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Hydrology 2018, 5(3), 33;

Projected Changes of Precipitation IDF Curves for Short Duration under Climate Change in Central Vietnam

Department of Hydro-Meteorological Modeling and Forecasting, Thuyloi University, 175 Tay Son, Dong Da, Hanoi, Vietnam
Head of Applied Research Division, HYDRODATA S.p.A. via Pomba, 23-10123 Torino, Italy
Author to whom correspondence should be addressed.
Received: 27 May 2018 / Revised: 10 July 2018 / Accepted: 12 July 2018 / Published: 13 July 2018
(This article belongs to the Special Issue Climatic Change Impact on Hydrology)
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In future years, extreme weather events are expected to frequently increase due to climate change, especially in the combination of climate change and events of El Niño–Southern Oscillation. This pays special attention to the construction of intensity–duration–frequency (IDF) curves at a tempo-spatial scale of sub-daily and sub-grid under a context of climate change. The reason for this is that IDF curves represent essential means to study effects on the performance of drainage systems, damps, dikes and reservoirs. Therefore, the objective of this study is to present an approach to construct future IDF curves with high temporo-spatial resolutions under climate change in central Vietnam, using the case of VuGia-ThuBon. The climate data of historical and future from a regional climate model RegCM4 forced by three global models MPI-ESM-MR, IPSL-CM5A-LR and ICHEC-EC-EARTH are used to re-grid the resolution of 10 km × 10 km grid spacing from 25 km × 25 km on the base of bilinear interpolation. A bias correction method is then applied to the finest resolution of a hydrostatic climate model for an ensemble of simulations. Furthermore, the IDF curves for short durations of precipitation are constructed for the historical climate and future climates under two representative concentration pathway (RCP) scenarios, RCP4.5 and RCP8.5, based on terms of correlation factors. The major findings show that the projected precipitation changes are expected to significantly increase by about 10 to 30% under the scenarios of RCP4.5 and RCP8.5. The projected changes of a maximum of 1-, 2-, and 3-days precipitation are expected to increase by about 30–300 mm/day. More importantly, for all return periods (i.e., 10, 20, 50, 100, and 200 years), IDF curves completely constructed for short durations of precipitation at sub-daily show an increase in intensities for the RCP4.5 and RCP8.5 scenarios. View Full-Text
Keywords: IDF curves; precipitation; downscaling; bias correction; climate change; VuGia-ThuBon IDF curves; precipitation; downscaling; bias correction; climate change; VuGia-ThuBon

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Tien Thanh, N.; Dutto Aldo Remo, L. Projected Changes of Precipitation IDF Curves for Short Duration under Climate Change in Central Vietnam. Hydrology 2018, 5, 33.

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