Home Archived May 12, 2018

USGS NRP Tucson: Landscape Change in the Southwest

Changes in Riparian Vegetation in Arizona

Gila River at Calva (09466500), October 6, 2000

Gila River at Calva (09466500) October 6, 2000.
Dominic Oldershaw, Stake 331a Except for withdrawals of domestic and irrigation water, the Gila River is unregulated upstream from Calva. In January and February, 1993, three floods passed through this reach that exceeded 100,000 ft3/s. Despite these floods, tamarisk has grown considerably, blocking the view of the river channel from this camera station. Despite the enormous effort at tamarisk removal and river restoration, the tamarisk has attained a higher biomass than it had in 1964. The channel has shifted from the right side to the left side of this view.

Previous Photo | Gila River at Calva Index | Next Photo

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
Page Contact Information: Please direct feedback regarding this page to the webmaster.
Page Last Modified: