Water quality best management practices, such as wet ponds, typically have forebays with culvert inputs. Incorporating correctly sized natural plunge pools can enable a more compact design for velocity attenuation. This allows a greater “stilling” effect for more efficient pollutant removal. Photos: Estes Design Inc.
Culvert outlets with submerged tailwater conditions typically exhibit a variation in designed pool geometry from their counterparts with free-falling jets or supported jets.