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{{:Disclaimer}}
{{:Disclaimer}}
*[http://echelonenvironmental.ca/stormwater/stormwater-flow-control/vortex-valves/ Echelon vortex valves from 0 to 120 L/s]
*[http://echelonenvironmental.ca/stormwater/stormwater-flow-control/vortex-valves/ Echelon vortex valves from 0 to 120 L/s]
*[https://www.hydro-int.com/en/hydro-brake-flow-control-series Hydrobrakes of all sizes, flow control requirements]
https://www.hydro-int.com/en/hydro-brake-flow-control-series
==Weirs==
==Weirs==
https://books.google.ca/books?id=fTQWDQAAQBAJ&dq=Jefferies+Scotland+Swales+2004&source=gbs_navlinks_s
https://books.google.ca/books?id=fTQWDQAAQBAJ&dq=Jefferies+Scotland+Swales+2004&source=gbs_navlinks_s