M. ZAHIR, A. NAZ, T. AHMED and M. AHMAD 2018. Estimation of First-Flush Diverter Phenomena through Volume Based Grab sampling of Rainwater . Sindh University Research Journal - SURJ (Science Series). 50, 3 (Sep. 2018). DOI:https://doi.org/10.26692/surj.v50i3.953.