Congrès INFRA 2017
4 au 6 décembre
Biographie du conférencier
Carl Yates has extensive experience in the water utility profession having served as Project Engineer, Chief Engineer and General Manager of the Halifax Water Commission from 1988 to 1996. In 1996, he was appointed General Manager of the Halifax Regional Water Commission which assumed a regional mandate after the municipal amalgamation of the greater Halifax area in 1996. In 2007, Mr. Yates oversaw the formation of the first regulated water, wastewater and stormwater utility in Canada with the transfer of wastewater and stormwater assets from Halifax Municipality. Halifax Water is a body corporate municipal utility, generating approximately 130 million dollars in annual revenue with assets of over $2 Billion.
Mr. Yates received a Bachelor of Engineering degree from Memorial University of Newfoundland in 1984 and a Master of Applied Science from the Technical University of Nova Scotia in 1992. He is Past Chair of the Focus Area Council of the Water Research Foundation, a Board member of the Canadian Water Network, and a member of the Board of Directors of Special Olympics Nova Scotia.
Résumé de la conférence
Halifax Water has documented success in water loss control through adoption of the methodology promoted by the International Water Association [IWA] and American Waterworks Association [AWWA]. After 15 years of adoption and adaptation, leakage improvement is reflected in an Infrastructure Leakage Index [ILI] reduction from 9.0 to 3.0 and annual savings of $600,000. Water loss control at Halifax Water is holistic in nature and benefits greatly from a fully metered customer base, a distribution network that is subdivided into 75 permanent district metered areas [DMAs], and a robust supervisory control and data acquisition [SCADA] system. These tools are used in tandem for night flow analysis for leakage assessment and to determine best achievable benchmarks in system flows. A typical DMA incorporates a zone in the distribution system with a pipe length of 30 km, 150 hydrants or approximately 2500 customer connections.
As part of its holistic approach, pressure management through fixed outlet control has been actively pursued by Halifax Water to ensure pressure within the distribution system is optimized for customer service and kept at levels to minimize leakage. Building on the successful installation of DMAs, flow modulated pressure control was installed in a typical sector in Dartmouth to further control and manage leakage. The Dartmouth Central DMA was selected to evaluate advanced pressure management as a leakage management tool for the Water Research Foundation [WaterRF] Project 2928, “Leakage Management Technologies”. By reducing system pressures during periods of low demand, flow rates through background and active leaks were reduced. Dual supplies into the DMA offered the challenge of modulating two control valves in geographically differing locations, to achieve the desired system pressure in response to the changing demand. After further research beyond the WaterRF project, Halifax Water has optimized advanced pressure management in the Dartmouth DMA, and is expanding the application to other DMAs.
