The role of vegetation in regulating stormwater runoff from green roofs in a winter rainfall climate
Schroll et al. (2011) suggested that green roofs with vegetation species can significantly reduce both the timing and magnitude of stormwater runoff. The study examined the performance of green roofs in effectively reducing stormwater runoff during the winter rainfall climate of the U.S. Pacific Northwest. It was also tested whether irrigation used in green roof vegetation could successfully influence stormwater performance. The findings of the study revealed that vegetation species could reduce stormwater runoff during the summer period and not during the winter or rainy season. The findings suggested that cool, wet season climates are challenging in effectively reducing stormwater runoff.