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Research Ranch Advisory Team

Tim Keefer is a Hydrologist with the USDA-Agricultural Research Service, Southwest Watershed Research Center in Tucson, AZ. He is the research coordinator for field activities at the ARS Walnut Gulch Experimental Watershed in the vicinity of Tombstone, AZ, and for the several ARS instrumented watersheds on the Santa Rita Experimental Range, south of Tucson. He received a MS degree in Hydrology from the Department of Hydrology and Water Resources at the University of Arizona. He received his Bachelors degree with majors in Philosophy and Mathematics from the University of Leuven, Belgium.

Current research efforts are directed to identifying linkages of the El Nino-Southern Oscillation and other global “teleconnections” to local hydrologic dynamics such as precipitation, temperature, runoff and soil moisture. Field work has been focused on sensing technologies to measure precipitation and surface and profile soil moisture in semi-arid environments, which has involved working on several joint USDA-NASA remote-sensing field campaigns in AZ and OK. He is currently active instrumenting hydrologic sites, in the Upper San Pedro Basin for the Upper San Pedro Partnership. He has been with the ARS-SWRC since 1989.