The use of rainwater tanks as a supplement to traditional domestic urban water supply systems is becoming increasingly common, especially given growing environmental awareness and ongoing drought conditions. Such tanks must be appropriately configured in order to effectively meet demand. Two important aspects of this configuration are the preset mains trickle topup rate and trickle topup volume. Improper configuration of these parameters can result in ongoing tank failure. As such, there is a need to improve our understanding of how these parameters influence tank performance in various rainfall climates around Australia. This paper reports part of a study undertaken to address this need. For a range of topup volumes, it is shown that tank perfomance is highly dependent on climatic regime and demand, and only very weakly dependent on tank size. Seasonal variations in tank failure are investigated and correlated with rainfall and yield patterns.
7th International Conference on Urban Drainage Modelling and the 4th International Conference on Water Sensitive Urban Design, Book of Proceedings, Vol. 2 (Grand Hyatt Melbourne, Melbourne, Australia 05-06 April, 2006) p. 335-341