Does anyone have experience designing/building rainwater harvesting system in a northern climate (Chicago)?
I would like to design a system that directs runoff from roofs and walkways into planted areas as a means to filter the runoff, then capture it and store it in an underground tank for re-use as irrigation. The project site is very small, so burying the tank underground allows us to save space. I need specifics on how a system like this might be designed and constructed, what kind of materials might be used, methods of conveying water from roofs to an underground tank, etc.
What happens to the system in the winter and what kind of effect does freeze/thaw have on a buried storage tank and associated plumbing? How is water typically conveyed from roofs/site into a planted area and then into a buried tank? What happens if we get a big rain event and the tank is full?
Thanks in advance to anyone who can help.