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Descrizione
English: Seasonally dry salt lakes and the traces of ephemeral streams occupy many of the valleys of the Zagros Mountains in southern Iran. Much of the time, the rivers and lakes are dry above ground, but subterranean water flows along the same pathways. Where these subterranean streams flow out of the mountains, the water table comes closer to the surface, and it is more readily accessible through wells. This simulated natural-color image of southeastern Fars province in southern Iran shows a dry river channel carving through arid mountains toward the northeast. The dry river spreads out across the valley floor in a silvery fan. A broad belt of lush agricultural land follows the curve of the fan and stretches out along a road that runs parallel to the ridgeline. The valley-ward margin of the intensely green agricultural belt fades to dull green along streams (or irrigation canals). The image was captured by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on NASA’s Terra satellite on October 12, 2004.
Data
Fonte http://earthobservatory.nasa.gov/IOTD/view.php?id=36041
Autore NASA image created by Jesse Allen, using data from NASA/GSFC/METI/ERSDAC/JAROS, and the U.S./Japan ASTER Science Team. Caption by Rebecca Lindsey, based on interpretation provided on the ASTER Project Science Imagery Gallery Website.

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Public domain Questo file è nel pubblico dominio perché creato dalla NASA. La politica sul copyright della NASA afferma che «il materiale della NASA non è protetto da copyright a meno che non sia specificato altrimenti». (NASA copyright policy e JPL Image Use Policy).
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Alluvial Fan in Southern Iran. Image from NASA's Terra satellite

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attuale21:38, 2 dic 2018Miniatura della versione delle 21:38, 2 dic 20181 451 × 1 031 (704 KB)AriadacapoCropped 52 % horizontally, 57 % vertically using CropTool with lossless mode.
21:36, 2 dic 2018Miniatura della versione delle 21:36, 2 dic 20183 000 × 2 400 (3,22 MB)AriadacapoFull-size original from source
02:27, 17 feb 2010Miniatura della versione delle 02:27, 17 feb 2010720 × 480 (300 KB)File Upload Bot (Magnus Manske) {{BotMoveToCommons|en.wikipedia|year={{subst:CURRENTYEAR}}|month={{subst:CURRENTMONTHNAME}}|day={{subst:CURRENTDAY}}}} {{Information |Description={{en|Alluvial Fan in Southern Iran NASA image created by Jesse Allen, using data from NASA/GSFC/METI/ERSDAC

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