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Establishing Total Phosphorus Boundaries to Support Good Ecological Status of Greek Lakes and Reservoirs in Accordance with the Water Framework Directive
(2025-11-24)
M. Zioga
;
D. Kemitzoglou
;
I. Zerva
;
S. Katsavouni
;
I.Kagalou
Eutrophication, driven by nutrient enrichment, represents substantial anthropogenic pressure with harmful consequences for aquatic ecosystems. TheWater Framework Directive provides a structured approach to addressing this challenge as it requires European Union Member States to achieve at least good ecological status for their surface waters. The establishment of realistic nutrient boundaries, above which negative effects become pronounced, is essential to guide regulatory intervention aimed at securing long-term water sustainability in Europe. Greece is one of the Member States which should determine nutrient boundaries supporting the good ecological status of lakes. Two statistical approaches, ranged major axis regression and binomial logistic regression, were applied for setting appropriate nutrient boundaries for Greek natural lakes and reservoirs, using datasets of phytoplankton and total phosphorus concentrations, retrieved from the national monitoring program (2016–2023). The predicted boundary values for total phosphorus supporting good ecological status ranged from 32 to 76 μg/L, with stricter boundaries corresponding to deep lakes. Nutrient boundaries that reflect the environmental pressures on Greek natural lakes and reservoirs are fundamental to ensure proper design of lake management strategies.
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Water quality of Greek reservoirs: the impact of land cover and water resources management on phytoplankton. Paper presented at 11th World Congress on Water Resources and Environment (EWRA 2019) “Managing Water Resources for a Sustainable Future”. Madrid, Spain, 25-29 June 2019
(2019-07-04)
V. Navrozidou
;
A. Apostolakis
;
S. Katsavouni
;
E. Mavromati
;
V. Tsiaoussi
Natural and artificial lakes (reservoirs) are ecosystems of major importance; however, environmental pressures such as eutrophication, global warming and overexploitation of water resources put a pressure on them (Gaglio et al. 2017). Phytoplankton is an important element of aquatic ecosystems and a significant indicator of water quality as it responds directly to eutrophication pressure (Hajnal and Padisák 2008). The objectives of this study are: i) to present recent data on phytoplankton communities of Greek reservoirs; and ii) to investigate their correlation with land cover of river basin and water resources management.
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Drought Vulnerability Index (DVI) in Attica Region, Greece using climate models upon the climate scenarios A1B and A2. ORIENTGATE Technical Report
(Greek Biotope/Wetland Centre (EKBY), 2017-03-08)
D. Papadimos
;
S. Katsavouni
The study was commissioned within the preparation of the River Basin Management Plan of Attica Water District (Ministry of Environment 2013). Its main purpose was to: a) quantify the effects of drought and water shortage in the water district of Attica, b) to examine possible methodologies for predicting future incidents and c) to propose remedies for various levels of risk. This essay aims to strengthen the effectiveness of the above "Drought and Water shortage Management Plan" of the Attica Water District, by enhancing the forecasting process of future drought incidents.
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Natural systems for wastewater treatment and reuse (Ecos-Ouverture): Final report
(Greek Biotope/Wetland Centre (EKBY), 2014-04-29)
E.T. Anastasiadis
;
S. Katsavouni

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