Changes

==Pluvial (Surface) flooding==  

==Pluvial (Surface) flooding==  

Pluvial flooding occurs when a heavier storm exceeds the urban drainage capacity and causes flooding in some low-lying areas. This results in traffic interruption, economic loss, and other issues. As the climate changes, the incidence of extreme weather events in Ontario is expected to increase and the urban drainage capacity may be overwhelmed more often.  

Pluvial flooding occurs when a heavier storm exceeds the urban drainage capacity and causes flooding in some low-lying areas. This results in traffic interruption, economic loss, and other issues. As the climate changes, the incidence of extreme weather events in Ontario is expected to increase and the urban drainage capacity may be overwhelmed more often.  

LID’s effects urban flooding at a scale of urban drainage systems

LID’s effects urban flooding at a scale of urban drainage systems Kim & Han  (2008);and  Han & Mun (2011) conducted studies to assess if the installation of a [[rainwater harvesting]] tanks could help solve existing urban flooding problems without expanding the capacity of the existing urban drainage system.

Kim & Han  (2008);and  Han & Mun (2011) conducted studies to assess if the installation of a rainwater storage tank can help solve existing urban flooding problems without expanding the capacity of the existing urban drainage system.

==Riverine Flooding==

==Riverine Flooding==

==Background Research==

==Background Research==

TRCA conducted [[modeling]] to evaluate different stormwater management measures (LID and Ponds) in mitigating impacts of development on the peak flow and runoff volume.  

TRCA conducted [[modeling]] to evaluate different stormwater management measures (LID and Ponds) in mitigating impacts of development on the peak flow and runoff volume.  

A sub-catchment in Humber River was selected that has an area of 35.71 ha.  

A sub-catchment in Humber River was selected that has an area of 35.71 ha. The existing land use in the sub-catchment is agriculture and the proposed future land use is employment land with 91% total imperviousness.

The existing land use in the sub-catchment is agriculture and the proposed future land use is employment land with 91% total imperviousness.

Hydrological model run were carried out by integrating different stormwater management measures (LID and SWM Pond) for 2-year and 100-year 6-hr AES design storms.

Hydrological model run were carried out by integrating different stormwater management measures (LID and SWM Pond) for 2-year and 100-year 6-hr AES design storms.