Urban Rainwater harvesting.

[Lightspeed]

Just doing rainwater harvesting calculations and thought I'd apply the math to an urban setting, namely a typical Victorian terrace house in London that my family owned many years ago.

Surprisingly, result based on average UK rainfall is encouraging.

Because these houses are terraced, its viable to install large collection vessels in the back gardens. These can potentially capture around 50% of all the water that falls on the roof.

3,000 litres of pre-stored water, topped up with harvested rainwater, has the potential to keep a family of 5 or 6 supplied indefinitely with sufficient water for survival.

This is a bit of a surprise to me. It needs looking at more closely based on actual house dimensions and historic rainfall patterns in specific areas.

But food for thought???