ii Table of contents

s of Posters • Decision Support System (D.S.S.) for regional and national water-supply planning .............124 N. Hassid, E. Adar ZIWR, Jacob Blaustein Institutes for desert studies, Ben Gurion University of the Negev, Israel • Mechanical strength of virgin and cleaned ultra filtration membranes ..............................128 E. Arkhangelsky, V. Gitis Unit of Environmental Engineering, Ben-Gurion University of the Negev, Israel • Spatial and Temporal Variations in the Concentrations of VOCs in the Unsaturated Zone and Water-Table Region of the Coastal Plain Aquifer ..........................................133 H. Lev-Wiener, O. Dahan, N. Weisbrod, D. Ronen, A. Nasser, E.R. Graber and Z. Gerstl Department of Geological and Environmental Sciences, Ben Gurion University, Israel • New catalytic cloths and reactor for water hydrotreatment: utilization for nitrate removal ................................................................................138 U. Matatov-Meytal , M. Sheintuch Department of Chemical Engineering, Technion, Haifa 32000, Israel • Water Production Using Air Cooling Under Conditions of Some World Coastal Regions ......139 Tzivion S. , Eppelbaum L. Dept. of Geophysics and Planetary Sciences, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel-Aviv University, Tel Aviv, Israel • Application of an Air-Lift Immersed-Membrane Bioreactor for Domestic Wastewater Reclamation ......................................................................................................145 F. Yang, A. Bick, S. Shandalov, G. Oron Dept. of Environmental Hydrology and Microbiology, Zuckerberg Institute for Water Research, J. Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Israel