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Title: LAKE VEGORITIS IN GREECE: A PARADIGM OF CLIMATE CHANGE AND MISMANAGEMENT EFFECTS ON ITS QUANTITY AND QUALITY CHARACTERISTICS

Author: V. Z. Antonopoulos and S. K. Gianniou

Year: 2009

Publisher: European Water Resources Association (EWRA)

Description:

Lake Vegoritis is a very important natural impoundment in Greece. The lake has been under a continuous deficit in the water balance since the mid fifties. As a consequence about 65 % of its water has been lost, while the physical, ecological and water quality properties of the lake are influenced as well. The main cause of the quantitative problems is the lack of a proper management plan for its hydrological catchment and the human activities. Temperature and dissolved oxygen are two of the most important water quality parameters of the lake, while evaporation is the most important components of its water balance and is depended on meteorological parameters as air temperature, solar radiation and humidity that in turn are affected from climate change. The mismanagement of water resources and climate change has affected the water temperature distribution,  stratification duration, dissolved oxygen distribution and biological characteristics of the lake in the same manner. Results of these variables in Vegoritis Lake for three different years (1981, 1993 and 2003) show that duration of stratification has extended, the dissolved oxygen depletion in hypolimnion became more intense and the evaporation during summer months was lower.