ABSTRACT
This chapter presents the retrofit projects which utilized the open channel and end-of-pipe surface storage techniques. The case study presented in this chapter concerns an open channel retrofit in the City of Mississauga the largest of its kind in the Greater Toronto Area. The case study is located in the City of Vaughan and involves a dry stormwater management pond, which was originally constructed for flood control in 1981. The model used the same series of precipitation records from the "post-retrofit" QUALHYMO modeling analysis discussed above. The study concluded that the "pre-retrofit" Ninth Line SWM facility often filled to near-capacity during rain storms and the cause appeared to be two undersized culverts downstream. The functional design parameters for the preferred retrofit option were: Similar to the Ninth Line SWM facility retrofit project, water quality enhancement for the Pine Valley SWM pond was assessed using the Chen methodology.
