Spatiotemporal Changes and Frequency Analysis of Multiday Extreme Precipitation in the Huai River Basin during 1960 to 2014

Abstract

Floods and droughts are more closely related to the extreme precipitation over longer periods of time. The spatial and temporal changes and frequency analysis of 5-day and 10-day extreme precipitations (PX5D and PX10D) in the Huai River basin (HRB) are investigated by means of correlation analysis, trend and abrupt change analysis, EOF analysis, and hydrological frequency analysis based on the daily precipitation data from 1960 to 2014. The results indicate (1) PX5D and PX10D indices have a weak upward trend in HRB, and the weak upward trend may be due to the significant downward trend in the 21st century, (2) the multiday (5-day and 10-day) extreme precipitation is closely associated with flood/drought disasters in the HRB, and (3) for stations of nonstationary changes with significant upward trend after the abrupt change, if the whole extreme precipitation series are used for frequency analysis, the risk of future floods will be underestimated, and this effect is more pronounced for longer return periods.

Event‐based extreme precipitation variability analysis over a part of the Hindu Kush Himalayan region

“…For example, the Uttarakhand flood of 2013 occurred due to continuous precipitation during 14–18 June 2013; the Kerala flood of 2018 was due to severe storm occurrence between 15 August 2018 and 17 August 2018 (NITI Aayog, 2021). It depicts the importance of examining multiday extreme precipitation, and it has become more of a researchers' interest in recent literature (Duan et al, 2017a; Huang et al, 2022; Yin et al, 2019). Nanditha and Mishra (2022) examined soil moisture conditions and precipitation characteristics and found that multiday precipitation is more predominant in causing floods than extreme soil moisture conditions, especially for large river basins.…”

“…Huang et al (2022) studied changes in the frequency of consecutive extreme precipitation (CEP) between dry and wet regions of China and found that CEP tended to be more frequent in dry regions during the last 60 years. In another case study, Yin et al (2019) found that changes in the frequency of multiday extreme precipitation are closely associated with flood/drought disasters. Similarly, numerous studies (Guo et al, 2018; Najafi & Moradkhani, 2015; Ramos et al, 2017) have various aspects of multiday events across the globe which shows a need for studying multiday extreme precipitation events.…”

Segmental Variability of Precipitation In The Mahanadi River Basin During 1901-2017

“…PCP reveals early rainfall in the eastern UHRB and PCD indicates more dispersed rainfall in the western UHRB. Yin et al [25] have studied the Huai River basin for frequency analysis of extreme 5-day and 10-day precipitation and spatio-temporal changes using EOF and hydrological frequency analysis by analyzing daily precipitation data and found a weak upward trend for the two extreme events and are closely associated with drought/ ooding. Yuan et al [26] investigated the spatial and temporal variation of seasonal and annual precipitation in the Poyang Lake basin using statistical techniques and continuous wavelet transform by analyzing monthly precipitation data .…”