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Article

Projection of Hydro-Climatic Extreme Events under Climate Change in Yom and Nan River Basins, Thailand

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Department of Civil Engineering, Faculty of Engineering, King Mongkut’s University of Technology Thonburi, 126 Prachautit Rd., Bangkok 10140, Thailand
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Department of Water Resources Engineering and Disaster and Risk Management Information Systems Research Group, Faculty of Engineering, Chulalongkorn University, Phayathai Road Pathumwan, Bangkok 10330, Thailand
*
Author to whom correspondence should be addressed.
Academic Editors: Juan Antonio Ballesteros Canovas and Achim A. Beylich
Water 2021, 13(5), 665; https://doi.org/10.3390/w13050665
Received: 16 November 2020 / Revised: 12 February 2021 / Accepted: 25 February 2021 / Published: 28 February 2021
(This article belongs to the Section Hydrology)
Due to a continuous increase in global temperature, the climate has been changing without sign of alleviation. An increase in the air temperature has caused changes in the hydrologic cycle, which have been followed by several emergencies of natural extreme events around the world. Thailand is one of the countries that has incurred a huge loss in assets and lives from the extreme flood and drought events, especially in the northern part. Therefore, the purpose of this study was to assess the hydrological regime in the Yom and Nan River basins, affected by climate change as well as the possibility of extreme floods and droughts. The hydrological processes of the study areas were generated via the physically-based hydrological model, namely the Soil and Water Assessment Tool (SWAT) model. The projected climate conditions were dependent on the outputs of the Global Climate Models (GCMs) as the Representative Concentration Pathways (RCPs) 2.6 and 8.5 between 2021 and 2095. Results show that the average air temperature, annual rainfall, and annual runoff will be significantly increased in the intermediate future (2046–2070) onwards, especially under RCP 8.5. According to the Flow Duration Curve and return period of peak discharge, there are fluctuating trends in the occurrence of extreme floods and drought events under RCP 2.6 from the future (2021–2045) to the far future (2071–2095). However, under RCP 8.5, the extreme flood and drought events seem to be more severe. The probability of extreme flood remains constant from the reference period to the near future, then rises dramatically in the intermediate and the far future. The intensity of extreme droughts will be increased in the near future and decreased in the intermediate future due to high annual rainfall, then tending to have an upward trend in the far future. View Full-Text
Keywords: climate change impact; hydrological model; SWAT model; flood; drought; Yom and Nan river basins climate change impact; hydrological model; SWAT model; flood; drought; Yom and Nan river basins
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MDPI and ACS Style

Petpongpan, C.; Ekkawatpanit, C.; Visessri, S.; Kositgittiwong, D. Projection of Hydro-Climatic Extreme Events under Climate Change in Yom and Nan River Basins, Thailand. Water 2021, 13, 665. https://doi.org/10.3390/w13050665

AMA Style

Petpongpan C, Ekkawatpanit C, Visessri S, Kositgittiwong D. Projection of Hydro-Climatic Extreme Events under Climate Change in Yom and Nan River Basins, Thailand. Water. 2021; 13(5):665. https://doi.org/10.3390/w13050665

Chicago/Turabian Style

Petpongpan, Chanchai, Chaiwat Ekkawatpanit, Supattra Visessri, and Duangrudee Kositgittiwong. 2021. "Projection of Hydro-Climatic Extreme Events under Climate Change in Yom and Nan River Basins, Thailand" Water 13, no. 5: 665. https://doi.org/10.3390/w13050665

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