Author(s): James Li; Kevin Sze
Linked Author(s): James Li
Keywords: No Keywords
Abstract: The occurrence of vector-borne West Nile virus in Canada has resulted in the use of larvicides for widespread urban mosquito control at roadside catch basins, where mosquitoes are commonly found in sump water. To determine the fate of larvicides at catch basins, a full scale physical model of catch basins was constructed tostudy the hydrodynamic flushing of larvicides during storm events. After the critical runoff rates which flush out larvicides were determined, a hydrologic and risk model was developed to simulate the risk of flushing outlarvicides during a typical summer period in Toronto. It was found that storm events ranging from a 3-month to1.4 year return period in Toronto might have the potential to flush out larvicide pellets from catch basins with sediments. The risk of flushing of larvicide ingots is low while the risk of flushing of larvicide pellets is high over typical summer months.
Year: 2018