DECISION-SUPPORT SYSTEM FOR DOMESTIC WATER DEMAND FORECAST AND MANAGEMENT Dr. Loay J Froukh, Newcastle University – UK Frookh Abstract A decision support system (DMS) for domestic water demand forecast and management has been developed as part of a highly integrated decision-support system for river-basin management (Water Ware). The system provides water resources planners with the facilities for management of domestic water demand for any demand region and time period. It allows for computing conservation effectiveness due to the implementation of various demand-management measures such as metering, pricing, pressure reduction, saving devices, public awareness, plumbing codes and water use regulations.  In general, the system comprises the following components: (1) geographic information system, (2) database management system, (3) expert system, (4) multi-decision component, (5) prediction models, (6) user-interface, and (7) hypertext files. The system is generic and can be used for any region since the information used give the user several options based on the existing conditions. The system capabilities are demonstrated using the data of Swindon demand zone in Thames Basin in the UK. Key words: Decision-support system, expert system, geographic information system, mulit-decision component, domestic water demand management, and prediction.