Hi, I have a request which may be a little strange and perhaps there
is no real answer to it. Anyways, it does occupy my mind:
I live in a semi-arid region with a prolonged and severe dry season.
So, every drop of water I can save counts. I have a spring up in the
mountain and several water holes which together provide just enough
water to irrigate about half an acre during the dry season, if I use
it very sparingly.
I recently hit on the idea of letting the irrigation water run
through open channels or a series of containers where, under the
light of day, algae would form in the water. I do believe that these
algae would have a beneficial effect on the irrigated soil.
The problem is that I don’t want to expose the water directly to the
sun since I don’t want to risk that any of it evaporates. What would
be the best way to construct such waterways? Should I cover them
with some sort of semi-transparent shading cloth that is permeable to
air? Or should I use transparent glass or plastic that isn’t
permeable to air? I don’t want the water to heat up under the glass
or plastic. But if I use a shading cloth, I’m not sure that none of
it will evaporate. As I said, I can’t afford to loose a single
drop.
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