Water resources quality : preserving the quality of our water resources [results from the 4th International Austrian Isreali Technion Symposium cum Industrial Forum held in Vienna 23 25 April 2001] This monograph results from the 4th International Austrian Israeli Technion Symposium cum Industrial Forum under the banner of the Austrian Technion Society initiative Technology for Peace Science for Mankind which was held in Vienna 23 25 April 200 I devoted to Preservation of the Quality of our Water Resources. The Symposium was a cooperative effort with the Austrian Federal Ministry of Education and Science and Culture and the Austrian Federal Ministry of Economy and Labor. The program was structured and managed by a joint Program Committee incorporating the editors of this monograph who are faculty members from the Stephan and Nancy Grand Water Research Institute at the Technion Israel Institute of Technology and the University of Agricultural Sciences (Bodenkultur) of Vienna. The Symposium attracted participation from universities research institutes industries and national authorities from Austria Germany Greece Hungary Israel Jordan Palestinian Autonomy Poland Russia Spain Turkey USA and Uzbekistan. The Symposium topics were of major international interest and talks were at a high professional level. Therefore I have gladly accepted the initiative of the Symposium Program Committee to extend and expand manuscripts of special merit to chapters of this monograph whose title is identical to that of the Symposium. Out of the 39 papers presented at the Symposium 24 papers were selected for inclusion in this monograph according to their scientific merit and quality of contribution to the overall subject. Those selected were expanded and subjected to peer review for inclusion in this Volume. I Preserving the Quality of Groundwater 1 Evaluation and Modeling of the Impact of Environmentally Friendly Fertilization Techniques 2 Identifying Soil and Transport Properties Using a Mode of Infiltration Redistribution Flow and Transport in the Unsaturated Zone 3 Spatial Modeling of Nitrogen Leaching 4 The Effect of Fractures on the Reclamation of NAPL Contaminated Aquifers 5 Numerical Simulation as a Tool to Improve Subsurface Flow Constructed Wetlands for Water Treatment II Preserving the Quality of Surface Water 6 Water Quality Monitoring in Russian Rivers: Results of a Case Study on the Pollution Situation of the Rivers Moskva and Oka 7 Water Sources and Quality Along the Lower Jordan River Regional Study 8 Water Resources Issues of the Laurentian Great Lakes 9 Advanced Approach for Synoptic Monitoring of a Lake Ecosystem: Lake Kinneret as a Model 10 Monitoring Lake Kinneret and Its Watershed: Forming the Basis for Management of a water Supply Lake III Management of Water Resources Quality 11 Integrated Water Resources Management (IWRM) for the Preservation and Improvement of Water Quality in South Central Kansas 12 Application of the Integrated Water Management Approach to the River Spree 13 Nitrate Water Pollution Risk in the Lower Jordan Valley 14 Introducing Sustainability Issues to the Water Management of the Lower Jordan Valley 15 Groundwater Management Strategies to Improve Surface Water Quality in an Urbanized Area IV Improving Water Quality 16 Drinking Water Quality for the 21st Century § New Technologies for a New Era 17 Turbidity Removal by Polyelectrolytes as Flocculant Aids in Flocculation with Aluminium Salts 18 The Application of Electrodialysis for Drinking Water Treatment V Wastewater Recycling 19 Reuse of Industrial Wastewater Effluent in the Petrochemical Industry 20 Isolation and Identification of the Water borne Protozoan Parasites Cryptosporidium spp. and Giardia spp. and their Presence on Restricted and Unrestricted Irrigated Vegetables in Israel 21 Greywater Recycling: Field Experience 22 Chemical Pretreatment of Sewage A Cost Benefit Method for Upgrading of Existing and Constructing New Wastewater Treatment Plants 23 Biological Nitrogen Removal Using Immobilized Bacteria 24 Using Phages for Characterization of Effluent Quality in a Stabilization Pond and Reservoirs System in Arid Regions L.