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USGS NRP Tucson: Landscape Change in the Southwest

Changes in Riparian Vegetation in Arizona

Gila River at Calva (09466500), May 21, 1984

Image of Gila River at Calva 09466500), May 21, 1984.
Raymond M. Turner In October 1983, a flood of 150,000 ft3/s passed through this reach in the wake of Tropical Storm Octave. This flood followed one that peaked at 100,000 ft3/s in 1978. These floods shifted the channel back into the view, and driftwood racks appear throughout the foreground. Despite this flood, dense tamarisk appears on both floodplains.

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