Hydrology and Earth System Sciences www.hydrol-earth-syst-sci.net 1027-5606 1607-7938 13 11 2009 10.5194/hess-13-2169-2009 http://www.hydrol-earth-syst-sci.net/13/2169/2009/ http://www.hydrol-earth-syst-sci.net/13/2169/2009/hess-13-2169-2009.html http://www.hydrol-earth-syst-sci.net/13/2169/2009/hess-13-2169-2009.pdf 2169 2178 2009-11-12 Dying to find the source – the use of rhodamine WT as a proxy for soluble point source pollutants in closed pipe surface drainage networks C. H. Mines A. Ghadouani anas.ghadouani@uwa.edu.au G. N. Ivey School of Environmental Systems Engineering, The University of Western Australia, 35 Stirling Highway (M015), Crawley, Western Australia, 6009, Australia Rhodamine WT (RWT), a xanthene dye, may serve as a proxy for soluble pollutants within quantitative tracing studies investigating point source contaminant transport. 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