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In 2001, two high-resolution airbome geophysical surveys were flown in West Texas using Fugro's MEGATEM II system to acquire time-domain EM (TDEM) and magnetic field data. One survey, flown at 100-m line spacing on the Edwards Plateau, identified and assessed groundwater salinization in an oil-field area. The second survey, flown at 400-m line spacing over a West Texas basin, identified favorable areas for groundwater exploration.