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Mosca,
Colorado USA
Hydrology
Desert Above, Drenched Below
The cycle is actually quite simple. It is evident that the
snow in the mountains melts, flows down the streams, carries
sand, and soaks into the ground...Predicting what changes
in any part of the cycle would do to the other parts is not
so simple.
Andrew Valdez, Great Sand Dunes Geologist
Explore:
 Mysterious Waters of the Dunes
Pulsating Flow (animation)
Seasonal Flow in Medano Creek
Perched Aquifer
Sand Transportation
[This website is created to show the beauty
and wonder of a great american natural treasure. The contents
are courtesy of the National Park Service. It is created in
English and in Japanese. All the photo images shown here,
except the black & white photo onthe top which is a courtesy
of the Great Sand Dunes National Park and Preserve, are taken
by Kiyomichi Koike. The copy rights are reserved.]
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