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Quantification of Water, Salt and Nutrient Exchange Processes at the Mouth of A mediterranean Coastal Lagoon

Environmental Monitoring and Assessment volume 119, pages 275–301 (2006)Cite this article

Abstract

Vassova lagoon is a typical Mediterranean (small, shallow, micro-tidal, well-mixed) coastal lagoon, receiving limited seasonal freshwater inflows from direct precipitation and underground seepage. An intensive study was carried out in order to quantify the mechanisms responsible for the intra-tidal and residual transport of water, salt, nutrients and chlorophyll at the mouth of this lagoon and to assess the lagoon's flushing behavior. Results indicated that although the system is micro-tidal, tidal effects appeared to be the dominant factor for the longitudinal distribution of physical and chemical parameters, while the associated residual flow is also important and serves as a baseline measure of overall circulation. However, analysis of the net longitudinal currents and fluxes of water, salt and nutrients revealed the importance of non-tidal effects (wind effect and precipitation incidents) in the mean tidal transport. It is shown that the Eulerian residual currents transported water and its properties inwards under southern winds, while a seaward transport was induced during precipitation incidents and northern winds. The Stokes drift effect was found an order of magnitude lower than the Eulerian current, directed towards the lagoon, proving the partially-progressive nature of the tide. Nutrients and chlorophyll-α loads are exported from the lagoon to the open sea during the ebb phase of the autumn and winter tidal cycles, associated with the inflow of nutrient-rich freshwater, seeped through the surrounding drainage canal. The reverse transport occurs in spring and early summer, when nutrients enter the lagoon during the flood tidal phase, from the nutrient-rich upper layer of the stratified adjacent sea. Application of a tidal prism model shows that Vassova lagoon has a mean flushing time of 7.5 days, ranging between 4 to 18 days, affected inversely by the tidal oscillation.

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References

  • Aubrey, D. G. and Speer, P. E.: 1985, ‘A study of non-linear tidal propagation in shallow inlet/estuarine systems. Part I: Observations’, Estuarine Coastal & Shelf Science 21, 185–205.

    Article  Google Scholar 

  • Bel Hassen, M.: 2001, ‘Spatial and temporal variability in nutrients and suspended material processing in the Fier d’ Ars Bay (France)’, Estuarine, Coastal & Shelf Science 52, 457–469.

    CAS  Article  Google Scholar 

  • Blanton, J. O. and Andrade, F. A.: 2001, ‘Distortion of tidal currents and the lateral transfer of salt in a shallow coastal plain estuary (O Estuario do Mira, Portugal)’, Estuaries 24, 467–480.

    CAS  Google Scholar 

  • Comin, F. A.: 1982, ‘Seasonal changes of phytoplankton in three coastal lagoons of the Ebro delta in relation to environmental factors’, Oceanologica Acta, Vol. Suppl., Actes Symposium International sur les Lagunes Cotieres, SCOR/IABO/UNESCO, 259–267.

  • Dame, R. F., Spurrier, J. D., Williams, T. M., Kjerfve, B., Zingmark, R. G., Wolover, T. G., Chrzanowki, T. H., McKeller, H. and Vernberg, F. J.: 1991, ‘Annual material processing by a salt marsh-estuarine basin in South Carolina’, Marine Ecology Progress Series 72, 153–166.

    Google Scholar 

  • Dyer, K. R.: 1974, ‘The salt balance in stratified estuaries’, Estuarine, Coastal & Shelf Science 2, 273–281.

    CAS  Article  Google Scholar 

  • Dyer, K. R. and King, H. L.: 1975, ‘The residual water flow through the Solent, Southern England’, The Geophysical Journal of the Royal Astrophysical Society 42, 97–106.

    Google Scholar 

  • Dyke, P. P. G.: 1980, ‘On the Stoke's drift induced by tidal motions in a wide estuary’. Estuarine, Coastal and Shelf Science 11, 17–25.

    Google Scholar 

  • Fischer, H. B.: 1976, ‘Mixing and dispersion in estuaries’, Annual Review of Fluid Mechanics 8, 107–133.

    Article  Google Scholar 

  • Gordo, L. S. and Cabral, H. N.: 2001, ‘The fish assemblage structure of a hydrologically altered coastal lagoon: the Obidos (Portugal)’, Hydrobiologia 459, 125–133.

    Article  Google Scholar 

  • Grasshoff, K.: 1983, Methods of Seawater Analysis, Verlag Chemie Gmbh, Weinheim.

    Google Scholar 

  • Hansen, D. V. and Rattray, M.: 1966, ‘New dimensions in estuary classification’, Limnology and Oceanography 11, 319–326.

    Google Scholar 

  • Hearn, C. J. and Robson, B. J.: 2002, ‘On the effects of wind and tides on the hydrodynamics of a shallow Mediterranean estuary’, Continental Shelf Research 22, 2655–2672.

    Article  Google Scholar 

  • Hunter, J. R.: 1972, An Investigation into the Circulation of the Irish Sea. Oceanography Report 72-1. Marine Sciences Laboratory, University College of North Wales, Menai Bridge, U.K.

  • Jay, D. A. and Smith D. J.: 1990, ‘Residual circulation in shallow estuaries. 1. Highly stratified, narrow estuaries’, Journal of Geophysical Research 95, 711–731.

    Article  Google Scholar 

  • Kjerfve, B.: 1986, ‘Circulation and salt flux in a well mixed estuary’, in: van der Kreeke, J. (ed.), Physics of Shallow Estuaries and Bays, Springer Verlag, New York, pp. 22–29.

    Google Scholar 

  • Kjerfve, B., Schettini, C. A. F., Knoppers, B., Lessa, G. and Ferreira H. O.: 1996, ‘Hydrology and salt balance in a large, hypersaline coastal lagoon: Lagoa de Araruama, Brazil’, Estuarine, Coastal & Shelf Science 42, 701–725.

    CAS  Article  Google Scholar 

  • Koutitonsky, V. G., Navarro, N. and Booth, D.: 2002, ‘Descriptive physical oceanography of Great-Entry Lagoon, Gulf of St. Lawrence’, Estuarine, Coastal & Shelf Science 54, 833–847.

    CAS  Article  Google Scholar 

  • Lewis, R. E. and Lewis J. O.: 1983, ‘The principal factors contributing to the flux of salt in a narrow, partially stratified estuary’, Estuarine, Coastal & Shelf Science 16, 599–626.

    Article  Google Scholar 

  • Luketina, D.: 1998, ‘Simple tidal prism models revisited’, Estuarine, Coastal & Shelf Science 46, 77–84.

    Article  Google Scholar 

  • Mentoza-Salgado, R. A., Lechuga-Deveze, C. H. and Ortega-Rubio, A.: 2005, ‘Identifying rainfall effects in an arid Gulf of California coastal lagoon’, Journal of Environmental Management 75, 183–187.

    Article  CAS  Google Scholar 

  • Newton, A. and Mudge, S. M.: 2005, ‘Lagoon-sea exchanges, nutrient dynamics and water quality management of the Ria Formosa (Portugal)’, Estuarine, Coastal & Shelf Science 62, 405–414.

    CAS  Article  Google Scholar 

  • Orfanidis, S., Panayotidis, P. and Stamatis, N.: 2001, ‘Ecological evaluation of transitional and coastal waters: A marine benthic macrophytes-based model’, Mediterranean Marine Science 2, 45–65.

    Google Scholar 

  • Park, J. K. and James, A.: 1990, ‘Mass flux estimation and mass transport mechanism in estuaries’, Limnology and Oceanography 35, 1301–1313.

    CAS  Article  Google Scholar 

  • Parsons, T. R., Maita, Y. and Lalli, C. M.: 1984, A Manual of Chemical and Biological Methods for Seawater Analysis. Pergamon Press, New York, 510 p.

    Google Scholar 

  • Pereira-Filho, J., Schettini, C. A. F., Rorig, L. and Siegle, E.: 2001, ‘Intratidal variation and net transport of dissolved inorganic nutrients, POC and chlorophyll-α in the Camboriu River Estuary, Brazil’, Estuarine, Coastal & Shelf Science 53, 249–257.

    CAS  Article  Google Scholar 

  • Ranasinghe, R. and Pattiaratchi, C.: 2000, ‘Tidal inlet asymmetry in diurnal regimes’, Continental Shelf Research 20, 2347–2366.

    Article  Google Scholar 

  • Sanford, L. P., Boicourt, W. C. and Rives, S. R.: 1992, ‘Model for estimating tidal flushing of small embayments’, ASCE Journal of Waterway, Port, Coastal and Ocean Engineering 118, 635–655.

    Google Scholar 

  • Simpson, J. H., Vennel, R. and Souza, A. J.: 2001, ‘The salt fluxes in a tidally-energetic estuary’, Estuarine, Coastal & Shelf Science 52, 131–142.

    CAS  Article  Google Scholar 

  • Sylaios, G. and Boxall, S. R.: 1998, ‘Residual currents and flux estimates in a partially-mixed estuary’, Estuarine, Coastal & Shelf Science 46, 671–682.

    Article  Google Scholar 

  • Sylaios, G. and Theocharis, V.: 2002, ‘Hydrology and nutrient enrichment at two coastal lagoon systems in northern Greece’, Water Resources Management 16, 171–196.

    Article  Google Scholar 

  • Sylaios, G. and Koutroumanidis, T.: 2002, ‘A theoretical approach for the domestic and rural impact on the water quality of coastal lagoons’, New Medit 1, 9–13.

    Google Scholar 

  • Tee, K. T.: 1976, ‘Tide-induced residual current, a 2-D non-linear numerical mode’, Journal of Marine Research 34, 603–628.

    Google Scholar 

  • Theocharis, V., Sylaios, G. and Stamatis, N.: 2000, ‘Water quality variability at two coastal lagoons in Northern Greece’, Fresenius Environmental Bulletin 9, 30–35.

    CAS  Google Scholar 

  • Uncles, R. J. and Jordan, M. B.: 1979, ‘Residual fluxes of water and salt at two stations in the Severn Estuary’, Estuarine and Coastal Marine Science 9, 287–302.

    Article  Google Scholar 

  • Uncles, R. J. and Lewis, R. E.: 2001, ‘The transport of fresh water from river to coastal zone through a temperate estuary’, Journal of Sea Research 46, 161–175.

    Article  Google Scholar 

  • Uncles, R. J., Elliott, R. C. A., Weston, S. A., Pilgrim, D. A., Ackroyd, D. R., McMillan, D. J. and Lynn, N. M.: 1986, ‘Synoptic observations of salinity, suspended sediments and vertical current structure in a partially-mixed estuary’, in: van der Kreeke, J. (ed.), Physics of Shallow Estuaries and Bays. Springer Verlag, New York, pp. 58–70.

    Google Scholar 

  • van der Kreeke, J.: 1976, ‘Tide-induced mass transport: A flushing mechanism of shallow lagoons’, Journal of Hydraulic Research 14, 61–67.

    Article  Google Scholar 

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Affiliations

  1. NAGREF, Fisheries Research Institute, 64007 Nea Peramos, Kavala, Greece

    Georgios K. Sylaios

  2. Laboratory of Ecological Engineering & Technology, Department of Environmental Engineering, Democritus University of Thrace, 67100, Xanthi, Greece

    Georgios K. Sylaios, Vassilios A. Tsihrintzis, Christos Akratos & Kiriaki Haralambidou

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  1. Georgios K. Sylaios
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  2. Vassilios A. Tsihrintzis
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  3. Christos Akratos
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  4. Kiriaki Haralambidou
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Correspondence to Georgios K. Sylaios.

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Sylaios, G.K., Tsihrintzis, V.A., Akratos, C. et al. Quantification of Water, Salt and Nutrient Exchange Processes at the Mouth of A mediterranean Coastal Lagoon. Environ Monit Assess 119, 275–301 (2006). https://doi.org/10.1007/s10661-005-9026-3

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  • DOI: https://doi.org/10.1007/s10661-005-9026-3

Keywords

  • residual currents
  • Stokes drift
  • water balance
  • salt balance
  • nutrients
  • flushing time
  • Vassova Lagoon