Spatiotemporal Response of Hydrological Drought to Meteorological Drought on Multi-Time Scales Concerning Endorheic Basin

International Journal of Environmental Research and Public Health

卷:18

Jianhua Xu¹  Nina Zhu²  Xianzhong Cao²  Gang Zeng² 

[1] Key Laboratory of Geographic Information Science (Ministry of Education), East China Normal University, Shanghai 200241, China;

[2] The Center for Modern Chinese City Studies, Institute of Urban Development, East China Normal University, Shanghai 200062, China;

关键词: standardized precipitation index;    standardized terrestrial water storage index;    spatiotemporal changes;    multi-time scale response;    endorheic basin;   

DOI  :  10.3390/ijerph18179074

来源: DOAJ

【 摘 要 】

Under the controversial background of “Northwestern China is gradually developing towards warm and humid”, how hydrological drought responds to meteorological drought at the endorheic basin is of great significance. To address this problem, we first analyzed the spatiotemporal variation of meteorological and hydrological droughts at Tarim Basin River from 1960 to 2014 by using the daily standardized precipitation index (SPI) and daily standardized terrestrial water storage index (SWSI) based on the reanalysis data. Thereafter, we explored the spatiotemporal response of hydrological drought to meteorological drought on the multi-time scale by using the cross-wavelet transform method, Ensemble Empirical Mode Decomposition (EEMD), and correlation analysis. We find that: (1) both meteorological and hydrological droughts signified a gradually weakened trend in time; (2) meteorological and hydrological drought have significant resonance periods on the 10-month time scale and the 8-year time scale; (3) hydrological drought generally lags behind the meteorological drought by 7 days in plains areas, while it can last as long as several months or even a year in mountainous areas.

【 授权许可】

Unknown