Analysis of Spatiotemporal Distribution and Non-stationary of Extreme Precipitation Events during 1960-2018 in the Yellow River Basin

Xianglin Lv, Hongjing Yu, Hao Dong, Shibao Ji, Yaqin Qiu, Xvdong Duan, Hao Zheng

2021

Abstract

Climate change has changed the extreme precipitation pattern in the Yellow River Basin (YRB). In this article, total of six extreme indices of rainfall were employed to assess the spatial and temporal distribution characteristics of extreme precipitation in YRB, and the GAMLSS model is applied in two typical stations (Xinghai, Yuncheng) to investigate the non-conformity in terms of persistence-CDD, intensity-R95p, and frequency-R20, respectively. The results showed that: a) In YRB, CDD had a significant upward trend, while there was a clear downward trend in R20 and SDII (Simple daily intensity index), and the spatial distribution of temporal trends varies greatly among regions, with an increasing tendency in the northwest of YRB and decreasing tendency in the southeast of YRB, which was the opposite of the spatial distribution. Indicating that rainfall decreased in the downstream of relatively wet basins, while rainfall increased in the upstream of relatively dry basins. b) Both representative stations expressed non-stationarity, but with different characteristics. In the stationary model (Model 0), the WEI (Weibull) was selected at most indices, In the non-stationary model (Model 1), the GA (Gamma) was selected at most Climate indices. In Station Xinghai in upper of YRB, drought days decreased, the mean and variance of the R20 and R95p distribution functions were increasing which indicates that the inter-annual variation became larger and more prone to extreme flooding or extreme drought. Station Yuncheng in lower of YRB also has fewer drought days, however the mean and variance of the R20 and R95p are decreasing which indicates more stable precipitation and a lower chance of extreme events than before.

Paper Citation

in Harvard Style

Lv X., Yu H., Dong H., Ji S., Qiu Y., Duan X. and Zheng H. (2021). Analysis of Spatiotemporal Distribution and Non-stationary of Extreme Precipitation Events during 1960-2018 in the Yellow River Basin. In Proceedings of the 7th International Conference on Water Resource and Environment - Volume 1: WRE, ISBN 978-989-758-560-9, pages 494-503

in Bibtex Style

@conference{wre21,
author={Xianglin Lv and Hongjing Yu and Hao Dong and Shibao Ji and Yaqin Qiu and Xvdong Duan and Hao Zheng},
title={Analysis of Spatiotemporal Distribution and Non-stationary of Extreme Precipitation Events during 1960-2018 in the Yellow River Basin},
booktitle={Proceedings of the 7th International Conference on Water Resource and Environment - Volume 1: WRE,},
year={2021},
pages={494-503},
publisher={SciTePress},
organization={INSTICC},
doi={},
isbn={978-989-758-560-9},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 7th International Conference on Water Resource and Environment - Volume 1: WRE,
TI - Analysis of Spatiotemporal Distribution and Non-stationary of Extreme Precipitation Events during 1960-2018 in the Yellow River Basin
SN - 978-989-758-560-9
AU - Lv X.
AU - Yu H.
AU - Dong H.
AU - Ji S.
AU - Qiu Y.
AU - Duan X.
AU - Zheng H.
PY - 2021
SP - 494
EP - 503
DO -