caa a22 4500 463208978 CHVBK 20180405153134.0 cr unu---uuuuu 170326e20070501xx s 000 0 eng 10.1007/s10705-006-9076-0 doi (NATIONALLICENCE)springer-10.1007/s10705-006-9076-0 Application of the DNDC model to tile-drained Illinois agroecosystems: model calibration, validation, and uncertainty analysis [Elektronische Daten] [Christina Tonitto, Mark David, Laurie Drinkwater, Changsheng Li] We applied the Denitrification-Decomposition (DNDC) model to a typical corn-soybean rotation on silty clay loams with tile-drainage in east-central Illinois (IL). Model outcomes are compared to 10years of observed drainage and nitrate leaching data aggregated across the Embarras River watershed. We found that accurate simulation of NO3-N leaching and drainage dynamics required significant changes to key soil physical and chemical parameters relative to their default values. Overall, our calibration of DNDC resulted in a good statistical fit between model output and IL data for crop yield, NO3-N leaching, and drainage. Our modifications to DNDC reduced the RMSE from 9.4 to a range of 1.3-2.9 for NO3-N leaching and from 51.2 to a range of 13-23.6 for drainage. Modeling efficiency ranged from 0.25 to 0.85 in comparison with measured drainage and leachate values and from 0.65 to 1 in comparison with crop yield data. However, analysis of simulation results at a monthly time step indicated that DNDC consistently underpredicted peak drainage events. Underprediction ranged from 50 to 100mmmonth−1 following three extreme precipitation events, a flux equivalent to 0.25-0.5 of the total measured monthly flux. Our simulations demonstrated high interannual variation in nitrate leaching with average annual NO3-N loss of 24kgNha−1, peak annual NO3-N loss of 58kgNha−1 and low annual NO3-N loss of 1-5kgNha−1. Springer Science+Business Media B.V., 2007 Nitrogen management nationallicence Agroecosystem model nationallicence Nitrate leaching nationallicence Tile-drainage nationallicence Corn nationallicence Soybean nationallicence Tonitto Christina Department of Horticulture, Cornell University, 14853, Ithaca, NY, USA aut David Mark Department of Natural Resources and Environmental Sciences, University of Illinois, 61801, Urbana, IL, USA aut Drinkwater Laurie Department of Horticulture, Cornell University, 14853, Ithaca, NY, USA aut Li Changsheng Complex Systems Research Center, Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, 03824, Durham, NH, USA aut Nutrient Cycling in Agroecosystems Kluwer Academic Publishers 78/1(2007-05-01), 51-63 1385-1314 78:1<51 2007 78 10705 https://doi.org/10.1007/s10705-006-9076-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10705-006-9076-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Tonitto Christina Department of Horticulture, Cornell University, 14853, Ithaca, NY, USA aut NATIONALLICENCE 700 1- David Mark Department of Natural Resources and Environmental Sciences, University of Illinois, 61801, Urbana, IL, USA aut NATIONALLICENCE 700 1- Drinkwater Laurie Department of Horticulture, Cornell University, 14853, Ithaca, NY, USA aut NATIONALLICENCE 700 1- Li Changsheng Complex Systems Research Center, Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, 03824, Durham, NH, USA aut NATIONALLICENCE 773 0- Nutrient Cycling in Agroecosystems Kluwer Academic Publishers 78/1(2007-05-01), 51-63 1385-1314 78:1<51 2007 78 10705 Metadata rights reserved Springer special CC-BY-NC licence nationallicence SWISSBIB 463208978 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer