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USGS NRP Tucson: Landscape Change in the Southwest

Changes in Riparian Vegetation in Arizona

Gila River at Calva (09466500), October 17, 1973

Image of Gila River at Calva (09466500), October 17, 1973.
Raymond M. Turner To reduce evapotranspiration, phreatophytes (mostly tamarisk) were removed from this reach in 1970, and the floodplain was reseeded to native grasses. Those grasses are mostly gone at the time of this photograph, one year after a flood of 80,000 ft3/s passed through this reach. The small shrubs throughout the view are mostly tamarisks that are re-establishing in the reach.

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