Author(s): Mahadi Lawan Yakubu, Zulkifli Yusop, Muttaqa Uba Zango, Abubakar Abdulkarim
Linked Author(s): Mahadi Lawan Yakubu
Keywords: Nonpoint Source Pollution (NPS), rain uniformity, raindrop diameter, simulator, terminal velocity
Abstract: Rainfall simulator (RS) is a specially made device that aims to replicate natural rainfall dynamics. It has been widely used in the investigation of processes associated with rainfall events, from soil erosion, soil infiltration, to recently urban wet weather processes involving nonpoint source pollution. There are few commercial suppliers of rainfall simulators, which are often too expensive. So, most often researchers often fabricate their own in line with their research objectives. An RS is intended to investigate the influence of rainfall runoff in a wet-weather nonpoint source pollution on impervious urban surfaces was developed, and calibrated to ensure spatial and temporal variation of rain intensity, kinetic energy, and variation of drop size diameter, capable of replicating storms found in the tropics as closely as possible. The RS consisted of four interrelated components, the RS frame, the water system, the robotic system, and the plot. 783 measurements were carried out to evaluate the performance of the RS. The RS can remarkably achieve rain uniformity of 89%, 2. 51�0. 13 mm median raindrop diameter of the natural event, over 80% terminal velocity, and up to 87% kinetic energy
Year: 2017