The groundwater resources protection and restoration has been important for sponge urban construction, green building residential construction could be conducive to the water pollution control, so rainwater collection, as a basic technical requirement of green building, has been in large-scale promotion of its use. This study has discussed roofing rainwater collection of community separate buildings based on analyses of rainfall variation characteristics in Changsha and available potential of annual roof rain runoff, and designed roof rainwater collection systems composed of initial rainwater ...
