Irrigation and Drainage

Oral

395216 - A Comparison of Evapotranspiration Between a Natural and Engineered System in an Arid Basin Along the Rio Grande-Bravo River

Tuesday, June 5
4:00 PM - 5:30 PM
Location: Skyway Room
Co-Authors: Dave Gutzler, New Mexico – New Mexico State University; Alex Mayer, Michigan – Michigan Tech University; Rebecca Teasley, Minnesota – University of Minnesota-Duluth

A Comparison of Evapotranspiration Between a Natural and Engineered System in an Arid Basin Along the Rio Grande-Bravo River
Authors: Thiemann, K., Gutzler, D., Mayer, A., and Teasley, R

In this study, we estimate hydrologic fluxes and storages in an arid basin featuring a narrow ribbon of intensive irrigated agriculture and urban use. The study basin, (36,988 km2), comprises the middle portion of the Rio Grande-Bravo, covering portions of New Mexico, Texas, and Chihuahua, Mexico. A recent 20-year period (1993-2013) is used to represent present day conditions and to calibrate a model that is made to simulate a naturalized system over the same period that is created using a hydrometeorological dataset that excludes human water use and infrastructure (Livneh et al. 2015). Preliminary results Show that evapotranspiration averaged over this period is 1.16 times greater than the naturalized system, attributable to irrigation (66% of overall ET increase), reservoir surfaces (20%) and urban use (14%). Since surface water fluxes and storages are insufficient to meet increased water demands associated with the increase in ET, the majority of the ET increase occurs at the expense of groundwater storage.

Livneh B., T.J. Bohn, D.S. Pierce, F. Munoz-Ariola, B. Nijssen, D. Cayan, R. Vose, and L.D. Brekki, 2015: Development of a spatially comprehensive, daily hydrometeorological data set for Mexico, the conterminous U.S., and southern Canada: 1950-2013, Nature Scientific Data, 2, 150042, doi:10.1038/sdata.2015.42.

Ken Arn Thiemann


Michigan Tech University

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395216 - A Comparison of Evapotranspiration Between a Natural and Engineered System in an Arid Basin Along the Rio Grande-Bravo River



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