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All low impact development facilities can help to prevent flooding by providing watershed distributed stormwater storage, and most feature some form of peak flow control device at the outflow or overflow. The limiting factors in the contribution that a system can make to flood control include the total storage and the rate at which the system can be emptied between events.   
 
All low impact development facilities can help to prevent flooding by providing watershed distributed stormwater storage, and most feature some form of peak flow control device at the outflow or overflow. The limiting factors in the contribution that a system can make to flood control include the total storage and the rate at which the system can be emptied between events.   
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Many proprietary solutions have been developed to control flow at junctions within the [[treatment train]]
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{{:Disclaimer}}
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==Vortex technologies==
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*[http://echelonenvironmental.ca/stormwater/stormwater-flow-control/vortex-valves/ Echelon vortex valves from 0 to 120 L/s]
     
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