Research on rainwater runoff from building area in Beijing
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Abstract:
The underlying surface, which is formed by the real estate construction, is divided into four types: waterproof building roof, indurative ground, pervious ground and greenbelt. On the basis of the national standards and regulations, four underlying surface area of ??proportion of the total area is 24%, 22.8%, 28.2%, 25%. By calculated, the total runoff coefficient of the Beijing real estate project construction is 0.60. The calculation and analysis of the rain runoff from building area in Beijing from 2006 to 2011 show that the rain runoff become maximum in July and August .The order of the rain runoff formed by four underlying surface was: waterproof building roof, indurative ground, pervious ground, greenbelt. Based on the analysis of the characteristics of building area and the features of rainwater runoff, we should pay attention to the measures construction of rainwater collection and utilization to increase rain infiltration and utilization and alleviate the pressure of urban rainwater pipe drainage, such as permeable pavement, catchment basin, roof greening and undercut type green space.
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