Domestic Rain Water Harvesting – Botswana

With water shortages being in the news for the last few years the question of “Why can’t we catch this water and use it?” pops up on Botswana Twitter.

One of the popular solutions, and frequently implemented on government staff houses in rural areas, is to put gutters on houses and direct the collected rainwater into plastic water tanks.  Seems like a great idea, but how do the numbers add up?

I did a few calculations using data from our weather station for the 2014-2015 period and it is interesting, with different answers depending on circumstances (no surprise there, then). Continue reading “Domestic Rain Water Harvesting – Botswana”