AWWA DSS69202

This powerpoint presentation begins by listing five main discussion points. Closed valves in water distribution systems is the first, along with causes of closed valves, and closed valve implications. Field testing and model calibration is the second topic and includes hydraulic grade line test, traditional system wide test, and typically conducted trunk mains (e12 inch). A case study of a suburban Washington, D.C. utility is summarized. Cost implications of newer test methods are presented, along with business process integration. Includes figures.