Containing papers presented at the Fourth International Conference on Water Resources Management, this book examines the recent technological and scientific developments associated with the management of surface and sub-surface water resources. The papers cover the following subjects covered: Water management and planning; Hydrological modelling; Water quality; Groundwater flow problems and remediation; Waste water management; Waste water treatment and management; Water markets and policies; Pollution control; Irrigation problems; Urban water management; Decision support systems; Coastal and estuarial problems. The conference was held in Kos, Greece, in May of this year