Evaluation and suggestion of storm water runoff delay effect from green roof systems based on 3D-GIS analysis.

本研究测试的材料涉及广泛的绿色屋顶系统，通常由排水板、人造轻质土壤和草皮制成。最小峰值径流0.安装唯一排水板时获得298 L/min。径流系数为0。63.最小峰值径流0.采用大面积绿色草皮屋面系统时，排水量可达093 L/min。径流系数为0。30.利用这些数值模拟了2000年东海大暴雨，并计算了若干个例研究区的径流量。根据研究结果，我们提出绿色屋顶安装面积的特性，特别是减少雨水径流。

The material under test of this study has dealt with extensive green roof systems, typically made by drainage boards, artificial light-weight soil and turf. The least peak runoff 0. 298L/min obtained when the only drainage board was installed. The number of runoff coefficient was 0. 63. The least peak runoff 0. 093L/min obtained when the extensive green roof system with sod was installed. The number of runoff coefficient was 0. 30. Using these values, we simulated Tokai torrential rain (2000), and calculated the water runoff from some case study areas. As the results, we suggested the characteristics of green roof installed area, especially reduction of the storm water runoff.