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Water flow is a statistical thing. Many variables interact in intricate ways. Little shifts can, and will, produce big changes. Unpredictable changes. The engineers predicted at most two or three feet of evaporation losses per year from the reservoir: they got closer to ten. A government hydrologist had pointed out a serious oversimplification the engineers were making, but the hydrologist was ignored. A geologist pointed out that the rock at the dam has a lot of water-soluble mineral (calcite) in it. The engineers felt the effects could be nullified. The Chief of Dam Builders toured the country touting the wonders of his new reservoir, giving anyone who would listen a picture that didn't always conform to the pictures that some of his listeners had seen for themselves. And so it happened that the dam builders convinced themselves that a natural menace became a national resource. |
National resource
A reservoir for
energy -- a reservoir for water
Human understanding
of energy became scientific in the 19th century.
The math-level
of human thinking transformed human knowledge into something of great power.
The understanding
of this math-level knowledge has yet to become widespread sufficiently
to allow
engineering practice to avoid mistakes
as well
as it could...as well as it should.
Click
on the picture
Catfish
Canyon
looking
upstream from an Anasazi home