Why waste the rain?
I'm obsessed with gardening systems that utilize rainwater without the use of barrels or cisterns. My ultimate fav is using bioswales to catch and filter stormwater on the street.
Fun addition: Dams that utilize trees to catch dirt/ stop erosion, and prevent disaster that can come from broken dams.
Also:
SUSTAINABLE URBAN DRAINAGE! SUDS!
We need more of them, in the right places!
Also, using these to reduce stormwater loads in storm events, particularly in places with combined stormwater and sewage systems, could/would be helpful at reducing river discharges of raw sewage. (If climate change is factored in at system level cos more rain in less time needs to be accouted for at rhe large scale designs...)
Plus using constructed wetlands to retain these discharges and treat them before rivers too!