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Open AccessArticle

Evaluation of Hydroclimatic Variability and Prospective Irrigation Strategies in the U.S. Corn Belt

1
Institute of Hydrology and Meteorology, Technische Universität Dresden, Bergstr. 66, 01069 Dresden, Germany
2
Department of Agronomy and Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, 550 Lafayette St, West Lafayette, IN 47907, USA
*
Author to whom correspondence should be addressed.
This paper is an extended version of our paper published in the EGU General Assembly 2019, Vienna, Austria, 7–12 April 2019.
Water 2019, 11(12), 2447; https://doi.org/10.3390/w11122447
Received: 8 October 2019 / Revised: 12 November 2019 / Accepted: 18 November 2019 / Published: 21 November 2019
(This article belongs to the Special Issue Agriculture Water Management and Water Saving Strategies)
Changes in climate, land use, and population growth has put immense pressure on the use of water resources in agriculture. Non-irrigated fields suffer from variable water stress, leading to an increase in the implementation of irrigation technologies, thus stressing the need to analyze diverse irrigation practices. An evaluation of 17 sites in the U.S. Corn Belt for two temporal climatic conditions was carried out. It consisted of the analysis of critical hydroclimatic parameters, and the evaluation of seven diverse irrigation strategies using the Deficit Irrigation Toolbox. The strategies included rainfed, full irrigation, and several optimizations of deficit irrigation. The results show a significant change in the hydroclimatic parameters mainly by increased temperature and potential evapotranspiration, and a decrease in precipitation with an increase in intense short rainfall events. Consequently, the simulations indicated the potential of deficit irrigation optimization strategies to increase water productivity above full irrigation and rainfed conditions. In particular, GET-OPTIS for wet soil conditions and the Decision Tables for dry soil conditions seasons. The present study highlights the contributions of atypical weather to crop production and the implications for future management options, and allows specialized regionalization studies with the optimal irrigation strategy. View Full-Text
Keywords: crop-water productivity; irrigation strategy optimization; agroclimatic resiliency; crop-climate decision tools; U.S. Corn Belt crop-water productivity; irrigation strategy optimization; agroclimatic resiliency; crop-climate decision tools; U.S. Corn Belt
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Orduña Alegría, M.E.; Schütze, N.; Niyogi, D. Evaluation of Hydroclimatic Variability and Prospective Irrigation Strategies in the U.S. Corn Belt. Water 2019, 11, 2447.

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