Chow and Yusop (2014) Chow M. F. & Yusop Z. 2014. Characterization and source identification of stormwater runoff in tropical urban catchments. Article in Water Science & Technology.69.2, 2014. This study investigated the extent of urban runoff pollution in residential, commercial, and industrial catchments in the south of Peninsular Malaysia. Stormwater samples and flow rate data were collected from 51 storm events. Median. Source identification of urban stormwater pollutants.