Flow control

On a watershed scale, factors contributing to flooding include the total volume of stormwater, the peak flow and the duration of peak flow. 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.

https://www.hydro-int.com/en/hydro-brake-flow-control-series

Weirs

https://books.google.ca/books?id=fTQWDQAAQBAJ&dq=Jefferies+Scotland+Swales+2004&source=gbs_navlinks_s

Surface runoff from at-grade surfaces, resulting from rain or snowmelt events.

A stormwater management strategy that seeks to mitigate the impacts of increased urban runoff and stormwater pollution by managing it as close to its source as possible. It comprises a set of site design approaches and small scale stormwater management practices that promote the use of natural systems for infiltration and evapotranspiration, and rainwater harvesting.