AWWA ACE59953

As part of a study of nitrification in the Sweetwater Authority (SWA) distribution system, a unique monitoring and modeling program was carried out to characterize the movement, transformation and mixing of water in the distribution system and in distribution system tanks and reservoirs. The monitoring and modeling program was composed of the following primary tasks: an innovative tracer study, which did not require injection of a tracer chemical, in order to characterize movement through the distribution system; validation of the SWA network model using tracer study results; application of a network model to understand water quality dynamics in the distribution system; measuring the vertical distribution of temperatures in several tanks over a period of weeks in order to evaluate potential stratification; and, modeling tank mixing and aging. Includes reference, table, figures.