This study uses continuous simulation modeling in PCSWMM to analyse the impacts of stormwater management ponds located throughout the Sawmill River watershed in Dartmouth, Nova Scotia on downstream peak flows near the watershed outlet at Sullivan’s Pond. Since stormwater management ponds delay and prolong peak flows, the downstream watershed receives increased runoff volumes and sustained peak flow rates from the ponds that can combine with other watershed drainage to increase downstream peak flows. ![]() ![]() Numerous hydraulic modeling studies carried out since the 1970s have demonstrated that the impact of flow detention is reduced as the flow is routed through the downstream watershed.
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