S. D. Waltemeyer 1994 Traveltime characteristics were determined using stream-velocity data and tracer-dye data for a reach of the Rio Grande. Traveltimes determined by the stream-velocity method were virtually the same as those determined by the tracer-dye and tracer-gas technique. The mean velocity of the stream was 1.12 miles per hour at a flow of about 300 cubic feet per second. Reaeration characteristics were determined using a propane tracer gas and a tracer-dye (rhodamine WT). Reaeration coefficients were adjusted for water temperature and the effects of wind movement on the water surface. The peak method-adjusted reaeration-coefficient mean value for the reach was 7.0 per day and ranged from 4.6 to 8.3 per day. The area method-adjusted reaeration- coefficient mean value for the reach was 7.7 per day and ranged from 5.5 to 10.4 per day. application/pdf 10.3133/wri944071 en U.S. Geological Survey, [Water Resources Division, New Mexico District] ; Can be purchased from U.S. Geological Survey, Earth Science Information Center, Open-File Reports Section, Traveltime and reaeration characteristics for a reach of the Rio Grande, Albuquerque, New Mexico, October 1991 reports