Sunday, May 6, 2007

Water

The Early Ubaid - (5300 - 4700 BC) period when the wheel was invented sprang from an agrarian settlement based upon intensive subsistence irrigation.

Ancient Rome had eleven major aqueducts, built between 312 B.C. (AquaAppia) and 226 A.D. (Aqua Alexandrina); the longest (Anio Novus) was 59 miles long. It has been calculated that in imperial times, when the city's population was well over a million, the distribution system was able to provide over one cubic meter of water per day for each inhabitant.

Calculate your water usage: http://www.dcwasa.com/kids/activities/dailywaterusage.html