Dick Thompson, lead hydrologist for the recharge unit of Tucson Water, talks to a University of Arizona hydrology class. The pond in the background is filled with Central Arizona Project water that Tucson Water is using to recharge the region's groundwater.
The photo may only be used to illustrate a story about the research described in the accompanying news release, "Groundwater Recharge in the American West Under Climate Change." Please make sure to credit the photo as requested. Do not post this photo independent of the story.