Aaron Heldmyer, University of Colorado at Boulder, Department of Civil, Environmental and Architectural Engineering, Boulder, CO, United States, Ben Livneh, Cooperative Institute for Research in Environmental Sciences, Boulder, CO, United States, William Hastings Farmer, USGS Office of Surface Water, Rolla, MO, United States, Jessica M Driscoll, U.S. Geological Survey, Denver, CO, United States and Noah P Molotch, University of Colorado at Boulder, Geography / INSTAAR, Boulder, CO, United States