25 Feb 2009
I agree. Water is often in short supply where I have been trying to live here in N. Bulgaria. I have half-finished lining a pond with concrete slabs from - I am told - an old canal that I assume must be dried-up these days. Already it is working well (if you can pardon the "pun") - but of course isn't much use for washing. Allthough the dog may disagree.
By the way, I think a good shape to make the pond is eliptical in plan view, and use a chain across the major and minor axes to define the basin, and lay the slabs to this with a hoe or spade. Obviously rectangles don't go precisely into a curved basin, so some planning is required to get some kind of a fit.
. The elipse I marked with two stakes stuck in the ground, and a precisely-loose-fitting loop of rope around them. Pull the loop taught with a third "marking" stake and walk around. The stake moves in an elipse of some kind. Details upon request. (Time)
Rainwater-butts and covered tanks are defineately becoming better and better investments !