Vegetation Survival in Green Roofs without Irrigation

The implementation of green roofs as sustainable urban drainage systems provides benefits for stormwater control and the environment is more encouraged. A model estimation probability vegetation survival without irrigation proposed. model, developed through a probabilistic analytical derivation procedure, can also consider effects chained rainfall events, need continuous simulation hydrological processes. equations be useful in design roofs, allowing to determine growing medium thickness terms an assumed risk withering dry periods. proposed able identify optimal medium, over which performances increased only with irrigation. Model were tested by application two case studies Italy. Comparison between probabilities cumulative frequencies from water content shows good agreement provide first confirmation reliability.