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Open AccessArticle

Impact of Climate Change on Precipitation Extremes over Ho Chi Minh City, Vietnam

1
Faculty of Environment, University of Science, Vietnam National University Ho Chi Minh City, Ho Chi Minh City 700000, Vietnam
2
Institute for Computational Science and Technology, Ho Chi Minh City 700000, Vietnam
3
Department of Civil and Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744, Korea
*
Author to whom correspondence should be addressed.
Water 2021, 13(2), 120; https://doi.org/10.3390/w13020120
Received: 24 November 2020 / Revised: 2 January 2021 / Accepted: 4 January 2021 / Published: 7 January 2021
In the context of climate change, the impact of hydro-meteorological extremes, such as floods and droughts, has become one of the most severe issues for the governors of mega-cities. The main purpose of this study is to assess the spatiotemporal changes in extreme precipitation indices over Ho Chi Minh City, Vietnam, between the near (2021–2050) and intermediate (2051–2080) future periods with respect to the baseline period (1980–2009). The historical extreme indices were calculated through observed daily rainfall data at 11 selected meteorological stations across the study area. The future extreme indices were projected based on a stochastic weather generator, the Long Ashton Research Station Weather Generator (LARS-WG), which incorporates climate projections from the Coupled Model Intercomparison Project 5 (CMIP5) ensemble. Eight extreme precipitation indices, such as the consecutive dry days (CDDs), consecutive wet days (CWDs), number of very heavy precipitation days (R20mm), number of extremely heavy precipitation days (R25mm), maximum 1 d precipitation amount (RX1day), maximum 5 d precipitation amount (RX5day), very wet days (R95p), and simple daily intensity index (SDII) were selected to evaluate the multi-model ensemble mean changes of extreme indices in terms of intensity, duration, and frequency. The statistical significance, stability, and averaged magnitude of trends in these changes, thereby, were computed by the Mann-Kendall statistical techniques and Sen’s estimator, and applied to each extreme index. The results indicated a general increasing trend in most extreme indices for the future periods. In comparison with the near future period (2021–2050), the extreme intensity and frequency indices in the intermediate future period (2051–2080) present more statistically significant trends and higher growing rates. Furthermore, an increase in most extreme indices mainly occurs in some parts of the central and southern regions, while a decrease in those indices is often projected in the north of the study area. View Full-Text
Keywords: extreme precipitation; LARS-WG; CMIP5; spatiotemporal changes; climate change extreme precipitation; LARS-WG; CMIP5; spatiotemporal changes; climate change
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MDPI and ACS Style

Khoi, D.N.; Trong Quan, N.; Thi Thao Nhi, P.; Nguyen, V.T. Impact of Climate Change on Precipitation Extremes over Ho Chi Minh City, Vietnam. Water 2021, 13, 120. https://doi.org/10.3390/w13020120

AMA Style

Khoi DN, Trong Quan N, Thi Thao Nhi P, Nguyen VT. Impact of Climate Change on Precipitation Extremes over Ho Chi Minh City, Vietnam. Water. 2021; 13(2):120. https://doi.org/10.3390/w13020120

Chicago/Turabian Style

Khoi, Dao N.; Trong Quan, Nguyen; Thi Thao Nhi, Pham; Nguyen, Van T. 2021. "Impact of Climate Change on Precipitation Extremes over Ho Chi Minh City, Vietnam" Water 13, no. 2: 120. https://doi.org/10.3390/w13020120

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