STORM WATER DRAINAGE SYSTEM

摘要

A storm water drainage system comprising catch basins, manholes and storm sewer mains is improved by a surrounding trench filled with porous material to form a reservoir. Perforated pipes extending between adjacent manholes permit some of the storm water runoff during peak runoff periods to flow from the perforated pipes into the porous reservoir and to flow out of the reservoir and into the drainage system during other times.