2022 Hydraulic Transient Analysis for Detailed Design of Heritage Road Watermain | Region of Peel, ON, Canada

This project is to conduct a hydraulic transient (modelling) analysis for the detailed design of Heritage Road 600 mm watermain in the Region of Peel Ontario Canada. The objectives of the transient analysis are to evaluate the hydraulic transient-based risks for the sub-transmission main; to provide the maximum, minimum, and recommended design pressures for the sub-transmission main; and to confirm the requirements for combination air valves (CAVs) along the sub-transmission main.

System pressures in the water systems are predominately controlled by water levels at the storage elements, system demand, and the amount of pumping at the key pumping stations. While there are numerous scenarios that can be derived from these and other system variables, 14 base analysis scenarios without surge protection and 4 additional scenarios with surge with surge protection are considered for the proposed 600 mm diameter Heritage Road sub-transmission main. The base analysis scenarios comprehensively test a wide range of system and operational configurations which include, but are not limited to, design year and system demand, reservoir levels, transient event type (i.e., global or local power failure, large pump start, etc.), and pumping station status, with a strict focus on the proposed 600 mm diameter Heritage Road sub-transmission main. A summary of all the transient analysis scenarios considered are presented in Table 1. 

Figure 1: InfoWater hydraulic model showing the proposed 600 mm Heritage Road watermain

Figure 2: List of transient analysis scenarios in the InfoSurge hydraulic model


Table 1: Transient analysis scenarios


Figure 3: Scenario 1 – Transient pressure envelope, 2021 MHD, LWL-to-HWL, global power failure, no surge protection

Figure 4: Scenario 1 – Transient pressure history at MV LLPS Zone 4 discharge header, 2021 MHD, LWL-to-HWL, global power failure, no surge protection

Figure5: Scenario 4 – Transient pressure envelope, 2041 MDD, HWL-to-LWL, global power failure, no surge protection

Figure 6: Scenario 4 – Transient pressure history at MV LLPS Zone 4 discharge header, 2041 MDD, HWL-to-LWL, global power failure, no surge protection

Figure 7: Scenario 13 – Transient pressure envelope, 2021 MHD, HWL-to-HWL, fast 0 to 1 large pump (P9) start at MV LLPS, no surge protection


Figure 8: Scenario 13 – Transient pressure history at MV LLPS Zone 4 discharge header, 2021 MHD, HWL-to-HWL, fast 0 to 1 large pump (P9) start at MV LLPS, no surge protection


Location: Regional Municipality of Peel, ON, Canada

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