Author(s): James Li; Darko Joksimovic; Celia Fan; Patelle Fong; Boji Chen; Bianca Dickel
Linked Author(s): James Li, Darko Joksimovic
Keywords: No Keywords
Abstract: A full-scale (46m x 2.3m x 1.7m) sewer model was used to study the hydrologic/hydraulic performance, and sediment accumulation of an innovative Sustainable Urban Drainage System (SUDS) for highly urbanized areas. The SUDS, termed Toronto Exfiltration System (TES), was developed in the City of Toronto to capture urban runoff along the pore space of the granular sewer trench between connecting manholes and allow exfiltration to the underlying soil. The objectives of the TES experiments were to determine (1) the hydraulic grade lines (HGL) along the TES; (2) the inflow and outflow rates through the TES; and (3) the sediment accumulation rate, under various inflow conditions. It was found that (1) the unsteady HGLs during the filling of TES storage showed a high inlet loss and a gentle system head loss; (2) an average 30% attenuation of the inflow peak rates; and (3) sediment accumulation inside the two PVC perforated pipes was about 40% of the inflow sediments. The data collected will be used to calibrate a hydrologic/hydraulic model for the simulation of TES performance under different hydrologic design conditions.
Year: 2024