Suggested citation and version history for


  Leake, S.A., Greer William, Watt, Dennis, and Weghorst, 
       Paul, 2008, Use of superposition models to simulate 
       possible depletion of Colorado River water by 
       ground-water withdrawal:  U.S. Geological Survey 
       Scientific Investigations Report 2008-5189, 25 p. 
       [http://pubs.usgs.gov/sir/2008/5189/].


  Version 1.0

  March 3, 2011
  Added depletion contours as a data ZIP file from 
  http://az.water.usgs.gov/projects/LCRS/datadown.html

  October 29, 2008
  Initial release online at
  http://pubs.usgs.gov/sir/2008/5189/