Aristotele University of Thessaloniki Key Persons Greek part Yannis Mylopoulos, Prof., Dr., Project manager of the Greek-Bulgarian case study. Expert in Water Resources Engineering and Management; Groundwater Hydraulics, Decision Analysis in Water Resource Management, Sustainable Water Resources Policy; Water Demand Management. Ganoulis Jack, Prof., Dr., expert in Environmental risk Analysis, Trans-boundary water management, Groundwater modeling. Kolokytha Elpida, Lecturer, Dr., expert in sustainable water management, demand management techniques, water policy aspects and economics of water resources. Vagiona Dimitra, Civil Engineer, PhD candidate, expert in demand management techniques. Boulgarian part Dr.E.Bournaski is Research Associate Professor working on pipe flow modeling, environmental flows, computational hydraulic and hydrology. He had been part-time Ass. Professor at the Technical University of Sofia on applied numerical methods in engineering. His projects are supported by NSF of Bulgaria, inter-academic exchange programme of BASci., FP5 of EU and several industrial partners. He was Visiting Researcher at National Polytechnical University of Athens, Greece, December 1998 - July 1999. He has a NATO Linkage Grant "Data Assimilation Schemes for coupled eco-hydrodynamical Models.", 1999-2001 with OGS, Trieste, Italy. Prof.I.Ivanov, has a long experience in analysis and operation of water-pressurized systems, turbulent flows; hydrotransport, river flows and environmental hydraulics. He completed his PhD at "V.Kuibishev" Institute of Civil Engineering, Moscow, where he took the academic appointment of Assoc. Professor. In Bulgaria he received Dr.Sc. at Technical University of Sofia. He headed the Hydraulic group of Institute of Water Problems and a relevant seminar until 2000. Dr. Radko Petkov is Research Assoc. Professor in the Institute and Head of the Department of Water resources quality protection. He is specialist in Fluid Mechanics and Computational Hydraulics; Ecological optimisation of locations of pollution sources in porous media and numerical methods. He is member of several professional organizations as Federation of Scientific and Technical Organizations in Bulgaria.