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Comprehensive evaluation of hydrological drought and its relationships with meteorological drought in the Yellow River basin, China

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journal contribution
posted on 10.07.2020, 11:20 by Fei Wang, Zongmin Wang, Haibo Yang, Danyang Di, Yong Zhao, Qiuhua LiangQiuhua Liang, Zafar Hussain
Under the background of global warming, the acceleration of water cycle process will aggravate the risk of hydrological drought in the river basin. The Yellow River basin (YRB) is the most severely affected area by drought in China's major river basins, so it is particularly important to comprehensively evaluate the hydrological drought and explore its relationships with meteorological drought in the YRB. In this study, the Standardized Streamflow Index (SSI) was adopted as a hydrological drought index, and the evolution characteristics of hydrological drought were comprehensively evaluated in the YRB from 1961 to 2015. The duration and severity of hydrological drought events were identified based on run theory, and the copula functions with the highest goodness of fit (GOF) were used to investigate the drought return period. Finally, the Standardized Precipitation Evapotranspiration index (SPEI) was adopted as a meteorological drought index, and the relationships between hydrological and meteorological drought were revealed by cross wavelet transform method. The results indicated that: (1) drought showed an increasing trend in the YRB from 1961 to 2015, while the worst drought occurred in 1997; (2) the trend characteristic of drought was different in each subzone; (3) the most severe drought lasted for 32 months, with drought severity of 43.29, and drought return period of 23.26 years; (4) Frank-copula was considered to be the best-fitted copula function in the YRB; and (5) the cross wavelet transform illustrated that there was a positive correlation between hydrological and meteorological drought, and the phase angle relationships indicated that meteorological drought occurred earlier than hydrological drought in the YRB.

Funding

National Key R&D Program of China (2018YFC1508506)

Key Scientific Research Projects of Henan Colleges and Universities (Grant No. 19A170014)

Henan Province Scientific and Technological Project (Grant No. 172102410075)

Open Research Fund of the State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin at the China Institute of Water Resources and Hydropower Research (IWHR-SKL-201701)

National Natural Science Foundation of China (51779093)

Science and technology project of Guizhou Province Water Resources Department (KT201705)

History

School

  • Architecture, Building and Civil Engineering

Published in

Journal of Hydrology

Volume

584

Publisher

Elsevier BV

Version

AM (Accepted Manuscript)

Rights holder

© Elsevier B.V.

Publisher statement

This paper was accepted for publication in the journal Journal of Hydrology and the definitive published version is available at https://doi.org/10.1016/j.jhydrol.2020.124751.

Acceptance date

21/02/2020

Publication date

2020-02-22

Copyright date

2020

ISSN

0022-1694

Language

en

Depositor

Prof Qiuhua Liang. Deposit date: 8 July 2020

Article number

124751