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  • ...s Incorporated. 2008a. 20 Year Performance Evaluation of Grassed Swale and Perforated Pipe Drainage Systems. Project No. 524(02). Prepared for the Infrastructure |Grass swale/perforated pipe||Nepean, ON<ref name=Sabourin/>||Sandy silty till||86 %
    5 KB (693 words) - 17:28, 23 July 2020
  • .... Runoff water is delivered to the practice through [[pipes]] connected to catchbasins, hydrodynamic (i.e., [[ Oil and grit separators|oil and grit]]) separators, ...ceive stormwater from them. May include manholes with [[Flow through riser|perforated risers]]. Also known as exfiltration storm sewer, percolation drainage, or
    31 KB (4,425 words) - 21:09, 29 September 2022
  • *[[Bioswales]] or the use of [[perforated pipes]] beneath grass swales can reduce the nuisance problems associated wi ...enance. However, adequate pretreatment such as grass swales, extended sump catchbasins, or prefabricated units must be provided.
    24 KB (3,152 words) - 18:27, 6 August 2020
  • |Sub-drain/Perforated pipe obstruction ...Excavation and Grading''' - prior to backfilling and installation of pipes/catchbasins
    41 KB (5,863 words) - 17:55, 24 November 2022
  • ...groundwater, or collected by a [[Underdrain|sub-drain]] (i.e., underground perforated pipe) and discharged to the storm sewer system or another BMP. Depending on |Sub-drain/Perforated pipe obstruction
    40 KB (5,747 words) - 15:11, 4 August 2023
  • ...ver present, to the highest elevation of accumulated sediment present. For catchbasins, manholes and hydrodynamic separator pretreatment devices a sludge sampler ...filtration trenches]], [[infiltration chambers]] and [[Exfiltration trench|perforated pipe storm sewer systems]]'''
    71 KB (10,445 words) - 23:43, 16 January 2024
  • ...de soil. When runoff volume exceeds the trench water storage capacity, the perforated underdrain pipe directs excess filtered water to a downstream outlet storm ...l cell systems vs. structural soil medium) and elevation of the underdrain perforated pipe in the cross-section based on subgrade soil permeability.
    57 KB (7,691 words) - 14:16, 17 May 2024
  • ...curb openings (e.g. modified curbs, spillways), pipes, road or side inlet catchbasins, trench drains or other pre-fabricated inlet structures; ...with 'tighter' soils where infiltration rates are < 15 mm/hr. Including a perforated [[pipe]] in the [[reservoir aggregate]] layer helps to empty the facility b
    74 KB (9,862 words) - 15:09, 4 August 2023