期刊
WATER SCIENCE AND TECHNOLOGY
卷 55, 期 4, 页码 125-133出版社
IWA PUBLISHING
DOI: 10.2166/wst.2007.102
关键词
assumptions; modelling; rainwater harvesting; rainwater yield; time steps
The use of domestic rainwater tanks with back up from mains water supplies in urban areas can produce considerable reductions in mains water demands and stormwater runoff. It is commonplace to analyse the performance of rainwater tanks using continuous simulation with daily time steps and average water use assumptions. This paper compares this simplistic analysis to more detailed analysis that employs 6 minute time steps and climate dependent water demand. The use of daily time steps produced considerable under-estimation of annual rainwater yields that were dependent on tank size, rain depth, seasonal distribution of rainfall, water demand and tank configuration. It is shown that analysis of the performance of rainwater tanks is critically dependent on detailed inputs.
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