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Hydrology and Nutrient Enrichment at Two Coastal Lagoon Systems in Northern Greece

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  • Georgios Sylaios
  • Vassiliki Theocharis

Abstract

The lagoons of N.E. Greece, located on the western side of NestosRiver, and of N.W. Greece, located at the lower reaches of Kalamas River, are among the most important shallow, semi-enclosed ecosystems in Northern Greece. The temporal variability of nutrients at both lagoonal systems shows the strong influence of fresh water discharge on water quality. Nutrient enrichment factors showed that nitrites and ammonium were six times higher at the lagoons of N.W. Greece than those observed at N.E. Greece, while phosphates were forty times higherat Nestos River lagoons. The flushing half-life was calculatedbased on a combination of hydrological and tidal processes, foreach lagoon of these two systems, allowing for the assessment ofwater quality changes. Proper management measures for both systems should focus on the control of fresh water quality entering the lagoons, the reduction of phosphoric fertilizers used by agriculture and the better oxygenation of the water column. One way to eliminate massive fish deaths during the winter in N.E. Greece is also the transfer of fresh, warm groundwater, while bathymetric modifications and channel wideningare needed at the lagoons of N.W. Greece. Copyright Kluwer Academic Publishers 2002

Suggested Citation

  • Georgios Sylaios & Vassiliki Theocharis, 2002. "Hydrology and Nutrient Enrichment at Two Coastal Lagoon Systems in Northern Greece," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 16(3), pages 171-196, June.
    • Handle: RePEc:spr:waterr:v:16:y:2002:i:3:p:171-196
    DOI: 10.1023/A:1020278003138
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    Cited by:

    1. Lawrence Kiage & Nan Walker, 2009. "Using NDVI from MODIS to Monitor Duckweed Bloom in Lake Maracaibo, Venezuela," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 23(6), pages 1125-1135, April.
    2. Georgios Sylaios & Nikolaos Stamatis & Argyris Kallianiotis & Pavlos Vidoris, 2005. "Monitoring Water Quality and Assessment of Land-Based Nutrient Loadings and Cycling in Kavala Gulf," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 19(6), pages 713-735, December.

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