Estuaries and Coasts

, Volume 41, Issue 6, pp 1587–1600 | Cite as

Impact of Channel Deepening on Tidal and Gravitational Circulation in a Highly Engineered Estuarine Basin

  • Robert J. Chant
  • Christopher K. Sommerfield
  • Stefan A. Talke


Deepening of estuarine channels is a common practice to ensure navigation. Here, we investigate whether such deepening impacts physical processes such as the strength of the estuarine exchange flow, the horizontal salinity gradient, and tidal dynamics. We analyze recent and historical hydrodynamic observations in Newark Bay, New Jersey, to assess the effect of channel deepening on tides, circulation, and salinity. The Bay’s navigational channel has undergone significant deepening, from 3 to 10 m in the nineteenth century to ~16 m today. Observations presented here include sea-level data from the nineteenth, twentieth, and twenty-first century, and moored Doppler current data and bottom salinity measurements made over the past 20 years. Results show a doubling of the estuarine exchange flow, a slight increase in salinity and in the horizontal salinity gradient, a decrease in tidal current amplitude, and a spatially variable change in the tidal range. The doubling of the exchange flow is consistent with the Hansen and Rattray scaling provided that the horizontal salinity gradient is unable to fully adjust landward because the dredging is limited to a short reach of the estuary. However, uncertainty in channel depth leaves open the possibility that the exchange flow is also augmented by an increase in the horizontal salinity gradient and/or a reduction in vertical mixing. Nevertheless, results demonstrate that a relatively small (15%) increase in depth appears to have doubled the exchange flow. We believe that this result is relevant to other systems where dredging is limited to a short reach of an estuary.


Estuarine exchange flow Channel deepening Estuarine salt intrusion 



RJC acknowledges support from the Hudson River Foundation (HRF008/07A) and from a National Science Foundation Coastal SEES grant (1325258). CKS acknowledges support from the Hudson River Foundation (HRF008/07A) and the National Science Foundation (OCE-1325102). Stefan Talke acknowledges the U.S. Army Corps of Engineers (Award W1927N-14-2-0015) and the US National Science Foundation (Career Award 1455350). We thank Chip Haldeman and Elias Hunter for their efforts in the field, and Capt. Ken Roma for his efforts behind the helm. The authors gratefully thank two anonymous reviewers whose thoughtful comment and constructive criticisms of earlier drafts greatly improved this paper.


  1. Amin, M. 1983. On perturbations of harmonic constants in the Thames Estuary. Geophysical Journal International 73 (3): 587–603.CrossRefGoogle Scholar
  2. Bale, A., R. Uncles, A. Villena-Lincoln, and J. Widdows. 2007. An assessment of the potential impact of dredging activity on the Tamar Estuary over the last century: bathymetric and hydrodynamic changes. Hydrobiologia 588 (1): 83–95.CrossRefGoogle Scholar
  3. Chant, R.J. 2002. Secondary flows in a region of flow curvature: relationship with tidal forcing and river discharge. Journal of Geophysical Research (C Oceans) 107 (21 September).
  4. Chant, R.J. 2006. Hydrodynamics of the Newark Bay/Kills system. New Brunswick: Rutgers University, Institute of Marine and Coastal Sciences.Google Scholar
  5. Chant, R.J., D. Fugate, and E. Garvey. 2011. The shaping of an estuarine superfund site: Roles of evolving dynamics and geomorphology. Estuaries and Coasts 34: 90–105.Google Scholar
  6. Chernetsky, A.S., H.M. Schuttelaars, and S.A. Talke. 2010. The effect of tidal asymmetry and temporal settling lag on sediment trapping in tidal estuaries. Ocean Dynamics 60 (5): 1219–1241.CrossRefGoogle Scholar
  7. de Jonge, V.N., H.M. Schuttelaars, J.E. van Beusekom, S.A. Talke, and H.E. de Swart. 2014. The influence of channel deepening on estuarine turbidity levels and dynamics, as exemplified by the Ems estuary. Estuarine, Coastal and Shelf Science 139: 46–59.CrossRefGoogle Scholar
  8. Devlin, A.T., D.A. Jay, S.A. Talke, and E. Zaron. 2014. Can tidal perturbations associated with sea level variations in the western Pacific Ocean be used to understand future effects of tidal evolution? Ocean Dynamics 64: 1093–120.Google Scholar
  9. DiLorenzo, J.L., P. Huang, M.L. Thatcher, and T.O. Najarian. 1993. Dredging impacts on Delaware Estuary tides. Presented at Proceedings of the 3rd International Conference on Estuarine and Coastal Modeling III.Google Scholar
  10. Doodson, A.T., and H.D. Warburg. 1941. Admiralty manual of tides. HM Stationery Office.Google Scholar
  11. Familkhalili, R., and S. Talke. 2016. The effect of channel deepening on tides and storm surge: a case study of Wilmington, NC. Geophysical Research Letters 43 (17): 9138–9147.CrossRefGoogle Scholar
  12. Friedrichs, C.T. 2010. Barotropic tides in channelized estuaries. Contemporary Issues in Estuarine Physics: 27–61.Google Scholar
  13. Hansen, D.V., and M.J. Rattray. 1965. Gravitational circulation in straits and estuaries. Journal of Marine Research 23 (2): 104–122.Google Scholar
  14. Huntley, S.L., R.J. Wenning, S.H. Su, N.L. Bonnevie, and D.J. Paustenbach. 1995. Geochronology and sedimentology of the lower Passaic River, New Jersey. Estuaries 18 (2): 351–361.CrossRefGoogle Scholar
  15. Jay, D.A., and J.D. Musiak. 1994. Particle trapping in estuarine tidal flows. Journal of Geophysical Research: Oceans 99 (C10): 20445–20461.CrossRefGoogle Scholar
  16. Lane, A. 2004. Bathymetric evolution of the Mersey Estuary, UK, 1906–1997: causes and effects. Estuarine, Coastal and Shelf Science 59 (2): 249–263.CrossRefGoogle Scholar
  17. Lerczak, J.A., W.R. Geyer, and R.J. Chant. 2006. Mechanisms driving the time-dependent salt flux in a partially stratified estuary. Journal of Physical Oceanography 36 (12): 2296–2311.CrossRefGoogle Scholar
  18. Linden, P., and J. Simpson. 1988. Modulated mixing and frontogenesis in shallow seas and estuaries. Continental Shelf Research 8 (10): 1107–1127.CrossRefGoogle Scholar
  19. MacCready, P., and W.R. Geyer. 2010. Advances in estuarine physics. Annual Review of Marine Science 2 (1): 35–58.CrossRefGoogle Scholar
  20. Marmer, H.A. 1935. Tides and currents in New York harbor. US Government Printing Office.Google Scholar
  21. Meyers, S.D., A.J. Linville, and M.E. Luther. 2014. Alteration of residual circulation due to large-scale infrastructure in a coastal plain estuary. Estuaries and Coasts 37 (2): 493–507.CrossRefGoogle Scholar
  22. Munk, W.H., and D.E. Cartwright. 1966. Tidal spectroscopy and prediction. Philosophical Transactions of the Royal Society of London. Series A 259: 533-81.Google Scholar
  23. Officer CB. 1976. Physical oceanography of estuaries and associated coastal waters. In Physical oceanography of estuaries and associated coastal waters. John Wiley.Google Scholar
  24. Pecchioli, J.A., M.S. Bruno, R.J. Chant, A.M. Pence, A.F. Blumberg, D. Fugate, B.J. Fullerton, S. Glenn, C. Haldeman, and E. Hunter et al. 2006. The New Jersey Toxics Reduction Workplan for New York—New Jersey Harbor: Study I–E—Hydrodynamic Studies in the Newark Bay Complex, 10. Trenton, NJ: New Jersey Environmental Department.Google Scholar
  25. Prandle, D. 2003. Relationships between tidal dynamics and bathymetry in strongly convergent estuaries. Journal of Physical Oceanography 33 (12): 2738–2750.CrossRefGoogle Scholar
  26. Pritchard D.W. 1956. The dynamic structure of a coastal plain estuary. Journal of Marine Research 15: 33–42.Google Scholar
  27. Talke, S.A., and D.A. Jay. 2017. Archival water-level measurements: Recovering historical data to help design for the future. US Army Corps of Engineers: Civil Works Technical Series, Report CWTS-02, p. 50.Google Scholar
  28. Talke, S.A., H.E. de Swart, and V. De Jonge. 2009a. An idealized model and systematic process study of oxygen depletion in highly turbid estuaries. Estuaries and Coasts 32 (4): 602–620.CrossRefGoogle Scholar
  29. Talke, S.A., H.E. de Swart, and H. Schuttelaars. 2009b. Feedback between residual circulations and sediment distribution in highly turbid estuaries: an analytical model. Continental Shelf Research 29 (1): 119–135.CrossRefGoogle Scholar
  30. Talke, S.A., P. Orton, and D.A. Jay. 2014. Increasing storm tides in New York Harbor, 1844–2013. Geophysical Research Letters 41 (9): 3149–3155.CrossRefGoogle Scholar
  31. US Army Corp of Engineers (USACE). 1915. Index to the reports of the Chief of Engineers, U.S.Army, 1866-1912, Volume 1. Washington D.C.:Government Printing Office.Google Scholar
  32. Wenning, R., N. Bonnevie, and S. Huntley. 1994. Accumulation of metals, polychlorinated biphenyls, and polycyclic aromatic hydrocarbons in sediments from the lower Passaic River, New Jersey. Archives of Environmental Contamination and Toxicology 27: 64–81.CrossRefGoogle Scholar
  33. Winterwerp, J.C. 2011. Fine sediment transport by tidal asymmetry in the high-concentrated Ems River: indications for a regime shift in response to channel deepening. Ocean Dynamics 61 (2-3): 203–215.CrossRefGoogle Scholar
  34. Yuan, R., and J. Zhu. 2015. The effects of dredging on tidal range and saltwater intrusion in the Pearl River Estuary. Journal of Coastal Research 31: 1357–1362.CrossRefGoogle Scholar
  35. Zhang, E., H.H.G. Savenije, H. Wu, Y. Kong, and J. Zhu. 2011. Analytical solution for salt intrusion in the Yangtze Estuary, China. Estuarine, Coastal and Shelf Science 91 (4): 492–501.CrossRefGoogle Scholar
  36. Zhu, J., R.H. Weisberg, L. Zheng, and S. Han. 2015. Influences of channel deepening and widening on the tidal and nontidal circulations of Tampa Bay. Estuaries and Coasts 38 (1): 132–150.CrossRefGoogle Scholar

Copyright information

© Coastal and Estuarine Research Federation 2018

Authors and Affiliations

  1. 1.Department of Marine and Coastal SciencesRutgers UniversityNew BrunswickUSA
  2. 2.School of Marine Science and PolicyUniversity of DelawareNewarkUSA
  3. 3.Department of Civil and Environmental EngineeringPortland State UniversityOregonUSA

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