study the importance of onshore particle transport, elaborating on an earlier study of Goldberg et al.
From page 62...
... FIGURE 5.10 Levels of freons dissolved in Hudson River water plotted versus salinity. The midsalinity peak has been associated with inputs from New York Metropolitan Area wastewater discharges into New York Harbor.
From page 63...
... Much higher ratios in the offshore samples have been interpreted as the result of atmospheric inputs of fresh DDT. pp'-DDT pp'DDD ESTUARY SAMPLES Suspended Particles Sediment Cores Sewage Samples SLOPE SAMPLES Aerobic Sediments Trap Samples 0.11-0.63 0.05-0.
From page 64...
... and deep (D) suspended particles from the coastal ocean near the mouth of the Hudson.
From page 65...
... l991b. Chronologies of persistent contaminants in New York Harbor, Raritan Bay and Jamaica Bay, Abstract, Estuarine Research Federation Conference, San Francisco, CA, Nov.
From page 66...
... l991b. Reconnaissance mapping of land fills in New York City, in Proceedings of FOCUS Conference on Eastern Regional Ground Water Issues, National Ground Water Association, Portland, ME, October 29-31, 1991.


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