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USGS NRP Tucson: Landscape Change in the Southwest

Changes in Riparian Vegetation in Arizona

Salt River Near Roosevelt (09498500), November 25, 2000

Image of Salt River Near Roosevelt (09498500), November 25, 2000.
Dominic Oldershaw, Stake 955 Flood frequency on the Salt River didn't change significantly in the 20th century, as it did on other rivers in the region, although four 100-year floods did occur in a 15-year period. The 1993 flood, which had a peak discharge of 143,000 ft3/s at the gaging station on the bridge visible in the distance, did little to slow the advance of riparian vegetation---particularly tamarisk---at this site. Native species, notably phragmites, have also increased, although they are difficult to distinguish from the tamarisk at this location.

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