Neat rain barrel DIY system here using recycled materials from our neighbor Priscilla. She had two large water tanks that were not being used, placed on on top of the other, directed the rain water in to the tanks with a piece of leftover rain gutter. You could do the same thing with a rain barrel.
The tanks holding the rain water are slightly higher than the vegetable garden, and attached to the bottom of each tank is a spigot. Attach a garden hose to either tank and you have a gravity fed soaker hose system.
Watch these soaker hose drip irrigation videos:
I imagine one of our math enabled contributors, maybe Rick or Mike, could figure out how much water rains down on a particular roof during a rainstorm of x inches, and then we would know how much water this can collect. But rainwater collection math is beyond me.
One thing to watch out for with this kind of large open system is mosquito breeding, you can buy these small discs that float in the water and take care of the mosquito eggs, covering such a large tank with screening might be impractical.
Are there other was to keep mosquitoes at bay? What other ways could you improve this rainwater collection system?
Let us know your thoughts below: