31 Jul '16, 10pm

Band-e-Amir Fan

Band-e-Amir Fan

Taken through a window on the International Space Station by the EarthKAM camera, this photo shows dense clusters of agricultural fields radiating across a large alluvial fan in Afghanistan. Clusters of dark green fields stretch away from the hills like fingers across the Band-e-Amir alluvial fan. The river flows from a canyon in the hills (lower left) and exits at the apex of the fan. From this point, many canals lead the water across this large, flat plain, irrigating the fields and providing drinking water for a large population. The alluvial fan also provides softer sediments for plowing and sowing seed, as well as smooth surfaces for easy transport of crops to markets. Each dark cluster of fields has a market at its center. Just about all of the water that comes out of the canyon is used by the people and the crops, resulting in little water flowing off the fan. Befor...

Full article: http://earthobservatory.nasa.gov/IOTD/view.php?id=88472&s...

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