Stream-Axis EM from a helicopter: identifying salinity sources in a large river basin

Stream-Axis EM from a Helicopter: Identifying Salinity Sources in a Large River Basin Jeffrey G. Paine (Bureau of Economic Geology Jackson School of Geosciences The University of Texas at Austin) Edward W. Collins (Bureau of Economic Geology Jackson School of Geosciences The University of Texas at Austin) and H.S. Nance (Bureau of Economic Geology Jackson School of Geosciences The University of Texas at Austin) SUMMARY____________________________________________________________ We combined multifrequency airborne EM measurements of apparent ground conductivity with chemical analyses of surface water to delineate natural and oil-field salinity sources that degrade water quality in the upper Colorado River (western Texas U.S.A).