Modeling of a lot scale rainwater tank system in XP-SWMM: a case study in Western Sydney, Australia.
Lot scale rainwater tank system modeling is often used in sustainable urban storm water management, particularly to estimate the reduction in the storm water run-off and pollutant wash-off at the lot scale. These rainwater tank models often cannot be adequately calibrated and validated due to limited availability of observed rainwater tank quantity and quality data. This paper presents calibration and validation of a lot scale rainwater tank system model using XP-SWMM utilizing data collected from two rainwater tank systems located in Western Sydney, Australia. The modeling considers run-off peak and volume in and out of the rainwater tank system and also a number of water quality parameters (Total Phosphorus (TP), Total Nitrogen (TN) and Total Solids (TS)). It has been found that XP-SWMM can be used successfully to develop a lot scale rainwater system model within an acceptable error margin. It has been shown that TP and TS can be predicted more accurately than TN using the developed model. In addition, it was found that a significant reduction in storm water run-off discharge can be achieved as a result of the rainwater tank up to about one year average recurrence interval rainfall event. The model parameter set assembled in this study can be used for developing lot scale rainwater tank system models at other locations in the Western Sydney region and in other parts of Australia with necessary adjustments for the local site characteristics.
School of Computing, Engineering and Mathematics, University of Western Sydney, Locked Bag 1797, Penrith, NSW 1797, Australia. Electronic address: marlene.vandersterren@environment.nsw.gov.au.
Marlène
M
van der Sterren
School of Computing, Engineering and Mathematics, University of Western Sydney, Locked Bag 1797, Penrith, NSW 1797, Australia. Electronic address: a.rahman@uws.edu.au.
Ataur
A
Rahman
Barker Ryan Stewart, Suite 603, Level 6, 12 Century Circuit, Norwest Business Park, NSW 2153, Australia. Electronic address: garry@barkerryanstewart.com.au.
Garry
G
Ryan
D001315:Australia; D003247:Conservation of Natural Resources; D008962:Models, Theoretical; D009584:Nitrogen / Q000032:analysis; D010758:Phosphorus / Q000032:analysis; D011891:Rain; D014874:Water Pollutants, Chemical / Q000032:analysis; D060753:Water Quality; D014881:Water Supply
D014874:Water Pollutants, Chemical; D010758:Phosphorus; D009584:Nitrogen
Rainwater tanks; Storm water management; Water sensitive urban design; Western Sydney; XP-SWMM