, 16:830 | Cite as

Flushing times for the Providence River based on tracer experiments

  • Stephane Asselin
  • Malcolm L. Spaulding


The flushing time of the Providence River was estimated using three different data sets and three different methodologies. Dye concentrations were measured following instantaneous dye releases during wet weather experiments performed by the Narragansett Bay Project between October 1988 and June 1989. These data were analyzed to obtain flushing time estimates. Salinity measurements collected during the Sinbadd (Sampling In Narragansett Bay All During the Day) cruises, Spray (Sampling the Providence River All Year) cruises and wet weather experiments were used with the fraction of fresh water method and box model to calculate flushing time. The Sinbadd cruises performed 4 seasonal surveys at 22 stations in Narragansett Bay during 1986 to obtain a view of the whole Narragansett Bay with respect to the concentrations of nutrients and trace metals. The Spray cruises collected data in the Providence River at 10 stations to determine the relationship of nutrients and trace metals concentrations in the Seekonk and Providence rivers as a function of point source inputs. Based on the flushing time estimates, an exponential relationship between freshwater inflow and flushing time was developed (correlation coefficient of 0.826). The flushing time ranged from 0.8 d at high (90 m3 m−1) freshwater inflows to 4.4 d at low (20 m3 s−1) freshwater inflows. The average flushing time of the Providence River was estimated as 2.5 d for the mean freshwater inflow of 42.3 m3 s−1.

Literature Cited

  1. Asselin, S. 1991. Flushing times in the Providence River based on tracer experiments. Master Thesis. Department of Ocean Engineering. University of Rhode Island. Kingston, Rhode Island. 248 p.Google Scholar
  2. Bendick, J. R. 1989. Polluted shellfish areas in Narragansett Bay. Department of Environmental Management, Division of Water Resources, Providence, Rhode Island. 6 p.Google Scholar
  3. Callaway, R. J. 1981. Flushing study of South Beach marina, Oregon. Journal of the Waterway, Port, Coastal and Ocean Division 207:42–58.Google Scholar
  4. Chinmann, R. A. and S. W. Nixon. 1985. Depth-area-volume relationships in Narragansett Bay. Marine technical report 87. University of Rhode Island, Narragansett, Rhode Island. 64 p.Google Scholar
  5. Dettmann, E. H., F. A. Godshall, and W. A. Brown. 1989. Dissolved oxygen in the Providence River, Narragansett Bay, Rhode Island: An evaluation of the available data base and initial modeling results. Preliminary draft report. Environmental Protection Agency. Narragansett, Rhode Island. 113 p.Google Scholar
  6. Doering, P. H., C. A. Oviatt, and M. E. Q. Pilson. 1988. Monitoring of the Providence and Seekonk rivers for trace metals and associated parameters. Final report. Marine Eco-systems Research Center. Graduate School of Oceanography. University of Rhode Island. Narragansett, Rhode Island. 25 p.Google Scholar
  7. Dyer, K. R. 1973. Estuaries: A Physical Introduction. John Wylie and Sons Ltd., New York. 140 p.Google Scholar
  8. Fischer, H. B., J. List, R. C. Koh, J. Imberger, and N. H. Brooks. 1979. Mixing in Inland and Coastal Waters. Academic Press, Inc., Orlando, Florida. 483 p.Google Scholar
  9. Officer, C. B. 1980. Box model revisited, p. 65–114. In P. Hamilton and R. B. McDonald (eds.), Estuaries and Wetland Processes. Marine Sciences series. Vol. 11. Plenum Press, New York.Google Scholar
  10. Pilson, M. E. Q. 1985. On the residence time of water in Narragansett Bay. Estuaries 8:2–14.CrossRefGoogle Scholar
  11. Pilson, M. E. Q. and C. D. Hunt. 1989. A summary of results from the SINBADD cruises 1985–1986. Marine ecosystems research laboratory. Graduate School of Oceanography. University of Rhode Island. Narragansett, Rhode Island. 65 p.Google Scholar
  12. Schneider, C. 1987. Opening remarks, p. 1–10. Narragansett Bay: Issues, Resources, Status and Management. National Oceanic and Atmospheric Administration. Estuary-of-the-Month. Seminar series no. 1. Providence, Rhode Island.Google Scholar
  13. Spaulding, M. L. 1974. Laterally integrated numerical water quality model for an estuary. Journal of Fluids Engineering 96: 103–110.Google Scholar
  14. Swanson, C. J. and K. Jayko. 1988. A simplified estuarine box model of Narragansett Bay. Applied Sciences Associates, Inc., Project #85-11. Narragansett, Rhode Island. 80 p.Google Scholar
  15. Swanson, C. J. and M. L. Spaulding. 1983. A two-dimensional estuarine numerical water quality model: Application to the Providence River. Applied Sciences Associates Inc., Project #83-8. Narragansett, Rhode Islamd. 52 p.Google Scholar
  16. Takeoka, H. 1984a. Exchange and transport time scales in the Seto Inland Sea. Continental Shelf Research 3:327–341.CrossRefGoogle Scholar
  17. Takeoka, H. 1984b. Fundamental concepts of exchange and transport time scales in a coastal sea. Continental Shelf Research 3:311–326.CrossRefGoogle Scholar
  18. Thomann, R. V. and J. A. Mueller. 1987. Principles of Surface Water Quality Modelling and Control. Harper and Row Publishers Inc., New York. 644 p.Google Scholar
  19. Turner, A. C., S. Asselin, S. Feng, and S. Puckett. 1989. Providence River wet weather dye study data report. Final report. Applied Sciences Associates, Inc., Narragansett, Rhode Island. 46 p.Google Scholar
  20. United States Department of Commerce. 1985. National shellfish register of classified estuarine waters. United States Department of Commerce, Washington, D.C.Google Scholar
  21. Van de Kreeke, J. 1983. Residence time: Application to small boat basins. Journal of Waterway, Port, Coastal and Ocean Engineering 109:416–428.CrossRefGoogle Scholar
  22. Wang, X. and M. L. Spaulding. 1985. A tidal prism flushing model of Narragansett Bay. Department of Ocean Engineering. University of Rhode Island. Kingston, Rhode Island. 24 p.Google Scholar
  23. Wright, R. M. 1990. Problem assessment and source identification and ranking of wet weather discharges entering the Providence and Seekonk rivers. Narragansett Bay Project/United States Environmental Protection Agency, technical completion report #NBP 92-86. Department of Civil Engineering, University of Rhode Island. Kingston, Rhode Island. Vol. 1–5.Google Scholar

Copyright information

© Estuarine Research Federation 1993

Authors and Affiliations

  • Stephane Asselin
    • 1
  • Malcolm L. Spaulding
    • 2
  1. 1.Woodward-Clyde ConsultantsOakland
  2. 2.Department of Ocean EngineeringThe University of Rhode IslandKingston

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