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Article

Relative Contribution of Climate Change and Anthropogenic Activities to Streamflow Alterations in Illinois

1
Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
2
Department of Environmental Engineering, Seoul National University of Science and Technology, Seoul 01811, Korea
3
Illinois State Water Survey, Prairie Research Institute, Urbana, IL 61801, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Maria Mimikou
Water 2021, 13(22), 3226; https://doi.org/10.3390/w13223226
Received: 5 October 2021 / Revised: 8 November 2021 / Accepted: 12 November 2021 / Published: 14 November 2021
Rainfed agricultural systems have become more vulnerable to climate change due to their significant dependence on natural precipitation. Drastic changes in precipitation, superimposed with anthropogenic activities, including land use land cover change, can modify the hydrologic response, especially in agricultural watersheds. In this study, Fisher Information and cumulative sum charts (CUMSUM) methods were applied to detect the hydrologic regime shifts in six watersheds in Illinois, USA. The regime shift analysis identified shifts in streamflow regime in three agricultural watersheds, mainly around the 1970s; whereas, no significant change in streamflow was observed for forest-dominated watersheds. Furthermore, the Budyko framework was used to determine the relative contribution in streamflow alterations (i.e., regime shifts in streamflow) for the agricultural watersheds, which evidenced significant shifts in streamflow. The Budyko analysis inferred that alterations in streamflow could be primarily attributed to anthropogenic activities with a comparatively lower contribution from climate in agricultural watersheds. The relative contribution from anthropogenic activities were 71.66%, 81.46%, and 74.04%; whereas, the relative contribution from climate were 28.34%, 18.54%, and 25.96% for the Sangamon, Vermillion, and Skillet agricultural watersheds, respectively. The techniques used and the results obtained from the study would be helpful for future research in assessing the vulnerability and impact of management practices in a highly managed agricultural watershed. View Full-Text
Keywords: Budyko; CUMSUM; climate change; fisher information; regime shifts Budyko; CUMSUM; climate change; fisher information; regime shifts
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MDPI and ACS Style

Khan, M.; Dahal, V.; Jeong, H.; Markus, M.; Bhattarai, R. Relative Contribution of Climate Change and Anthropogenic Activities to Streamflow Alterations in Illinois. Water 2021, 13, 3226. https://doi.org/10.3390/w13223226

AMA Style

Khan M, Dahal V, Jeong H, Markus M, Bhattarai R. Relative Contribution of Climate Change and Anthropogenic Activities to Streamflow Alterations in Illinois. Water. 2021; 13(22):3226. https://doi.org/10.3390/w13223226

Chicago/Turabian Style

Khan, Manas, Vaskar Dahal, Hanseok Jeong, Momcilo Markus, and Rabin Bhattarai. 2021. "Relative Contribution of Climate Change and Anthropogenic Activities to Streamflow Alterations in Illinois" Water 13, no. 22: 3226. https://doi.org/10.3390/w13223226

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