We in the city should be ashamed of some of our practices. On my lunch break the other day – rather than going to a nearby cafe for something to eat – I took a walk around the suburbs surrounding the industrial area I work in. The area is fairly dense with residential houses with the odd commercial premise dotted here and there. Most – around 90% – of these premises had something in common – water catchment was piped directly out onto the street.
How this is allowed I do not know. Considering Australia has faced water restrictions in the past due to drought and low
water storage levels, it seems utterly irresponsible that we are still allowed to continue to treat clean, safe rain water as waste; something to be disposed of down the drain. Only to have it piped back in from a different source so we can turn on our taps and be guaranteed something will come out.
Kirsten, over at Milkwood, wrote a blog this morning about rooftop farming, a phenomenon that seems to be gaining traction in cities across the world. The article was about chickens still being of importance in such a system. I agree. But my mind turned to the rooftops of buildings here in Australia. Consider your local Bunnings Warehouse (Australia’s answer to Home Depot, to my American readers). Look at the size of the place. I did some crude measurements of my local store, using Google Maps, and the catchment area is a massive 7000 square metres (almost 2 acres!). According to my water catchment calculations, that would see a yield of around 3,850,000 litres per year, based on local average rainfall. That’s enough water to satisfy the average needs of 35 people! I can only imagine how much water is wasted by residential and commercial premises that just pipe it down the drain. This is a large scale problem, one that councils and government encourage.
As I said in my comment to Kirsten, this must make rural folk like her, who prey for and respect every last drop they receive, cringe.