| dc.description.abstract | In the past, water impermeable pavement was often used for construction development projects, which reduced water absorption, and permeation capability.Therefore, it not only expropriated the requirement for survival of microorganisms in the soil, but reduced the capability of land to nourish vegetation.In addition, when typhoon comes with heavy rains, the idea of flood control was tended to drain rainwater away as soon as possible we used in the past. Therefore, it caused the great burden of the water drainage and the flood also couldn’t completely drain away right away in low-lying areas.rained too heavy adn consequently was flooded everywhere.
Because above-mentioned problems in green building nine indexes, it is one among them that the base rainfall storage index to assess it, formulation hoping to reduce above-mentioned problems. Using software PCSWMM cooperate with different rainfall, intensity, slope, and depth of base on rainfall storage of research and analysis. With verify now afterwards, and revise to its result, in order to be closer to the real state now, for the engineer and relevant unit’’s application in the future.
By way of study on PCSWMM program of performance simulations and analysis research, the porosity of base has influenced on rainfall storage most. However, it not obvious influence on permeable pavement of slope. In primitive building, permeable pavement of the rainfall storage should refers to the patterns of pavement, which is classified as parts of base drainage Q=k×A×t+Vs×n and non of base drainage Q=Vs×n to calculate. And the porosity should cooperate with particle-size distribution of soil and uses dry density transformed to calculate it. | en_US |