Water harvesting is also a part of permaculture design. It depends on variability of the rain, the slope you are working with. I have a two-volume book from Bra

Water harvesting is also a part of permaculture design. It depends on variability of the rain, the slope you are working with. I have a two-volume book from Brad Lancaster with all about design patterns for harvesting and managing water, whether too much or not enough. O