Water Quality Monitoring and Modeling in Lake Kastoria, Using GIS. Assessment and Management of Pollution Sources

摘要: Lake Kastoria, is a very fragile aquatic ecosystem, protected by several national and international conventions, situated in the Region of Western Macedonia, Greece. A monthly monitoring program has been operated Municipality during past 5 years (2002–2007). The water quality parameters monitored, are: Water Temperature (Tw), dissolved oxygen (DO), BOD, COD, pH, conductivity (ECw), redox potential (RP), nitrate nitrogen (NO3-N), nitrite (NO2-N), ammonium (NH4-N) orthophosphates-dissolved inorganic phosphorus (PO4-P-DIP). This study focuses on Tw, DO, NH4-N, NO3-N PO4-P. sampling points are five, scattered specific positions (Sioutista, Xiropotamos, Mavriotissa, Northern Beach Stavros—Southern Beach). comparison took place between two spatial–geographic deterministic simulation algorithms “IDW” “RBF”, using GIS. resulted conclusion that first algorithm most appropriate to formulate equipotential curves selected parameters. Data from seasons (winter—frozen summer—high eutrophication level) 2 years (2005 2006) presented here so compared periods February 2005, July 2006 2006. thematic maps obtained indicate probable sources pollution Kastoria present geographic distribution algorithm. significant drawback missing data influenced extreme events. Therefore, need for daily telemetric suggested, order prevent environmental hazards confront pressures concerning status. Finally, management strategies reduction proposed, combination with systematic real time monitoring, upgrade natural environment Kastoria.