[Leica] IMG: Ganat Level

[Tina Manley]

PESO:

Ganats in Iran bring water from the mountain to the desert and have been in
use for over 2000 years.

"Qanats are constructed as a series of well-like
<https://en.wikipedia.org/wiki/Water_well> vertical shafts
<https://en.wikipedia.org/wiki/Shaft_mining>, connected by gently sloping
<https://en.wiktionary.org/wiki/sloping> tunnels
<https://en.wikipedia.org/wiki/Tunnel>. Qanats tap into subterranean water
in a manner that efficiently delivers large quantities of water to the
surface without need for pumping. The water drains by gravity
<https://en.wikipedia.org/wiki/Gravity>, with the destination lower than
the source, which is typically an upland aquifer
<https://en.wikipedia.org/wiki/Aquifer>. Qanats allow water to be
transported over long distances in hot dry climates without loss of much of
the water to evaporation <https://en.wikipedia.org/wiki/Evaporation>."

We went to a water museum in Yazd that explained all about the ganats and
how water use was allocated.  There was a lot of interesting information
and many displays but I found the ancient level used to determine the slope
of the ganats to be most fascinating:

http://tinamanley.photoshelter.com/gallery-image/Iran/G0000YmlbTddL96g/I0000aSa4vH2oM34

Other photos preceding.

Tina


-- 
Tina Manley
www.tinamanley.com
tina-manley.artistwebsites.com
http://www.alamy.com/stock-photography/3B49552F-90A0-4D0A-A11D-2175C937AA91/Tina+Manley.html