Edited by:
Robert H. Webb is a research hydrologist with the U.S. Geological Survey and teaches at the University of Arizona.
Lynn F. Fenstermaker is a remote-sensing research professor at the Desert Research Institute in Las Vegas, Nevada.
Jill S. Heaton is an assistant professor of geography at the University of Nevada, Reno.
Debra L. Hughson is a science advisor for the Mojave National Preserve of the National Park Service.
David M. Miller is a research geologist for the U.S. Geological Survey in Menlo Park, California.