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Rainwater catchment

Strawberry rainbarrel

The other tidbit I wanted to share from my South Carolina visit pertained to rainwater harvesting. Daddy's climate is very drought-prone and his sandy soil means that whatever rainfall hits the earth is gone in short order. Since he uses a well for household water, there's a limit to how much he can divert for irrigation purposes. Enter rainwater catchment, both in the form of the rain barrel shown above...

Rainwater pond

...and by channeling gutter overflow directly into his water garden.

The oasis Daddy and Barbara have created using minimal water is truly inspiring. I hope you enjoy seeing rainwater catchment in action!



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A neighbor of mine has three of those huge 300gal rain "barrel". He was told recently that apparently the heavy-duty plastic that makes up the barrel will crack and break if left in the sun for a number of years. Have you heard anything about this? How long has your Pop had that "barrel" there and is it facing south?

Love the water garden! I'm jealous. I'm in the process of making something similar.

Comment by Nayan Mon May 8 11:15:14 2017

The ultraviolet component in sunlight has enough energy to break down the bonds in plastics. The more bonds are broken, the more brittle and weak the material becomes until it fails.

Thermoplastics (plastics that can melt) like the material IBC's are made of are generally more affected than thermosets (epoxy, polyester, "FRP"). Thermosplastics are the most used plastics by weight.

Plastic articles made for outdoor use generally are specially formulated. They often contain pigments to prevent solar radiation from completely penetrating the material and they can contain stabilizers. Note that the latter are a finite amount and are consumed in the process of protecting the plastic.

IBC's (especially the transparent ones) are not really made to be stored outside in full sunlight. On the other hand, they have relatively thick walls made by rotomoulding. So it will take time to degrade all that. But in the end, the material will fail.

Comment by Roland_Smith Mon May 8 14:52:37 2017

Thank you Roland for the info. My neighbor decided to throw an old bedsheet he got from the thrift store over it to try to cut down on possible degradation.
I will pass on your info to him.

Comment by Nayan Mon May 8 17:43:45 2017