if you guys need a meter to know how much water you have left this is te place to be : http://www.water-level-indicator.com/ it really helped me out allot i hope it helps you to!
Hello permies: Here is a link to a local public access TV show in SB that shows some different water catchment ideas being put into action. It covers infiltration basins, rain barrels, swales, permeable pavers, and roof runoff. Enjoy!