Comment: 00:40 - 01:39 (00:59)
Source: Annenberg/CPB Resources - Earth Revealed - 21. Groundwater
Keywords: introduction, "James Sadd", water, groundwater, civilization, "fresh water", river, lake, "Earth's surface", dowser
Our transcription: Water has always been vital to civilization.
Cities and towns are usually built along an abundant supply of fresh water, such as a river and a lake.
But lakes and rivers can't supply all of the water that we need, so we've tapped into another source, groundwater.
The practice of water dowsing or finding underground water using a forked stick like this one has been going on for centuries.
Typically the dowser grasps the fork of a stick in each hand and points the other end skyward.
Then as he's walking along and happens to pass over a supply of underground water, the end of the stick or divining rod supposedly twists downward showing where to dig the well.
In reality, however, almost anywhere you point the stick, you'd eventually find water.
Although its depth varies considerably from place to place, water is present beneath the Earth's surface almost everywhere, even under the driest desert.
Geology School Keywords