Changes

*Installed automated systems that are activated by timers; or,

*Installed automated systems that are activated by timers; or,

*Sophisticated “smart irrigation” systems that can be remotely controlled and coupled with rain sensors or sources of local weather data to only operate during extended dry periods (i.e., droughts).

*Sophisticated “smart irrigation” systems that can be remotely controlled and coupled with rain sensors or sources of local weather data to only operate during extended dry periods (i.e., droughts).

**Drip irrigation is the most common type of irrigation system for green roofs (Green Roof for Healthy Cities, 2011) because it transfers the water directly to the growing medium via drip emitters installed at or near the surface with relatively little loss to evaporation.  

**Drip irrigation is the most common type of irrigation system for green roofs because it transfers the water directly to the growing medium via drip emitters installed at or near the surface with relatively little loss to evaporation.  

**Other types of irrigation systems use handheld or installed spray nozzles to distribute water to the plants. If an automatic irrigation system is in place, individuals performing inspection testing, maintenance and repairs on it should refer to the operator’s manual from the product vendor or installer for instructions specific to that product.  

**Other types of irrigation systems use handheld or installed spray nozzles to distribute water to the plants. If an automatic irrigation system is in place, individuals performing inspection testing, maintenance and repairs on it should refer to the operator’s manual from the product vendor or installer for instructions specific to that product.