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
  • Measurement and modeling of soil moisture dynamics and soil physical properties


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

NATIONAL/INTERNATIONAL AWARDS/RECOGNITION (Major awards are capitalized)

  • “2018 ASABE EDUCATIONAL BLUE RIBBON AWARD” for the refereed article “Evapotranspiration (ET) basics and estimating actual crop ET from reference ET and crop specific coefficients.” July 30, 2018. Detroit, MI.
  • “2018 ASABE EDUCATIONAL BLUE RIBBON AWARD” for the refereed article “Simplified forms of deep percolation estimation method below the crop root zone for silt-loam soils.” July 30, 2018. Detroit, MI.
  • "2018 ASABE EDUCATIONAL BLUE RIBBON AWARD” for the refereed article “Simplified forms of surface runoff estimation method for silt‐loam soils.” July 30, 2018. Detroit, MI.
  • "2018 ASABE EDUCATIONAL BLUE RIBBON AWARD” for Nebraska Agricultural Water Management Network (NAWMN) Educational Website. July 30, 2018. Detroit, MI.
  • • “GLOBAL WATER SECURITY OF AGRICULTURE AND NATURAL RESOURCES CONFERENCE CERTIFICATE OF APPRECIATION” Presented by the American Society of Agricultural and Biological Engineers and Indian Society of Agricultural Engineers in appreciation of contributions as a Committee Co-Chair. October 3-6, Hyderabad, India.
  • “One of the Most Popular Authors in the Civil and Environmental Engineering Commons” January 5, 2018.
  • “2017 USDA-NIFA National Water and Energy Conservation Award.” November 9, 2017. Orlando, FL.
  • “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.
  • “2017 ASABE STANDARDS DEVELOPMENT AWARD” for the standard “ANSI/ASABE S626 SEP2016, Landscape Irrigation System Uniformity and Application Rate Testing” by the ASABE NRES-246 Turf and Landscape Committee. 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.
  • “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" in the Journal of Irrigation and Drainage Engineering for the refereed journal article “Impact of nitrogen fertilizer on maize evapotranspiration crop coefficients under fully irrigated, limited irrigated and rainfed settings.” Presented by the ASCE-EWRI. West Palm Beach, FL. May 25, 2016.

  • “IRRIGATION ASSOCIATION PARTNER OF THE YEAR AWARD.” November 12, 2015. Long Beach, CA.

  • "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.

  • “NASA CERTIFICATE OF SERVICE APPRECIATION” in recognition of valuable contribution and outstanding support to the Advanced Information Systems Technology (AIST) Program and the NASA Earth Science Technology Office. October, 2014.

  • "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.

  • “EXCELLENCE IN MULTISTATE RESEARCH AWARD” Presented by the Western Association of Agricultural Experiment Station Directors and U.S. Department of Agriculture’s National Institute of Food and Agriculture (NIFA) and the Experiment Station Committee on Organization and Policy for the outstanding progress and impacts of the Regional Committee W2128 Microirrigation for Sustainable Water Use. The award was given to one committee out of 200 national committees. July 13, 2014, Lake Tahoe, NV.

  • "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.

  • "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.

  • 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 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.

  • “EXCELLENCE IN AGRICULTURE AWARD” for Nebraska Agricultural Water Management Demonstration Network (NAWMDN). Presented at the 95th National Association of County Agricultural Agents (NACAA) Annual Meeting and Professional Development Conference, July 11-15, 2010. Tulsa, OK.

  • 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.

  • “MOST POPULAR ENVIRONMENTAL AND WATER RESOURCES PAPER” for the refereed journal article “Actual and reference evaporative losses and surface coefficients of a maize field during non-growing (dormant) periods.” J. Irrigation and Drainage Engineering, 135(3)313-322. American Society of Civil Engineers (ASCE)/Environmental and Water Resources Institute (EWRI), June 2009.

  • "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

  • “2008 ASABE EDUCATIONAL AIDS COMPETITION BLUE RIBBON AWARD” in the Educational Publications Category for the publication titled “Drip Irrigation Design and Management Considerations for Windbreaks.” University of Nebraska-Lincoln Extension NebGuide G07-525. Rhode Island, Providence, July 2, 2008.

  • “MOST POPULAR ENVIRONMENTAL AND WATER RESOURCES PAPER” for the refereed journal article titled “Application of SEBAL Model for Mapping Evapotranspiration and Estimating Surface Energy Fluxes in South Central Nebraska” in the J. Irrigation and Drainage Engineering, 134(3):273-285. American Society of Civil Engineers (ASCE)/Environmental and Water Resources Institute (EWRI), June 2008.

  • “2006 ASABE EDUCATIONAL AIDS COMPETITION BLUE RIBBON AWARD” in the Educational Publications Category for the publication “Using Modified Atmometers (ETgage) for Irrigation Management.” University of Nebraska-Lincoln Extension NebGuide, G05-1579. Portland, OR, 2006.

  • “EXCELLENT SERVICE AWARD” presented by the Environmental and Water Resources Institute of the American Society of Civil Engineers (ASCE-EWRI). 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." Omaha, NE, 2006.

  • “BEST PAPER AWARD” in the J. Irrigation and Drainage Engineering for the refereed journal article titled “Solar and Net Radiation-Based Equations to Estimate Reference Evapotranspiration.” ASCE-EWRI. Anchorage, Alaska, 2005.

REGIONAL/LOCAL AWARDS/RECOGNITION (Major awards are capitalized)

  • “UNL COLLEGE of ENGINEERING COLLEGE FACULTY SERVICE AWARD” recognizes outstanding individuals for service to their academic unit, college and university, as well as profession and community. April 5, 2018. Lincoln, NE.

  • “UNL College of Engineering Research Fair 1st Place Poster Award” for the poster titled “Irrigation-limited yield gaps in the US: Trends and variability post-1950” by M. Kukal and S. Irmak. April 10, 2018. Lincoln, NE.

  • “UNL DIVISION OF STUDENT AFFAIRS, THE PARENTS ASSOCIATION AND TEACHING COUNCIL’S CONTRIBUTIONS TO STUDENTS AWARD.” Recognized for making significant difference in student’s life. February 2, 2018. Lincoln, NE.

  • “UNL COLLEGE OF ENGINEERING IMPACTFUL RESEARCH AWARD.” November 9, 2017. Lincoln, NE.

  • “UNL College of Engineering Research Fair Commendation Award” for the poster titled “Comparison of variable rate and uniform irrigation and fertigation management for maize.” V. Sharma and S. Irmak. April 28, 2017. Lincoln, NE.

  • “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. Presented by UNL Extension at the UNL Extension Fall Conference, November 13, 2014. Kearney, NE.

  • “First Place Award in Poster Presentation Competition” for the poster titled “Soil-water dynamics, evapotranspiration and single and basal crop coefficients of cover crop mixtures in seed maize-cover crop rotation fields (by V. Sharma and S. Irmak).” 6th DWFI Conference. October 23, 2014. Seattle, WA.

  • “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, 2013. Lincoln, NE.

  • “CERTIFICATE OF APPRECIATION IN RECOGNITION OF SERVICE TO NEBRASKA NATIONAL GUARD AGRIBUSINESS DEVELOPMENT TEAMS (ADT1-4) SERVING IN AFGHANISTAN.” Presented by Lynn M. Heng (NE ADT2 Commander); William J. Pruisa (NE ADT3 Commander); and Donald E. Kneifl (NE ADT4 Commander). October, 2012. Lincoln, NE.

  • “2011 UNL EXTENSION EXCELLENCE IN TEAM PROGRAMMING AWARD” (Team Leader) presented by the UNL Extension to recognize the importance of interdisciplinary team efforts in achieving the goals of UNL Extension in terms of problem identification, team strategy, grant success, productivity, and impact and the output of the team in relation to inputs. November 9, 2011. Kearney, NE.

  • “OUTSTANDING YOUNG SCIENTIST AWARD.” UNL Chapter of Sigma Xi (Scientific Research Society) for "novel contributions to understanding and optimizing water use in irrigated agriculture." April 2008. Lincoln, NE.

  • “HOLLING FAMILY TEACHING EXCELLENCE AWARD.” Presented by the UNL-IANR and the Nebraska College of Technical Agriculture (NCTA). The award is given to outstanding faculty within NU's IANR and NCTA for their innovation, impact, and program quality in teaching. Lincoln, NE, 2007.

  • “DISTINGUISHED EXTENSION NEW EMPLOYEE AWARD”for recognition of outstanding extension programming. Grand Island, NE, 2007.

  • “GAMMA SIGMA DELTA (THE HONOR SOCIETY OF AGRICULTURE)” “in recognition of high scholarship, outstanding achievement or service.” Lincoln, NE, 2007.

  • “YOUNG RESEARCHER AWARD”presented by the Florida section of the American Society of Agricultural Engineers, Key West, FL, 2002.

  • “UNIVERSITY OF FLORIDA PRESIDENTIAL RECOGNITION AWARD”in recognition of outstanding achievement and contributions to the University of Florida. Presented by President Charles E. Young, President of the University of Florida. Gainesville, FL, 2000.

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

  • Competitive graduate student travel scholarship. College of Engineering, Univ. of FL, Gainesville, FL, 2000.

  • Competitive graduate student travel scholarship. College of Engineering, Univ. of FL, Gainesville, FL, 1999.

  • Florida Gamma Beta Chapter of Alpha Epsilon; The Honor Society of Agricultural, Food, and Biological Engineering, Gainesville, FL, 1999.

  • “SECOND PRIZE WINNER” ” for a Poster Presentation in Engineering and Math.” The 1999 Graduate Student Forum of the University of Florida. Gainesville, FL, 1999.

  • “OUTSTANDING GRADUATE STUDENT AWARD (1998-1999)” presented by Agricultural and Biological Engineering Department, Institute of Food and Agricultural Sciences (IFAS), Univ. of Florida. Gainesville, FL, 1999.

  • “OUTSTANDING ACADEMIC ACHIEVEMENT AWARD” presented by the College of Engineering, University of Florida. Gainesville, FL, 1999.

  • “SECOND PRIZE WINNER” for a Poster Presentation in Ecology and Environmental Sciences.” The 1998 Graduate Student Forum of the University of Florida. Gainesville, FL, 1998.