Preventing the risk of flooding

With the increasing development of greenfield land and redevelopment of the urban areas, impermeable areas of roofs, roads, car parks and hardstanding are replacing previously permeable land through which rain percolated with only a small percentage reaching the surface water sewers. The dangers are that without proper stormwater management the increased volumes of surface water directed to existing sewers and watercourses, that were never intended to receive these increased flows, will cause overloading and a risk of flooding.

How SPEL can provide effective methods of control and improve water quality

Where underground storage of rainwater is preferred to ponding due to the land use restrictions SPEL Tankstor underground tanks, in a range of diameters and lengths, can be installed singly or interconnected. Vortex flow controllers are fitted to restrict the flow to an acceptable rate or, if drain levels do not permit, pumps can be incorporated to affect the same flow rates.

Where rainwater harvesting can be a benefit both for its use and help attenuate flows, the combined SPEL RainSave/attenuation system can be incorporated for the rainwater storage and attenuation saving cost and valuable site space.

To contain silt and at the same time separate out hydrocarbons SPEL fuel oil Separators should be incorporated at source and prior to any attenuation system.