Prof Karl Flessa

Karl Flessa is the Chief Scientist of the monitoring program for the Colorado River Delta, a 13-year, binational effort by agency, academic and NGO scientists to evaluate the hydrologic and ecological effects of environmental flows. 

Karl Flessa is a Professor of Geosciences at the University of Arizona. He and his students have been working on the conservation biology of the Colorado River delta and estuary since 1992. His research focuses on the use of historical records in conservation biology, the environmental effects of water diversions, and the role of science in public policy.

He is a founding member of the Colorado River Research Group, an independent, scientific voice for the future of the Colorado River.

He received his doctorate from Brown University and has been at the University of Arizona since 1977.  In 2013-2014 he was a Distinguished Visiting Scientist at CSIRO where he tried to learn about the Murray-Darling Basin.