AWWA ACE61660

In order to develop the most cost-effective infrastructure program to meet projected growth inthe western portion of the City of Ottawa's water supply system, the City embarked on asignificant study of outdoor water use. It was generally felt that by reducing peak demand usage,major infrastructure could be downsized, deferred or even eliminated, and therefore reducecapital and operating expenditures in the short and long term. Thus, determining the true impactof outdoor use on the peak flows was essential for assessing the potential benefits associatedwith an outdoor water use reduction program.The study involved a detailed analysis of the peak demands for a primarily residential area,which considered overall daily summer demands as well as diurnal water use patterns. Thisinvolved an evaluation of individual sprinkler usage, in terms of duration, flow rates and timeof day. The analysis resulted in a separation of outdoor uses from the daily norms and provideda clear understanding of the actual outdoor water usage and its impact on maximum dailydemands and the diurnal usage pattern. Both these factors affect major infrastructure needs.A statistical analysis was then undertaken to develop a predictive modelling tool, based onclimatological factors and land use, to refine projections for peak water demands on the systemin the future. This model will be used to provide confidence in assessing the impacts of anyreduction strategy on the peak demand rates, resulting in a quantifiable evaluation of the programeffectiveness. Includes tables, figures.

Product Details

Edition:

Vol. - No.

Published:

06/17/2005

Number of Pages:

12

File Size:

1 file , 1.2 MB