Using the recent PCSWMM 2D capabilities the flood line for the Cooksville Creek watershedwas independently investigated. These splits are a result of a low lying area close to the flow path and can be hidden in a 1D representation. One of the limitations of 1D modeling is that the flow splits are not separately identified. Historical flow and rain gage and flow data from 2007 to 2009 was used to calibrate the 1D model. The model was imported and geo-referenced 52 existing HEC-RAS modelsinto SWMM5. An existing 1D Cooksville Creek major system model, developed in 2009, was implemented into a real-time flood forecasting tool, and is used by the Credit Valley Conservation Authority’s (CVC) flood duty officers. Two flood damage centers in Cooksville Creek were identified by CVC as areas significantly affected by flooding and were used for the 2D flood line analysis. The objective of this study was to compare the currently established HECRAS flood lines to those generated by a SWMM5 model using a 1D-2D overland mesh. ![]() The highly urbanized Cooksville Creek watershed, located in Mississauga, Ontario, is approximately 34 km2 and is vulnerable to flooding.
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