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Responses of meteorological drought-hydrological drought propagation to watershed scales in the upper Huaihe River basin, China

Abstract

Spatial scale is a crucial factor in drought propagation and characterization. To investigate the response behavior of the meteorological drought-hydrological drought propagation to different watershed scales, three nested subbasins in the upper Huaihe River basin were selected as case study sites. The Standardized Precipitation Index and the Standardized Streamflow Index were adopted to characterize the meteorological drought and hydrological drought respectively. The relationship between meteorological drought and hydrological drought was then examined by wavelet coherency analysis and linear/nonlinear regression models. Results showed that (1) linear regression model captured drought propagation best in all subbasins, and the correlation strengthened as the watershed area increased with drought duration being highest correlated among the five drought characteristics; (2) with the watershed area growth, the coherence between hydrological and meteorological drought reduced, the lagging effect of hydrological drought attenuated, and the hydrological one tended to be more synchronized with meteorological one over the long period; and (3) the larger the watershed scale, the later (earlier) occurrence of the hydrological drought onset (termination), while the longer drought duration and larger magnitude for triggering hydrological drought.

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Funding

This study received financial support from the project (2017B10814) supported by the Fundamental Research Funds for the Central Universities, the project (51909058, 51879069) by the National Natural Science Foundation of China, and the project (BK20160868) by the Jiangsu Province Science Foundation, the project (KT201729) by Jiangxi Province Water Rresources Department, National Key Research and Development Programs of China (2016YFA0601501).

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Correspondence to Meixiu Yu or Qiongfang Li.

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The authors declare that they have no conflicts of interest.

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Responsible editor: Boqiang Qin

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Yu, M., Liu, X. & Li, Q. Responses of meteorological drought-hydrological drought propagation to watershed scales in the upper Huaihe River basin, China. Environ Sci Pollut Res 27, 17561–17570 (2020). https://doi.org/10.1007/s11356-019-06413-2

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  • DOI: https://doi.org/10.1007/s11356-019-06413-2

Keywords

  • Drought propagation
  • hydrological drought
  • meteorological drought
  • watershed scales
  • humid and semi-humid regions