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Article

Detailed Trend Analysis of Extreme Climate Indices in the Upper Geum River Basin

1
Department of Civil Engineering, Chungnam National University, Daejeon 305-764, Korea
2
International Water Resources Research Institute, Deajeon 305-764, Korea
3
Faculty of Water Resources Engineering, Thuyloi University, Hanoi 115000, Vietnam
*
Author to whom correspondence should be addressed.
Academic Editor: Momcilo Markus
Water 2021, 13(22), 3171; https://doi.org/10.3390/w13223171
Received: 7 October 2021 / Revised: 4 November 2021 / Accepted: 8 November 2021 / Published: 10 November 2021
(This article belongs to the Section Hydrology)
To investigate the recent effects of climate change in the upper Geum River basin in South Korea, a detailed trend analysis of 17 extreme climate indices based on 33 years (1988–2020) of daily precipitation, and daily (minimum and maximum) temperature data has been analyzed in this study. Out of the 17 extreme climate indices, nine (eight) indices were based on temperature (precipitation) data. Trend analysis based on detailed temporal scales (annual, seasonal, monthly) were performed through the Mann–Kendall trend test and the Theil–Sen slope method. Furthermore, the Mann–Whitney–Pettit test was also applied in this study, to detect abrupt changes in the extreme climate indices. Based on the results of this study, the climate conditions at the upper Geum River basin for the past three decades can be summarized as follows: general increase in temperature intensity, decrease in cold duration, increased heat duration, increased precipitation intensity, and increased consecutive wet and dry durations. Furthermore, a prolonged summer season (shorter spring, and autumn periods) and precipitation shifts, were detected based on trend analysis results of seasonal, and monthly time scales. The results presented in this study can provide supplementary data for improving watershed management strategies in the upper Geum River basin. View Full-Text
Keywords: extreme climate index; Yongdam dam; trend analysis; Mann–Kendall; ETCCDI extreme climate index; Yongdam dam; trend analysis; Mann–Kendall; ETCCDI
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MDPI and ACS Style

Felix, M.L.; Kim, Y.-k.; Choi, M.; Kim, J.-C.; Do, X.K.; Nguyen, T.H.; Jung, K. Detailed Trend Analysis of Extreme Climate Indices in the Upper Geum River Basin. Water 2021, 13, 3171. https://doi.org/10.3390/w13223171

AMA Style

Felix ML, Kim Y-k, Choi M, Kim J-C, Do XK, Nguyen TH, Jung K. Detailed Trend Analysis of Extreme Climate Indices in the Upper Geum River Basin. Water. 2021; 13(22):3171. https://doi.org/10.3390/w13223171

Chicago/Turabian Style

Felix, Micah L., Young-kyu Kim, Mikyoung Choi, Joo-Cheol Kim, Xuan K. Do, Thu H. Nguyen, and Kwansue Jung. 2021. "Detailed Trend Analysis of Extreme Climate Indices in the Upper Geum River Basin" Water 13, no. 22: 3171. https://doi.org/10.3390/w13223171

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