Seasonal Variation in Recovery Process of Rainwater Retention Capacity for Green Roofs

Green roofs need to quickly recover their water retention capacity between rainfall events maintain rainwater performance. In this study, the authors observed retention, recovery process, and plant eco-physiological performance of green with four local vegetation species under a typical subtropical monsoon climate for two years. The half-life content after each (T50) was used describe rate. results indicate that (1) decline in can be well described by an exponential curve (R2 > 0.7), average T50 Plectranthus prostratus Gürke shortest among plants; (2) wet season significantly shorter than dry (p < 0.01) because seasonal variations weather conditions activity, such as coverage transpiration; (3) lower due relatively short antecedent period; (4) plants high maximum photosynthetic capacity, strong root system, drought resistance, large were recommended roof plants. Above all, P. prostrates found best choice study.