Suat Irmak

Suat Irmak, Ph.D.

Contact Information:
239 L.W. Chase Hall
Lincoln: East Campus
(402) 472-4865
sirmak2@unl.edu
Email   

- Harold W. Eberhard Distinguished Professor, Department of Biological Systems Engineering
- Courtesy Professor of Department of Earth and Atmospheric Sciences
- Courtesy Professor of Department of Agronomy and Horticulture
Academic Degrees
  • Ph.D., Agricultural and Biological Engineering, University of Florida
  • M.E., Agricultural Structures and Irrigation Engineering, University of Mediterranean-Antalya-Turkey
  • B.E., Agricultural Structures and Irrigation Engineering, University of Cukurova-Adana-Turkey
Areas of Research and Professional Interest
Research Programs
  • Soil and water resources and irrigation engineering
  • Impact(s) of change in climate variables on water resources and agricultural productivity
  • Measurement and modeling of surface energy balance variables for different surfaces
  • Crop water productivity (crop water use efficiency)
  • Evapotranspiration (energy balance, water balance, weighing lysimeters, Eddy Correlation System, Bowen Ratio Energy Balance System)
  • Measurement and modeling of soil water dynamics
  • Impacts of cover cropping systems on soil quality, surface energy balance and water balance
  • Fundamentals of variable rate irrigation and fertigation


Click here for selected publications !

Research Projects

  • Research Projects List Overview
  • Center Pivot Irrigation Research
  • Subsurface Drip Irrigation Research-1
  • Subsurface Drip Irrigation Research-2
  • Evapotranspiration
  • Low Pressure Irrigation System
Extension Programs
  • Agricultural water management
  • Pressurized and gravity irrigation systems
  • Technology implementation for enhancing crop water productivity
  • Crop water use (evapotranspiration)
  • Crop water productivity (crop water use efficiency)
  • Large scale learning networks
  • On-farm Research and Demonstration



In the News: Powered by the Nebraska Engineering News

Honors and Awards

  • “2017 ASABE Educational Aids Blue Ribbon Award” presented by the American Society of Agricultural and Biological Engineers (ASABE) for the refereed publication titled “Observed space and time changes in air temperatures and daily temperature range for the counties in the US Great Plains from 1968 to 2013” by M. Kukal and S. Irmak. July 17, 2017. Spokane, WA.
  • “Best Paper Award” in the Journal of Irrigation and Drainage Engineering for the refereed journal article titled “Inter-annual variation in long-term center pivot-irrigated maize evapotranspiration (ET) and various water productivity response indices: Part I. Grain yield, actual and basal ET, irrigation-yield production functions, ET-yield production functions, and yield response factors.” Presented by the Irrigation and Drainage Council of the American Society of Civil Engineers (ASCE) and Environmental and Water Resources Institute (EWRI), Sacramento, CA. May 23, 2017.
  • “Best Paper Award” in the Journal of Irrigation and Drainage Engineering for the refereed journal article titled “Inter-annual variation in long-term center pivot-irrigated maize evapotranspiration (ET) and various water productivity response indices: Part II. Irrigation water use efficiency (IWUE), crop WUE, evapotranspiration WUE, irrigation-evapotranspiration use efficiency, and precipitation use efficiency.” Presented by the Irrigation and Drainage Council of the American Society of Civil Engineers (ASCE) and Environmental and Water Resources Institute (EWRI), Sacramento, CA. May 23, 2017.
  • “Most Viewed Refereed Journal Article” for the refereed journal article published by Arellano, G.M., and S. Irmak. 2016. “Reference (potential) evapotranspiration: Part I. Comparison of temperature, radiation, and combination-based energy balance equations in humid, subhumid, arid, semiarid and Mediterranean-type climates.” J. Irrigation and Drainage Engineering, ASCE 142(4): 04015065 (p. 1-21). doi:10.1061/(ASCE)IR.1943-4774.0000978. (October 2016).
  • “2016 ASABE Educational Aids Blue Ribbon Award” presented by the American Society of Agricultural and Biological Engineers (ASABE) for the refereed publication titled “Basic soil and water resources and irrigation engineering/agricultural water management and related terminology.” July 18, 2016. Orlando, FL.
  • “2016 ASABE Educational Aids Blue Ribbon Award” presented by the American Society of Agricultural and Biological Engineers (ASABE) for the refereed publication titled Spatial and temporal corn evapotranspiration across Nebraska.” July 18, 2016. Orlando, FL.

  • "Best Paper Award" presented by the Irrigation and Drainage Council of the American Society of Civil Engineers (ASCE) and Environmental and Water Resources Institute (EWRI). May 25, 2016. West Palm Beach, FL. 

  • "USDA-NIFA National Innovative Programs and Partnership Award" for the Nebraska Agricultural Water Management Network (NAWMN) for its groundbreaking water management work and contributions in advancing agricultural science. The award was presented by the USDA Undersecretary Dr. Kathy Voteki and the USDA-NIFA Director Dr. Sonny Ramaswamy. October 23, 2014. Washington, D.C.

  • "Innovative Extension Specialist Award" The award provides recognition of outstanding contributions by an Extension Specialist in the program area(s) relative to his/her assignment. The award recognizes leadership in developing and carrying out programs in cooperation with Extension Educators and other Extension Specialists. November 13, 2014. Kearney, NE.

  • "2014 ASABE John Deere Gold Medal Award" presented by the American Society of Agricultural and Biological Engineers (ASABE) for achievements through engineering for improved manipulation, use and conservation of soil-water resources, and that has resulted in applications of a new concept, product, art or science that advanced the development of agriculture. July 16, 2014. Montreal, Canada. (youngest researcher/scientist to receive this award in ASABE history).

  • "2014 ASABE Heerman Sprinkler Irrigation Award" presented by the American Society of Agricultural and Biological Engineers (ASABE) in recognition of exceptional contributions in research, development, extension, and education that have made significant contributions to the enhancement of productivity and efficiency of sprinkler irrigated agriculture worldwide.  July 16, 2014. Montreal, Canada. (youngest researcher/scientist to receive this award in ASABE history).

  • "2014 ASABE Superior Paper Award" presented by the American Society of Agricultural and Biological Engineers (ASABE) for the refereed journal article titled "Development and evaluation of ordinary least squares regression models for predicting irrigated and rainfed maize and soybean yields," published in Transactions of the ASABE by V. Sharma, D.R. Rudnick, and S. Irmak. July 16, 2014. Montreal, Canada.

  • "Award of Excellence" presented by the Western Association of Agricultural Experiment Station Directors for the outstanding progress and impacts of the Regional Committee W2128 Microirrigation for Sustainable Water Use. July 13, 2014, Tahoe, NV.

  • "UNL College of Engineering Research and Creative Activity Award" for recognizing individuals for activities associated with investigation or experimentation aimed at the discovery and/or interpretation of facts, as well as the development of creative works or new products. April 15, 2014. Lincoln, NE.

  • "Omtvedt Innovation Award" in recognition of exceptional service for leadership and significant contributions to the initial development of partnerships and programs in the Daugherty Water for Food Institute at the University of Nebraska and Institute of Agriculture and Natural Resources. September 6. Lincoln, NE.

  • "2013 ASABE Educational Aids Blue Ribbon Award" presented by the American Society of Agricultural and Biological Engineers (ASABE) for the publication titled "Evaluation of water productivity and irrigation efficiency in Nebraska corn production." July 22, 2013. Kansas City, MO.

  • "2013 Honorable Mention Paper Award" presented by the Irrigation and Drainage Council of the American Society of Civil Engineers-Environmental and Water Resources Institute (ASCE-EWRI) for the refereed journal article titled "Dynamics of nocturnal, daytime, and sum-of-hourly evapotranspiration and other surface energy fluxes over non-stressed maize canopy" published in J. Irrigation and Drainage Engineering. May 19, 2013. Cincinnati, OH.

  • National Finalist in the "Search for Excellence in the Crop Production category of NACAA Awards Program" for the Nebraska Agricultural Water Management Network (NAWMN) impact and accomplishments. NACAA 97th Annual Conference, July 15-19, South Carolina.

  • Recognition for Outstanding Service as Past Chair of the Evapotranspiration in Irrigation and Hydrology Committee, American Society of Civil Engineers-Environmental and Water Resources Institute (ASCE-EWRI). May 23, 2012. Albuquerque, New Mexico.

  • "2011 ASABE Educational Aids Blue Ribbon Award," presented by the American Society of Agricultural and Biological Engineers (ASABE). This competition encourages agricultural engineers in industry and public service to strive for excellence in extension activities through the interchange of ideas on successful methods and techniques. It also promotes excellence in educational aids, which represent agricultural engineering and through the exchange of ideas and individual recognition, contributes to overall improvement in the use of educational aids. August 8, 2011. Louisville, KY.

  • "2011 ASABE Superior Paper Award," presented by the American Society of Agricultural and Biological Engineers (ASABE) for the refereed journal article titled "Nebraska Agricultural Water Management Network: Integrating research and extension/outreach," published in the Applied Engineering in Agriculture. August 8, 2011. Louisville, KY.

  • "2011 Best Honorable Mention Paper Award," presented by the Irrigation and Drainage Council of the American Society of Civil Engineers-Environmental and Water Resources Institute (ASCE-EWRI) for the refereed journal article titled "Actual and reference evaporative losses and surface coefficients of a maize field during non-growing (dormant) periods," published in J. Irrigation and Drainage Engineering. May 18, 2011. Palm Springs, CA.

  • "2010 ASABE Young Extension Professional Award," which recognizes outstanding success in motivating people to acquire knowledge, skills and understanding to improve agricultural operations. Irmak received the award for his exemplary leadership and outstanding contributions and impact to soil and water resources engineering through research, extension education, and outreach programs. American Society of Agricultural and Biological Engineers (ASABE), 2010 Annual International Conference. June 23, 2010. Pittsburgh, PA.

  • "2010 Best Honorable Mention Paper Award," presented by the Irrigation and Drainage Council of the American Society of Civil Engineers-Environmental and Water Resources Institute (ASCE-EWRI), for the refereed journal article titled "Variability analyses of alfalfa-reference to grass-reference evapotranspiration ratio in growing and dormant seasons," published in J. Irrigation and Drainage Engineering by Irmak, S. et al. May 18, 2010. Providence, Rhode Island.

  • "2010 Best Honorable Mention Paper Award," presented by the Irrigation and Drainage Council of the American Society of Civil Engineers-Environmental and Water Resources Institute (ASCE-EWRI) for the refereed journal article titled "Reference and crop evapotranspiration in south central Nebraska: I. Comparison and analyses of grass and alfalfa-reference evapotranspiration," published in J. Irrigation and Drainage Engineering by Irmak, A. et al. May 18, 2010. Providence, Rhode Island.

  • "2010 Best Honorable Mention Paper Award," presented by the Irrigation and Drainage Council of the American Society of Civil Engineers-Environmental and Water Resources Institute (ASCE-EWRI) for the refereed journal article titled "Reference and crop evapotranspiration in south central Nebraska: II. Measurement and estimation of actual evapotranspiration," published in J. Irrigation and Drainage Engineering, by Irmak, A. and Irmak, S. May 18, 2010. Providence, Rhode Island.

  • Engineer of the Year from the Nebraska Section of the American Society of Agricultural and Biological Engineers (ASABE). The award is given to an ASABE member of the Nebraska Section to recognize outstanding achievement of an individual in the Agricultural and Biological Engineering field. October 2009.

  • National award in the Innovative Extension Methods and Impact Assessment category, Educational Programs Competition of the American Society of Agricultural and Biological Engineers (ASABE) for the Nebraska Agricultural Water Management Demonstration Network (NAWMDN). One or two Extension programs in the country are selected for the award; the program was evaluated on the basis of innovation, creativity, and impact.  June 2009. Reno, NV.

  • "New Holland Young Researcher Award," presented at the annual American Society of Agricultural and Biological Engineers for recognition of dedicated use of scientific methodology to seek out facts or principles significant to the agricultural engineering profession. July 2, 2008. Providence, Rhode Island

  • "Outstanding Young Scientist Award," presented by the UNL Chapter of Sigma Xi (Scientific Research Society) for "novel contributions to understanding and optimizing water use in irrigated agriculture." April 2008.

  • "Distinguished Extension New Employee Award," presented by UNL Extension for recognition of outstanding extension programming. October 2007. Grand Island, NE.

  • Gamma Sigma Delta (Agricultural Honor Society) in recognition of high scholarship, outstanding achievement or service. October 2007. Lincoln, NE.

  • "Holling Family Teaching Excellence Award," presented by the UNL Institute of Agriculture and Natural Resources (IANR) and the Nebraska College of Technical Agriculture (NCTA), the award is given to outstanding faculty for their innovation, impact and program quality in teaching. March 2007. Lincoln, Nebraska.

  • "Blue Ribbon Award," American Society of Agricultural and Biological Engineers (ASABE), in the category of Educational Publications/Factsheets, for Using Modified Atmometers (ETgage) for Irrigation Management (UNL NebGuide), July 2006.

  • "Excellent Service Award," presented by the Environmental and Water Resources Institute (EWRI) of the American Society of Civil Engineers (ASCE). The award was presented for recognition of excellent service to the 2006 EWRI World Environmental and Water Resources Congress through hard work, support and organization of the track titled "Irrigation and Drainage Engineering." May 2006. Omaha, Nebraska.

  • Best Practice Paper in the Journal of Irrigation and Drainage Engineering Award, "Solar and Net Radiation-Based Equations to Estimate Reference Evapotranspiration," published by Irmak et al., 2003. The award was presented by the Irrigation and Drainage Council of the American Society of Civil Engineers (ASCE) and Environmental and Water Resources Institute (EWRI).

  • Recognized by the American Society of Agricultural Engineers, ASAE, for being at the top 5% among the technical reviewers for showing exceptional quality in technical manuscript review for the refereed technical journals of the society in 2004.

  • "Young Researcher Award," presented by the Florida section of the American Society of Agricultural Engineers, ASAE, May 2002.

  • University of Florida Presidential Recognition Award in recognition of outstanding achievement and contributions to the University of Florida, April 2000.

  • Gamma Sigma Delta (The Honor Society of Agriculture) in recognition of high scholarship, outstanding achievement and service, March 2000.

  • Gamma Beta Chapter of Alpha Epsilon (The Honor Society of Agricultural, Food, and Biological Engineering), March 1999.