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Attribution analysis based on Budyko hypothesis for land evapotranspiration change in the Loess Plateau, China

  • Guohua He
  • Yong ZhaoEmail author
  • Jianhua Wang
  • Xuerui Gao
  • Fan He
  • Haihong Li
  • Jiaqi Zhai
  • Qingming Wang
  • Yongnan Zhu
Article
  • 7 Downloads

Abstract

Land evapotranspiration (ET) is an important process connecting soil, vegetation and the atmosphere, especially in regions that experience shortage in precipitation. Since 1999, the implementation of a large-scale vegetation restoration project has significantly improved the ecological environment of the Loess Plateau in China. However, the quantitative assessment of the contribution of vegetation restoration projects to long-term ET is still in its infancy. In this study, we investigated changes in land ET and associated driving factors from 1982 to 2014 in the Loess Plateau using Budyko-based partial differential methods. Overall, annual ET slightly increased by 0.28 mm/a and there were no large fluctuations after project implementation. An attribution analysis showed that precipitation was the driving factor of interannual variability of land ET throughout the study period; the average impacts of precipitation, potential evapotranspiration and vegetation restoration on ET change were 61.5%, 11.5% and 26.9%, respectively. These results provide an improved understanding of the relationship between vegetation condition change and climate variation on terrestrial ET in the study area and can support future decision-making regarding water resource availability.

Keywords

climate change vegetation evapotranspiration control factor arid region 

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Notes

Acknowledgements

This work was supported by the National Key Research and Development Program of China (2016YFC0401300), the Basic Research Project of China Institute of Water Resources and Hydropower Research (WR0145B342019), and the National Science Fund for Distinguished Young Scholars (51625904).

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Copyright information

© Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Science Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Guohua He
    • 1
    • 2
  • Yong Zhao
    • 1
    • 2
    Email author
  • Jianhua Wang
    • 1
    • 2
  • Xuerui Gao
    • 3
  • Fan He
    • 1
    • 2
  • Haihong Li
    • 1
    • 2
  • Jiaqi Zhai
    • 1
    • 2
  • Qingming Wang
    • 1
    • 2
  • Yongnan Zhu
    • 1
    • 2
  1. 1.State Key Laboratory of Simulation and Regulation of Water Cycle in River BasinBeijingChina
  2. 2.China Institute of Water Resources and Hydropower ResearchBeijingChina
  3. 3.Institute of Soil and Water ConservationNorthwest A&F UniversityYanglingChina

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