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Journal of Desert Research ›› 2023, Vol. 43 ›› Issue (3): 210-219.DOI: 10.7522/j.issn.1000-694X.2022.00127

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Study on the attribution of runoff variation in the Danghe River based on the Budyko hypothesis

Pengfei Liang1(), Huijuan Xin1(), Zongxing Li1,2(), Fusen Nan3, Biao Tang1, Wenbao Zhang1   

  1. 1.School of Environment and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China
    2.Observation and Research Station of Eco-Hydrology and National Park by Stable Isotope Tracing in Alpine Region / Gansu Qilian Mountains Ecology Research Center / Key Laboratory of Ecohydrology of Inland River Basin,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
    3.College of Geography and Environmental Sciences,Northwest Normal University,Lanzhou 730070,China
  • Received:2022-08-10 Revised:2022-09-30 Online:2023-05-20 Published:2023-05-31
  • Contact: Huijuan Xin,Zongxing Li

Abstract:

The characteristics of watershed water resources changes and their attribution identification have been important scientific problems in hydrological research. we analyzed the characteristics of meteorological, subsurface and hydrological elements changes using methods such as linear propensity estimation, and quantified the contributions of climate change and human activities to runoff changes based on based on Budyko hypothesis in Danghe River basin. The results show that the temperature and precipitation showed an increasing trend, and the climate developed toward the direction of warming and humidification. The area of forestland, grassland, arable land, water area and construction land increased while the area of unused land decreased; the glacier retreat rate was -3.86 km2·yr-1; the average decrease rate of the annual average maximum freezing depth was -1.14 cm·yr-1. The interannual increasing rate of runoff was 0.21×108 m3/10yr, and the intra-annual distribution of runoff depicted a double-peak effect, the contributions of precipitation and temperature to the annual variation of runoff were 57.2% and 42.8%, respectively, and the contributions of climate change and human activities to the annual variation of runoff were 59.46% and 40.54%, respectively. The results of the study can provide a reference for the scientific management and optimal allocation of water resources in Danghe River basin.

Key words: Danghe River, climate change, runoff, attribution analysis, Budyko hypothesis

CLC Number: