JFC Stormwater Management<< Back to JFC Home| Flooding Rainfall on a Greenfield site is either absorbed into the ground or runs off slowly to the nearest watercourse. When these sites are built upon, much of the area becomes impermeable increasing surface water runoff which is piped to the nearest outfall or storm drain. This increased run-off coupled with global climate changes have caused large scale flooding in many areas with conventional stormwater drainage systems being overloaded. |
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| Legislative Response The EPA is now implementing European water management legislation in Ireland. Local authorities now require a sustainable urban drainage system (SuDS) to be designed for all new developments minimising downstream flooding. SuDS are defined by the Construction Industry Research and Information Association (CIRIA) as "a sequence of management practices and control structures designed to drain surface water in a more sustainable fashion than some conventional techniques”. |
Solution JFC offers three individual systems that provide a solution to stormwater management problems. HydroChamber System- A unique HDPE Corrugated Arch chamber with an integrated silt management system. HydroCell System – A Polypropylene Modular Block with a 95% void ratio for maximum utilisation of space available. Weholite HDPE Large Diameter Pipe - A large diameter pipe system with manifold inspection and on-site internally welded joints. |
| Attenuation or Infiltration A detailed site audit is required to determine if the tank should be permeable or impermeable and if discharge to the local watercourse is suitable. This is carried out by the consultant engineer and should include analysis of the following parameters: site topography, local watercourse, winter water table level, soil type, soil infiltration rate and local authority regulations. |
| Infiltration This system disposes of all the stormwater on-site through infiltration and allows the stormwater to help replenish the natural water table as would have happened before the site was developed. A key benefit is that over time a natural biomass is allowed to form on the walls and floor of the tank which filters and helps break down micro pollutants and contaminants that may be in the stormwater.  JFC HydroChamber JFC Hydro-Valve JFC HydroCell |
Attenuation Where possible it is recommended to dispose of the storm water through the use of a permeable attenuation system. This controls the rate at which water enters a watercourse or storm drain whilst allowing infiltration to the ground. On some sites (e.g. high water table) the attenuation system is impermeable sending all water directly to the watercourse or storm drain. Corripipe & Fittings HydroSeal Weholite Large Diameter Pipe |
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