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USGS NRP Tucson: Landscape Change in the Southwest

Changes in Riparian Vegetation in Arizona

Santa Cruz River at Tucson (09482500), February 3, 1964

image of Santa Cruz River at Tucson (09482500), February 3, 1964.
photographer and number unknown This downstream view shows the approach th the gaging station at the Congress Street Bridge in Tucson. A realtively small channel became established within the arroyo walls in the middle part of the 20th century, when few significant floods occurred. Non-native athel tamarisk, a non-invasive species in Tucson, appear downstream from the bridge on channel right.

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