Multimedia

An example of repeat photography in action - A researcher, Jim Malusa of the University of Arizona School of Natural Resources and the Environment, holds a clipboard with a historic photograph captured right at the spot where the image was originally taken in the 1900s, with the same mountain landscape in view.

A USGS repeat photograph of Glen Canyon Dam taken on April 20, 2011 as a match to the 1889 Franklin Nims image of the site before the dam was built, at Colorado River mile -14.7, during the Stanton Expedition. This view was also matched in 1992 by the USGS. The view is taken upstream from river left.

September 18, 2010. Colorado River, Grand Canyon, River Mile 52.8, Nankoweap, Downstream View from River Right. Riparian vegetation continues to increase along the river, reducing the amount of sand that is visible at this distance. There has been a slight increase in the amount of mesquite, but overall it appears to be similar to that present 19 years before.

September 18, 2010. Colorado River, Grand Canyon, River Mile 52.8, Nankoweap, Downstream View from River Right. Riparian vegetation continues to increase along the river, reducing the amount of sand that is visible at this distance. There has been a slight increase in the amount of mesquite, but overall it appears to be similar to that present 19 years before.

February 5, 1991. Colorado River, Grand Canyon, River Mile 52.8, Nankoweap, Downstream View from River Right. The river level is higher than it was 1890, and overall the amount of sand lining the river has declined or is now covered with riparian vegetation. Some of the sand bars appear to have shifted and aggraded.

January 22, 1990. Colorado River, Grand Canyon, River Mile 52.8, Nankoweap, Downstream View from River Right. Stake no. s1424a in the Southwest Repeat Photography Collection. Photo by Robert H. Webb, USGS.