Quantification of Land surface energy fluxes through satellite remote sensing and in-situ measurements;

Estimation of Evapotranspiration from riparian and invasive species using aerial and satellite remote sensing;

Measurement of growing season actual evapotranspiration and crop coefficients, and dormant season evaporative losses for key vegetation surfaces in the Central Platte Natural Resources District;

Modeling to determine the impacts of terraces and small reservoirs on water supplies and hydrological balances in the Republican River Basin;

Computer simulation of crop production, soil water processes; and

Developing knowledge-based inverse modeling techniques to parameterize complex biophysical simulation models.

• Ph.D., Major in Agricultural and Biological Engineering, University of Florida, Gainesville, Florida, May 2002.
• M.E., Agricultural and Biological Engineering, University of Florida, Gainesville, Florida, 1998.
• B.E., Agricultural Structures and Irrigation Engineering, Cukurova, University. Adana, Turkey, 1993.

• Assistant Professor, School of Natural Resources and Civil Engineering, University of Nebraska-Lincoln, (8/2007-present).
• Research Assistant Professor, Biological Systems Engineering, University of Nebraska-Lincoln, (2004-7/2007).
• Postdoctoral Research Associate, Agricultural and Biological Engineering Department, University of Florida. Gainesville, FL (06/2002–12/2003).
• Graduate Research & Teaching Assistant, Agricultural and Biological Engineering Department, University of Florida. Gainesville, FL, (08/1998–05/2002).

• 2006. ASABE Honorable Mention Paper Award given in recognition of authorship of a contribution to agricultural engineering literature of exceptional merit, as published by the American Society of Agricultural and Biological Engineers society.
• 2005, Best practical paper award, Irrigation and Drainage Engineering Journal. ASCE/EWRI National Society Award.
• 2004, Second prize winner for the graduate student paper competition award at Soil and Crop Science Society of Florida Meetings. 2004. Daytona Beach, FL. "Adapting the CROPGRO Model to Predict Growth and Composition of Tropical Grasses: Developing Physiological Parameters" by S. J. Rymph, K. J. Boote, A. Irmak, P. Mislevy, and G. W. Evers
• 2003, Young Researcher Award presented by the Florida Section of the American Society of Agricultural Engineers, ASAE, May 2003.
• 2001, Outstanding 2001 ASAE annual meeting paper award (IET section). 2001 ASAE Annual International Meetings. Sacramento, California.
• 2000, "University of Florida Presidential Recognition Award" for academic achievement and contributions to the University of Florida.
• 2000, "Third Prize Winner for a Poster Presentation in Agricultural & Environmental Sciences". The 2000 Graduate Student Forum of the University of Florida.
• 1999, University of Florida's nominee for the 1999 Master's Thesis Award of the Conference of Southern Graduate Schools.
• 1999, "Third Prize Winner for a Poster Presentation in Engineering and Math". The 1999 Graduate Student Forum of the University of Florida.
• 1999, Florida Gamma Beta Chapter of Alpha Epsilon (The Honor Society of Agricultural, Food, and Biological Engineering).
• "The most articulate" award from Language Institute for English. 1996. Stetson University. Deland, Florida

• Sing, R., A. Irmak, S. Irmak, and D.L. Martin., 2007, "Application of SEBAL for mapping evapotranspiration and estimating surface energy fluxes in south central Nebraska.," Journal of Irrigation and Drainage Engineering, ASCE (accepted).
• Irmak, A. and S. Irmak, 2007, "Reference and crop evapotranspiration in south central Nebraska: II. Measurement and estimation of actual evapotranspiration," Journal of Irrigation and Drainage Engineering (Accepted).
• Irmak, A., S. Irmak, and D.L. Martin, 2007, "Reference and crop evapotranspiration in south central Nebraska: I. Comparison and analysis of grass and alfalfa-reference evapotranspiration," Journal of Irrigation and Drainage Engineering (Accepted).
• A. Irmak, 2007, "Operational aspects of remote sensing-based energy balance models for estimating surface energy fluxes in Great Plains," Journal of Irrigation and Drainage Engineering, ASCE (submitted).
• Irmak, S., E. Istanbulluoglu, and A. Irmak, 2007, "An evaluation of evapotranspiration model complexity versus performance in comparison with Bowen ratio energy balance latent heat measurements," Transactions of the ASABE (submitted).
• Irmak, S., D. Mutiibwa, A. Irmak, T.J. Arkebauer, A. Weiss, D.L. Martin, and D.E. Eisenhauer, 2007, "On scaling up leaf stomatal resistance to canopy resistance using photosynthetic photon flux density," Agricultural and Forest Meteorology (in print).
• Irmak, S., A. Irmak, D.L. Martin, J.O. Payero, T.A. Howell, and K.S. Copeland, 2006, "Variability analyses of alfalfa-reference to grass-reference evapotranspiration ratios of commonly used combination equations.," Journal of Irrigation and Drainage Engineering (accepted). Journal of Irrigation and Drainage Engineering (accepted).
• A. Irmak, J.W. Jones, W.D. Batchelor, S. Irmak, J.O. Paz and K.J. Boote, 2006, "Analysis of spatial yield variability using a combined crop model-empirical approach.," Transactions of the ASABE. Vol. 49(3):811-818
• Irmak, S., A. Irmak, J.O. Payero, D.L. Martin, and T.A. Howell, 2006, "Sensitivity analyses and sensitivity coefficients of the standardized ASCE-Penman-Monteith equation to climate variables." J. Irrig. and Drain. Eng., ASCE. 132:6 (564).
• A. Irmak, J.W. Jones, W.D. Batchelor, S. Irmak, J.O. Paz and K.J. Boote, 2006, "Subsurface-flow constructed wetlands treatment in the plains: five years of experience." Transactions of the ASABE. Vol. 49(6): 2027−2037.
• A. Irmak, J.W. Jones and S. S. Jagtap, 2005, "Evaluation of the CROPGRO-Soybean model for Assessing Climate Impacts on Regional Soybean Yields," Transactions of the ASAE. Vol. 48(6):2343-2353.
• Irmak, S. and A. Irmak, 2005, "Performance of Frequency-Domain, Capacitance, and Psuedo-Transit Time-Based Soil Water Content Probes in Four Coarse-Textured Soils," Applied Engineering in Agriculture, ASAE. 21(6):999-1008. UNL-ARD Journal Series No. 14993.
• Irmak, S., D.Z. Haman, A. Irmak, J.W. Jones, B. Tonkinson, D. Burch, T.H. Yeager, and C. Larsen, 2005, "Root-zone temperatures of V. odoratissimum grown in the MPBS and Conventional Systems: Measurement and analyses of temperature profiles and predicting root-zone temperatures," J. Amer. Soc. Hort. Sci. 40(3):808-818. UNL-ARD Journal Series No. 14851.
• Irmak, S., A. Irmak, and J.W. Jones, 2004, "Predicting multiple layers of bare soil temperatures: A model evaluation and modifications for sandy soils," Soil and Crop Sci. Soc. of Florida, 62:20-29.
• Irmak, S., D. Z. Haman, A. Irmak, J. W. Jones, K.L. Campbell, and T. L. Crisman, 2004, "Measurement and analyses of growth and stress parameters of Viburnum Odoratissimum (Ker-gawl) grown in MPBS," J. Amer. Soc. Hort Sci. 39(6):1445-1455.
• Rymph, S.J., Boote, K.J., Irmak, A., Mislevy, P., Evers, G.W., 2004, "Adapting the CROPGRO model to predict growth and composition of tropical grasses: developing physiological parameters," Proc. Soil Crop Sci. Soc. Florida 63, 37-51.
• Irmak, S. D. Z. Haman, A. Irmak, J. W. Jones, T. H. Yeager, and K. L. Campbell, 2003, "New irrigation-plant production system for water conservation in ornamental nurseries: Quantification and evaluation of irrigation, runoff, plant biomass, and irrigation efficiencies," Applied Engineering in Agriculture, ASAE 19(6):651-655.
• Irmak, S., A. Irmak, J.W. Jones. T.A. Howell, J.M. Jacobs, R.G. Allen, and G. Hoogenbom, 2003, "Predicting daily net radiation using minimum climatological data," Journal of Irrigation and Drainage Engineering, ASCE, 129(4):256-269.
• Irmak, S., A. Irmak, R.G. Allen, and J.W. Jones, 2003, "Solar and net radiation-based equations to estimate reference evapotranspiration in humid climates," Journal of Irrigation and Drainage Engineering, ASCE 129(5):336-347.
• A. Irmak, W.D. Batchelor, J.W. Jones, S. Irmak, J.O. Paz, H. Beck, and M. Engel, 2002, "Relationship between plant available soil water and yield for explaining within-field soybean yield variability," Applied Engineering in Agriculture 18(4) 471-482.
• A. Irmak, J.W. Jones, W.D. Batchelor and J.O. Paz, 2002, "Linking multi-variables for diagnosing causes of spatial yield variability in soybean," Transactions of the ASAE 45(3): 839-849.
• A. Irmak, J.W. Jones, W.D. Batchelor and J.O. Paz, 2001, "Estimating spatially variable soil properties for crop model use in precision farming," Transactions of the ASAE 42(6):1867-1877.
• Irmak, S., A. Irmak, and J.W. Jones, 2002, "Predicting multiple depths of bare soil temperatures: A model evaluation and modifications for sandy soils," Soil and Crop Sci. Soc. of Florida (in print).
• Mavromatis, T., K.J. Boote, J.W. Jones, A. Irmak, D. Shinde, and G. Hoogenboom, 2001, "Developing genetic coefficients for crop simulation models with data from crop performance trials,"Crop Science. 41: 40-51.
• A. Irmak, J.W. Jones, W.D. Batchelor and J.O. Paz, 2001, "Estimating spatially variable soil properties for crop model use in precision farming," Transactions of the ASAE 42(6):1867-1877.

• A. Irmak, 2008, "Estimation of land surface energy fluxes: an application of satellite remote sensing procedure," Proc. of the ASCE-EWRI Word Environmental Water Resources Congress. May 12-16, 2007. Honolulu, Hawai.
• A. Irmak, R. Sing, S. Irmak, and D.L. Martin, 2007, "Satellite remote sensing based estimation of land surface evapotranspiration in Great Plains,"2007 ASABE Annual International Meetings. Minnesota, MI. June 14-17.
• Singh, R.K., A. Irmak, S. Irmak, and D.L. Martin, 2007, "The satellite-remote sensing based estimation of land surface evapotranspiration in Great Plains," Proc. of the ASCE-EWRI Word Environmental Water Resources Congress. May 15-19, 2007. Tampa, Florida.
• Irmak, S., D. Mutiibwa, A. Irmak, T.J. Arkebauer, A. Weiss, D.L. Martin, and D.E. Eisenhauer, 2007, "Scaling up of leaf stomatal resistance to canopy resistancer,"ASABE Paper No. 07-2297. 2007 ASABE Annual International Meeting, Minneapolis, Minnesota, 17-20 June 2007.
• A. Irmak, D.E. Martin,and J.K. Koelliker and D. E. Eisenhauer, 2006, "Modeling the effects of terracing on water supplies in the Medicine Creek, Nebraska," 2006 ASABE Annual International Meetings. Portland, Oregon. Paper #:062291.
• A. Irmak, D. Martin,and S. Irmak, 2006, "Developing Irrigation Management Decisions Using Crop Growth Model," 2006 ASABE Annual International Meetings. Portland, Oregon.
• A. Irmak, D.E. Martin,and J.K. Koelliker and D. E. Eisenhauer, 2006, "Modeling the Effects of Terracing on Water Supplies in the Republican River Basin," Water Colloquium, October 27, 2006. Embassy Suites.Lincoln, Nebraska.
• A. Irmak, D.E. Martin,and S. Irmak, 2006, "In-Season Irrigation Strategies Using Crop Models," Geospatial and Precision Technologies Brown Bag Seminar. Lincoln, Nebraska
• A. Irmak, J. Payero, S. Melvin, S. Irmak, and D. Martin, 2005, "Use of crop growth model to develop deficit irrigation management strategies in Nebraska," 2005 ASAE Annual International Meetings. Tampa, FL.
• A. Irmak, J.W. Jones J. Sadler, K. A. Sudduth, 2005, "Determining spatial soil properties by objective parameterization of the CERES-Maize model. A crop-modeling approach and its experimental verification (Abstract)," 2005 International Annual American Society of Agronomy Meetings. Salt Lake City, UT.
• A. Irmak, J.W.Jones, and S.S. Jagtap, 2003, "Evaluating Methods for using Crop Models to Predict Climate Impacts on Regional Soybean Yields,"2003 ASAE Annual International Meetings. Las Vegas, Nevada.
• A. Irmak, 2001, "Opportunities and Challenges in the International Research Agenda. Mini Symposium," CIMMYT, Mexico City. Mexico. June 30- July 4. 2001.
• A. Irmak, J.W. Jones, W.D. Batchelor and J.O. Paz, 2001, "Linking multiple layers of information for diagnosing causes of spatial yield variability in soybean." 2001 ASAE Annual International Meetings. Sacramento, California. Paper No. 01-3117, July 29-1 August 2001.
• A. Irmak, J.W. Jones, and W.D. Batchelor, 2000, "Linking soil variability to variable water stress in soybeans." 2000 ASAE Annual International Meetings. Milwaukee, WI. Paper No. 00-3037, July 9-12 2000.

• CIVE 898. GIS in Water Resources.
• NRES 312 Introduction to Geospatial Information Technology.

• Affiliations:
• American Geophysical Union (AGU)
• American Society of Agricultural Engineers (ASABE)
• American Society of Civil Engineers (ASCE)
• American Society of Agronomy (ASA)


• Journal Referee:
• Transactions of ASAE (ASABE)
• Applied Engineering in Agriculture (ASABE)
• Water Resources Research, AGU
• Journal of Irrigation and Drainage Engineering, ASCE
• Agronomy Journal (ASA)


• Committees:
• Review Panelist for 2007 USDA-NRI. Soil Processes. May 2007.
• Session Chair/Moderator: ASABE IET-2. Modeling of crop and farm systems.
• Task Committees on ASCE/EWRI Evapotranspiration in Irrigation and Hydrology Task Committees on ASCE/EWRI Crop Coefficient.
• Member of IET-254. Emerging Information Systems. ASABE.

• Principle Investigator: Ayse Irmak
• Co- Investigators: Donald Rundquist, Sunil Narumalani, Gary Hergert, and Gary Stone
• Proposal Title: Satellite-based Energy Balance to Assess Riparian Water Use
• Source of Support: USGS 104B via UNL Water Center
• Total Award Period Covered: 03/2008-02/2009


• Principle Investigator: Suat Irmak
• Co- Investigators: Ayse Irmak, Derrel Martin, and Shashi Verma
• Project/Proposal Title: Measurement of growing season actual crop evapotranspiration and crop coefficients, and dormant season evaporative losses for key vegetation surfaces in the Central Platte Natural Resources District
• Source of Support: Nebraska Central Platte Natural Resources District (CPNRD)
• Total Award Period Covered: 07/2007-12/2011


• Principle Investigator: Derrel Martin
• Co- Investigators: S. Verma, Tala Awada, Ayse Irmak, and Suat Irmak
• Project/Proposal Title: Estimation of Evapotranspiration from Riparian and Invasive Species Using Remote Sensing and in Situ Measurements in the Republican River Basin
• Source of Support: Nebraska Department of Natural Resources (DNR)
• Total Award Period Covered: 01/02/2007-12/31/2011


• Principle Investigator: Gary W. Hergert
• Co- Investigators: Ayse Irmak, Richard G. Allen and Masahiro Tasumi
• Project/Proposal Title: Demonstrate and adapt remote sensing technology to produce and utilize consumptive water use maps for the Nebraska Panhandle
• Source of Support: Nebraska North and South Platte Natural Resources District (SPNRD, NPNRD)
• Total Award Period Covered: 08/01/2006 -07/31/2009


• Principle Investigator: Suat Irmak
• Co- Investigators: Ayse Irmak, Ronald E. Yoder, Donald C. Rundquist, Dean E. Eisenhauer, Simon VanDonk, Gary L. Zoubek, Jennifer M. Rees, Darrel D. Siekman, and Paul J. Jasa
• Project/Proposal Title: Coupling field measurements, remote sensing/satellite data and geographical information system to quantify crop evapotranspiration under different tillage practices
• Source of Support: Environmental Trust Fund
• Total Award Period Covered: April 2008 – April 2011