Regional setting.- State of the Art.- Hydrogeology.- The hydrochemical history of the Rift.- Research Studies.- Characterization of recharge areas by rare earth elements and stable isotopes of H2O.- Regional hydrochemical and hydrogeological aspects of groundwater in the Jordan-Dead Sea Rift system.- Specific regional hydrological aspects.- Hydrogeology and flow pattern along the Fazael-E-Salt cross-section.- Lake Tiberias and its dynamic hydrochemical environment.- Retreat of the Dead Sea and its effect on the surrounding groundwater resources and the stability of its coastal deposits.- Aquifers in the western Jordan Valley.- 3-D Hydrogeological model of the Marsaba-Feshkha region.- Groundwater flow and transport model of the Jericho area.- Hydrochemistry and isotope hydrogeology in the Jericho area/Palestine.- A GIS based hydrosystem model for the Jericho Plain, Palestine.- Aquifers in the eastern Jordan Valley.- GIS based model for groundwater flow and heat transport in Zarqa Ma\'in and Jiza area, central Jordan.- Groundwater conditions of the Jordan Rift escarpment northeast of the Dead Sea.- Protective potential of soils, ground-water vulnerability and hazards in the Wadi Shueib, Jordan.- An integrated approach for the hydrogeological investigation of unconsolidated aquifers in the lower Jordan Valley.- Groundwater Management.- Sustainable management of groundwater resources.- State of water strategy and policy.- Future water demands.- Summary and conclusions.