Stormwater Collection Plan Roof

Stormwater design guidance green roofs march 2018 revisions to maryland s stormwater management swm regulations.

Stormwater collection plan roof.

By reducing flow rates from rooftops blue roofs are effective in reducing the size of downstream detention basins. Traditionally this involves harvesting the rain from a roof. Rainfall onto the roof is managed using orifices weirs or other outlet devices that control the discharge rate of rooftop runoff. Rainwater collection systems can be as simple as collecting rain in a rain barrel or as elaborate as harvesting rainwater into large cisterns to supply your entire household demand.

A major part of this plan is our commitment to manage the equivalent of an inch of rainfall on ten percent of the impervious areas in combined sewer watersheds by 2030. The nyc green infrastructure plan released in september 2010 proposed an innovative ap proach for cost effective and sustainable stormwater management. Blue roofs are systems that are designed to provide stormwater detention. In 2010 require that environmental site design esd be used to the maximum extent practicable mep to mimic natural hydrologic runoff characteristics and minimize the impact of land development on water resources.

Water collected from the roofs of buildings is called roof water. Rooftop systems detain stormwater on roof surfaces most often either releasing it gradually to the sewer system or allowing for vegetative uptake and evapotranspiration.