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Journal of Desert Research ›› 2024, Vol. 44 ›› Issue (6): 110-121.DOI: 10.7522/j.issn.1000-694X.2024.00064

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Attribution analysis of runoff variations in the Changma River Basin based on the Budyko hypothesis

Zhenliang Yin1,2(), Rui Zhu3, Chunshuang Fang3(), Huaqing Yang3, Zexia Chen1   

  1. 1.Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands / National Cryosphere Desert Data Center,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
    2.College of Safety and Environmental Engineering,Shandong University of Science and Technology,Qingdao 266000,Shandong,China
    3.Faculty of Geomatics / National-Local Joint Engineering Research Center of Technologies and Applications for National Geographic State Monitoring / Gansu Provincial Engineering Laboratory for National Geographic State Monitoring,Lanzhou Jiaotong University,Lanzhou 730000,China
  • Received:2024-04-29 Revised:2024-05-22 Online:2024-11-20 Published:2024-12-06
  • Contact: Chunshuang Fang

Abstract:

The high-quality economic development and the security of the oasis ecosystem in the middle and lower reaches of the Shule River Basin are intimately connected to the runoff emerging from the upper reaches. The Changma River, as the principal channel of the Shule River, exhibits extreme sensitivity to variations in climate and underlying surface changes. This study, focusing on the Changma River Basin and employing the Budyko hypothesis for the attribution analysis of runoff variations, arrives at the following primary conclusions: (1) Runoff, climate, and underlying surface factors all display pronounced characteristics of abrupt change, with the overall climate trend leaning towards warmer and more humid conditions. (2) Runoff exhibits the highest sensitivity to changes in precipitation, followed by underlying surface changes and potential evapotranspiration. In 1965-2015, the runoff in the Changma River demonstrated a significant increasing trend, with climate change (precipitation and potential evapotranspiration) and changes in the underlying surface contributing 37.31% and 62.79% to the runoff quantity changes, respectively. Changes in the underlying surface emerge as the predominant cause of runoff variations, with an increase in precipitation playing a secondary role. (3) The leaf area index is the factor most correlated with changes in runoff, followed by precipitation and soil water content. The change of underlying surface factors can explain the changes in runoff to a greater extent.

Key words: Changma River Basin, runoff change, climate change, Budyko hypothesis

CLC Number: