Author(s): Stephen D. Thomas; George R. French; James Watson; Joseph A. O’Meara; Matthew P. Dale; Bruno Casal
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Abstract: This paper describes a stormwater attenuation & enhanced infiltration system, specifically designed for an Urban Environment, comprising the construction of attenuation trenches, perforated pipes with gravel surround, integrated with large numbers of drilled vertical infiltrators installed through the base of the trenches. Combining the pressure head of the collected stormwater in the attenuation trenches, with the negative suction pressure within the unsaturated vadose zone, provides the differential pressure to force the water into the ground via these infiltrators. Furthermore, by installing vertical infiltrators, higher permeable ground strata are often encountered, particularly in anisotropic ground conditions where the horizontal permeability is much greater than the vertical permeability.
Year: 2024