[1]YAN Weiqing,LIU Ji,ZHAO Xinrui,et al.Attribution of Runoff Variation in Jinxi Basin Based on Budyko Hypothesis[J].Research of Soil and Water Conservation,2023,30(03):121-126.[doi:10.13869/j.cnki.rswc.2023.03.055]
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
30
Number of periods:
2023 03
Page number:
121-126
Column:
Public date:
2023-04-10
- Title:
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Attribution of Runoff Variation in Jinxi Basin Based on Budyko Hypothesis
- Author(s):
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YAN Weiqing1,2,3, LIU Ji1,2,3, ZHAO Xinrui1,2,3, YANG Shaokang1,2,3, SHU Zhangkang4,5, DONG Xiaohua1,2,3, LIU Yanli4,5
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(1.Engineering Research Center of Eco-environment in Three Gorges Reservoir Region,Ministry of Education,Yichang,Hubei 443002,China; 2.Hubei Collaborative Innovation Center for Water Resources Security,Wuhan 430072,China; 3.College of Hydraulic and Environmental Engineering,China Three Gorges University,Yichang,Hubei 443002,China; 4.Research Center for Climate Change,Ministry of Water Resources,Nanjing 210029,China; 5.State Key Laboratory of Hydrology,Water Resources and Hydraulic......)
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- Keywords:
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runoff change; attribution analysis; Budyko equations; Jinxi Basin; NDVI
- CLC:
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P339
- DOI:
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10.13869/j.cnki.rswc.2023.03.055
- Abstract:
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[Objective]To explore the characteristics and causes of runoff change in Jinxi Basin plays an important guiding role in reservoir operation and water resources management. [Methods]Based on the meteorological and hydrological data and Normalized Difference Vegetation Index(NDVI)data from 1982 to 2015, linear regression method, Mann-Kendall mutation test and sliding T mutation test were used to analyze the characteristics of runoff change. The contribution rate of each influencing factor to runoff change was calculated by using Budyko coupled equilibrium equation. [Results]The results show that the annual runoff depth and rainfall in Jinxi Basin had no significant upward trend, with the changing rates of 3.89 mm/a and 8.43 mm/a, respectively; the potential evapotranspiration showed a significant upward trend at a rate of 1.17 mm/a; through mutation test, the runoff series of Jinxi Basin could be divided into the base period from 1982 to 2002 and the change period from 2003 to 2015; attribution analysis of runoff change in Jinxi Basin showed that the contribution rate of underlying surface change to runoff change was 123.55%, the contribution rate of potential evapotranspiration was 33.83%, and the contribution rate of rainfall was -57.38%. [Conclusion]The change of underlying surface of the basin is mainly due to the significant improvement of vegetation situation in which the increase rate of NDVI is 0.005/10 a in the base period and 0.024/10 a in the change period.