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Environmental Geology

, Volume 36, Issue 1–2, pp 1–17 | Cite as

The environmental state of freshwater resources in Greece (rivers and lakes)

  • N. T. Skoulikidis
  • I. Bertahas
  • T. Koussouris
Research article

Abstract

 The dominant factor regulating Greek riverine dissolved inorganic solid concentrations is chemical weathering, which depends on catchment climate and petrography. The majority of Greek rivers are moderately polluted and only a few of them show significant human impact and an increase in pollutant concentrations over time. Due to droughts in recent years and anthropogenic influence, the mean annual riverine dissolved solid concentrations exhibit a general interannual increase and significant long-term variations in their intra-annual hydrochemical fluctuations. The shallow Greek lakes are eutrophic, while the deep ones are oligo-mesotrophic. The majority of the lakes are monomictic and show summer thermal stratification, while the shallow ones are characterized by anoxic hypolimnetic conditions. Catchment petrography is not a dominant factor in the composition of lake waters since biochemical processes prevail. The majority of Greek lakes are also moderately polluted and are characterized by phosphorous-limited photosynthesis.

Key words Greek rivers Greek lakes Hydrogeochemistry Intra-annual and interannual hydrochemical variations Flushing Freshwater pollution Eutrophication Biogeochemical processes 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • N. T. Skoulikidis
    • 1
  • I. Bertahas
    • 1
  • T. Koussouris
    • 1
  1. 1.Institute of Inland Waters, National Centre for Marine Research, Ag. Kosmas, Helleniko GR-16604 Athens, Greece Tel.: +30>9829239 · Fax: +30>9811713 · e-mail: nskoul@posidon.ncmr.ariadne-t.grGR

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