Ayse Kilic

Ayse Kilic

  • Contact Information
  • My Story
  • Publications & Presentations
  • Background
  • Expertise & Interests
  • Advising
  • Courses Taught
  • Outreach

Title Hydrologic Information Systems Specialist
Address 311 Hardin Hall
3310 Holdrege Street
Lincoln NE
Phone 402-417-2562
FAX 402-472-2946
E-mail akilic3@unl.edu
Vitae Download file
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Hi, I'm Ayse Kilic, associate professor of Civil Engineering, and a faculty member at the Center for Advanced Land Management Information Technologies (CALMIT), which is based in the School of Natural Resources. Before joining the School of Natural Resources in 2007, I was a research assistant professor in UNL's Department of Biological Systems Engineering, and a post-doc at the University of Florida in Gainesville.

The main focus of my research interests is in the application of remote sensing to estimate land surface evapotranspiration (ET). The more dependable and universal satellite-based models employ a surface energy balance (EB) where ET is computed as a residual of surface energy. I and my research team are using SEBAL and METRIC models which use the CIMEC approach (Calibration using Inverse Modeling of Extreme Conditions). Recently, I have been studying land-water-atmosphere interactions to understand the impacts of land use/land cover (LULC) change on local to regional hydrology in the U.S. High Plains. The goal of this research is to fingerprint the anthropogenic forcing/signatures of LULC, change and discriminate among the causes of natural climate variability, for better understanding of past climate variations.

Ayse Irmak in field with research project.
Ayse Kilic in the field with a research project.

I am also working in surface water hydrology, and in particular in the application of geographic information systems (GIS) to hydrology. I'm working on development of the Nebraska Hydrologic Information System (HIS), which is designed to provide improved access to evapotranspiration and other hydrologic data, and synthesis into a digital watershed.

HIS is going to be one of the first tools available that will allow farmers/decision makers to check the ET rates for their individual fields, down to a resolution of 30 meters. This line of research can help decision-makers at all levels to understand what kind of water management practices might be needed to ensure that groundwater use is sustainable. More information about my research can be found on my home page: http://snr.unl.edu/kilic/

I've been involved in teaching GIS, hydrology and water resources courses at the university level. I teach the following courses regularly: (1) Introduction to Geospatial Information (NRES 312) every fall and spring and (2) GIS in Water Resources (CIVE 898) every fall. I co-teach the GIS in Water Resources course together with the University of Texas at Austin and Utah State University. The course is captured on streaming video, and the most recent offering of this course, in Fall 2006, can be viewed at http://snr.unl.edu/kilic/giswr/2010/

Ayse Kilic and family in 2009 at the castle of Kizkalesi (Corycus). The castle was built  in the 12th century.
Ayse Irmak and family in 2009 at the castle of Kizkalesi (Corycus). The castles was built in the 12th century.

I am a member of the American Society of Civil Engineers (ASCE)-Environmental and Water Resources Institute (EWRI) of (a) Crop Coefficient Task Committee and (b) Standardization of Reference Evapotranspiration in Irrigation Hydrology Task Committee. I am also serving in the ASABE-SW-244/Standardization Committee for ASAE EP505 Weather Station Instrumentation and Measurement and Reporting Practices for Automated Agricultural Weather Stations.

Selected Publications

Irmak, Suat, Ayse Kilic, Sumantra Chatterjee. 2014. On the Equality Assumption of Latent and Sensible Heat Energy Transfer Coefficients of the Bowen Ratio Theory for Evapotranspiration Estimations: Another Look at the Potential Causes of Inequalities. Climate 2(3):185-204.
Mutiibwa, D., A. Kilic, and S. Irmak. 2014. Identifying the fingerprints of the anthropogenic component of land use/land cover changes on regional climate of the USA High Plains. Great Plains Journal (submitted).
Mutiibwa, Denis, Ayse Kilic, and Suat Irmak. 2014. The effect of land cover/land use changes on the regional climate of the High Plains. Climate 2014, 2(3): 153-167 doi:10.3390/cli20x000x
Roy, D.P.; Wulder, M.A.; Loveland, T.R.; Woodcock, C.E.; Allen, R.G.; Anderson, M.C.; Helder, D.; Irons, J.R.; Johnson, D.M.; Kennedy, R.; Scambos, T.A.; Schaaf, C.B.; Schott, J.R.; Sheng, Y.; Vermote, E.F.; Belward, A.S.; Bindschadler, R.; Cohen, W.B.; Gao, F.; Hipple, J.D.; Hostert, P.; Huntington, J.; Justice, C.O.; Kilic, A.; Kovalskyy, V.; Lee, Z.P.; Lymburner, L.; Masek, J.G.; McCorkel, J.; Shuai, Y.; Trezza, R.; Vogelmann, J.; Wynne, R.H.; Zhu, Z. Landsat-8: Science and product vision for terrestrial global change research. 2014. Remote Sensing of Environment 145:154-172.
Wang, Shih-Yu, Joseph Santanello; Hailan Wang; Daniel Barandiaran; Rachel Pinker; Siegfried Schubert; Robert Gillies; Robert Oglesby; Kyle Hilburn; Ayse Kilic; Paul Houser. 2014. An enhanced seasonal transition that intensified summer drought in the central U.S. J. Climate. Accepted.
Allen, R.G., B. Burnett, W. Kramber, J. Huntington, J. Kjaersgaard, A. Kilic-Irmak, C. Kelly, R. Trezza. 2013. Automated Calibration of the METRIC-Landsat Evapotranspiration Process. J. Am. Water Resources Assoc. 49(3):563-576
Allen, R.G., R. Trezza, A. Kilic-Irmak, M. Tasumi, H. Li. 2013. Sensitivity of Landsat-scale energy balance to aerodynamic algorithms in mountains and complex terrain. J. Am. Water Resources Assoc. 49(3):592-604
Gengxin O., X. Chen, A. Kilic, S. Bartelt-Hunt, Y. Li, & A. Samal. "Development of a cross-section based streamflow routing package for MODFLOW." Environmental Modelling & Software 50 (2013): 132-143.
Kamble, B., A. Irmak (Kilic), K.G. Hubbard, & P. Gowda. 2013. Irrigation scheduling using remote sensing data assimilation approach" Advances in Remote Sensing 2 (2013): 258. DOI: 10.4236/ars.2013.23028
Kamble, B., A. Kilic, & K. Hubbard. 2013. Estimating Crop Coefficients Using Remote Sensing-Based Vegetation Index. Remote Sens. 5:1588-1602.
Lagos, L. O., D.L. Martin, D. L., S.B. Verma, S. Irmak, A. Irmak (Kilic), D. Eisenhauer, & A. Suyker. 2013. Surface energy balance model of transpiration from variable canopy cover and evaporation from residue-covered or bare soil systems: model evaluation. Irrigation Science, 31(2), 135-150
Sharma, V., A. Irmak (Kilic), S. Irmak, and I. Kabenge*. 2012. Application of GIS to evaluate the spatial nonstationarity relationships between precipitation vs. irrigated and rainfed maize and soybean yields. Trans. ASABE Vol. 54(3): 953-972.
Allen, R.G., A. Irmak (Kilic), R. Trezza, J. Hendrickx, W. Bastiaanssen, and J. Kjaersgaard. 2011. Satellite based ET estimation in agriculture using SEBAL and METRIC. J. Hydrological Processes. 25:4011–4027
Healey, N.C., A. Irmak (Kilic), T.J. Arkebauer, D.P. Billesbach, J.D. Lenters, K.G. Hubbard, R.G. Allen, J. Kjaersgaard. 2011. Remote Sensing and In Situ-Based Est. of Evapotranspiration for Subirrigated Meadow, Dry Valley, and Upland Dune Ecosystems in the Semi-arid Sand Hills of NE, USA. Irrigation and Drainage Systems 25(3):151-178.
Healey, N.C., A. Irmak, K.G. Hubbard, J.D. Lenters. 2011. Environmental variables controlling site suitability for corn-based ethanol production in Nebraska. Biomass and Bioenergy 35(7): 2852-2860.
Irmak (Kilic), A., I. Ratcliffe, P. Ranade, K.G. Hubbard, R.K. Singh, B. Kamble and J. Kjaersgaard. 2011. Estimation of land surface evapotranspiration: A satellite remote sensing procedure. Great Plains Research. 21(1):73-88, April 2011.
Irmak, (Kilic) A., R.K. Singh, E. Walter-Shea, S.B. Verma and A.E. Suyker. 2011. Comp. and Anal. Empirical Equ. for Soil Heat Flux for Different Cropping Sys. and Irrig. Methods. Trans. ASABE. 54(1): 67-
Kjaersgaard, J., R.G. Allen and A. Irmak (Kilic). 2011. Improved methods for estimating monthly and growing season ET estimation using METRIC applied to moderate-resolution satellite imagery. J. Hydrological Processes. 25:4028–4036.
Lagos, L.O., D.L. Martin, S.B. Verma, S. Irmak, A. Irmak (Kilic), D.E. Eisenhauer, and A. Suyker. 2011. Surface energy balance model of transpiration and evaporation from residue-covered or bare-soil systems: Model evaluation. Irrigation Science, (on-line) Aug. 2011. DOI10.1007/s00271-011-0298-9.
Lenters, J.D., G.J. Cutrell, E. Istanbulluoglu, D.T. Scott, K.S. Herrman, A. Irmak, D.E. Eisenhauer. 2011. Seasonal energy and water balance of a Phragmites australis-dominated wetland in the Republican River basin of south-central Nebraska (USA). Journal of Hydrology 408(1-2): 19-34.
Singh, R. K., and A. Irmak (Kilic). 2011. Treatment of anchor pixels in METRIC model for improved sensible and latent heat fluxes in a semi-arid region. Hydrological Sciences Journal 56(5): 895–906.
Singh, R.K., A. Irmak (Kilic), E. Walter-Shea, S.B. Verma and A.E. Suyker. 2011. Spectral data-based estimation of soil heat flux. Transactions of the ASABE 54(5): 1589-1597.
Irmak (Kilic), A., Ranade, P., D. Marx, K.G. Hubbard, S. Irmak, G. Meyer, and D.L. Martin. 2010. Spatial interpolation of climate variables in Nebraska. Trans. ASABE 53(6): 1759-1771.
Irmak, A., Singh, R.K., E. Walter-Shea, S. Verma, and A.E. Suyker. 2010. Comparison and analysis of empirical equations for different cropping systems and irrigation methods. Trans. ASABE 54(1).
Irmak, A., and B. Kamble. 2009. Evapotranspiration Data Assimilation with Genetic Algorithms and SWAP Model for On-demand Irrigation. Irrigation Science. 28:101-112 (DOI 10.1007/s00271-009-0193-9).
Irmak, S., D. Mutiibwa, A. Irmak, T.J. Arkebauer, A. Weiss, D.L. Martin, and D.E. Eisenhauer. 2008. On the scaling up leaf stomatal resistance to canopy resistance using photosynthetic photon flux density. Agricultural and Forest Meteorology 148:1034-1044.
Singh R., and A. Irmak. 2009. Estimation of Crop Coefficients Using Satellite Remote Sensing. J. Irrig. And Drain. Eng., ASCE 135(5): 597-608 (DOI 10.1061/(ASCE)IR.1943-4774.0000052).
Irmak, A., and S. Irmak. 2008. Reference and crop evapotranspiration in south central Nebraska: II. Measurement and estimation of actual evapotranspiration. J. Irrig. And Drain. Eng., ASCE 134(6):700-715.
Irmak, A., S. Irmak, and D.L. Martin. 2008. Reference and crop evapotranspiration in south central Nebraska: I. Comparison and analysis of grass and alfalfa-reference evapotranspiration. J. Irrig. And Drain. Eng., ASCE 134(6):690-699.
Irmak, S., E. Istanbulluoglu, and A. Irmak. 2008. An evaluation of evapotranspiration model complexity versus performance in comparison with Bowen ratio energy balance measurements. Transactions of the ASABE 51(4):1295-1310.
Singh, R.K., A. Irmak, S. Irmak and D.L. Martin. 2008. Application of SEBAL for mapping evapotranspiration and estimating surface energy fluxes in south central Nebraska. J. Irrig. And Drain. Eng., ASCE 134(3):273-285.
Irmak, A., 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 49(3):811-818.
Irmak, A., J.W. Jones, W.D. Batchelor, S. Irmak, K.J. Boote, and J.O. Paz. 2006. Artificial neural network model as a data analysis tool in precision farming. Transactions of the ASABE 49(6):2027-2037.
Irmak, S., A. Irmak, T.A. Howell, D.L. Martin, J.O. Payero, and K.S. Copeland. 2008. Variability of alfalfa-reference to grass-reference evapotranspiration ratios in growing and dormant seasons. J. Irrig. And Drain. Eng., ASCE 134(2):147-159.

Educational Background

  • BE - Cukurova University, Adana, Turkey, Agricultural Structures and Irrigation Engineering (1993)
  • ME - Mediterranean (Akdeniz) University, Antalya, Turkey, Agricultural Structures and Irrigation Engineering (1995)
  • ME - University of Florida, Agricultural and Biological Engineering (1998)
  • PhD - University of Florida, Agricultural and biological Engineering with minors in Urban and Regional Planning and Computer Information Science and Engineering (2002)


  • 2014 William T Pecora Award awarded by National Aeronautics and Space Administration and the United States Geologic Survey 
  • Recognition of Junior Faculty for Excellence in Research Award. awarded by UNL-Agricultural Research Division  
  • – NASA Nebraska Space Grant & EPSCoR certificate of recognition awarded by Nebraska Academy of Science 
  • 2010 – Best Honorable Mention Paper Award awarded by Irrigation and Drainage Council of the American Society of Civil Engineers-Environmental and Water Resources Institute (ASCE-EWRI) 
  • 2010 – Best Honorable Mention Paper Award awarded by Irrigation and Drainage Council of the American Society of Civil Engineers-Environmental and Water Resources Institute (ASCE-EWRI) 
  • 2010 – Best Honorable Mention Paper Award awarded by Irrigation and Drainage Council of the American Society of Civil Engineers-Environmental and Water Resources Institute (ASCE-EWRI) 
  • 2008 [June] – Popular Environmental and Water Resources Paper awarded by the American Society of Civil Engineers (ASCE)/Environmental and Water Resources Institute (EWRI) 
  • 2006 – ASABE Honorable Mention Paper Award awarded by American Society of Agricultural and Biological Engineers Society 
  • 2005 – Best Practice Paper Award in the Journal of Irrigation and Drainage Engineering Award awarded by Irrigation and Drainage Council of the American Society of Civil Engineers (ASCE) and Environmental and Water Resources Institute (EWRI), Anchorage, Alaska 
  • 2004 – Second prize winner for the graduate student paper competition awarded by Soil and Crop Science Society of Florida Meetings 
  • 2003 [May] – Young Researcher Award awarded by Florida Section of the American Society of Agricultural Engineers, ASAE 
  • 2001 – Outstanding 2001 ASAE annual meeting paper award (IET section) awarded by ASAE Annual International Meetings. Sacramento, California 
  • 2000 – University of Florida Presidential Recognition Award awarded by University of Florida 

SNR Mission Area(s)

  • Environmental Science

Affiliations (index)

Professional Organizations

  • American Geophysical Union
  • American Society of Civil Engineers
    • Chair, Task Committee on Remote Sensing of Evapotranspiration, Member, Evapotranspiration in Irrigation and Hydrology Technical Committee 
  • USGS/NASA Landsat Science Team
    • Full Member 2012-2017

Notable Websites

Other Areas of Interest

GIS in Water Resources, Evapotranspiration, Remote Sensing, Climate Change, Hydrology, Crop Modeling

SNR Areas of Expertise

Graduate Program(s)

Master of Science in Natural Resource Sciences

including specializations in
  • Geographic Information Systems
  • Remote Sensing

Doctor of Philosophy in Natural Resource Sciences