Green Build-out Model: Quantifying the Stormwater Management Benefits of Trees and Green Roofs in Washington, DC.

摘要

The Green Build-out Model is a planning tool that quantifies the cumulative stormwater management benefits of trees and green roofs for different coverage assumptions across the District of Columbia. It calculates potential reductions in stormwater runoff within the municipal separate storm sewer system (MS4) and the combined sewer system (CSS) that contribute to water quality impairment in the Nation’s capital. The Green Build-out Model adds the “green component” to the existing hydrologic and hydraulic model of the District (Mike Urban) used by the DC Water and Sewer Authority to support development of the Long Term Control Plan for the CSS. The MS4 areas were added to the model so that all of the municipal sewer systems were included in one planning tool. The Green Build-out Model integrates GIS land cover data and hydrologic processes using rainfall storage and coverage areas for trees and green roofs.