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[1]Cao Zhenjiang,Ji Guangxing,Yang Ruiting,et al.Multi-temporal scale attribution analysis of actual evapotranspiration and runoff changes in the source area of the Yellow River[J].Research of Soil and Water Conservation,2025,32(01):209-217.[doi:10.13869/j.cnki.rswc.2025.01.038]

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Multi-temporal scale attribution analysis of actual evapotranspiration and runoff changes in the source area of the Yellow River

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 32 Number of periods: 2025 01 Page number: 209-217 Column: Public date: 2025-01-10

Title:: Multi-temporal scale attribution analysis of actual evapotranspiration and runoff changes in the source area of the Yellow River

Author(s):: Cao Zhenjiang^1,2, Ji Guangxing¹, Yang Ruiting¹, Wang Yuxin¹, Li Fan¹, Zhang Yali¹, Chen Weiqiang¹, Huang Junchang¹; (1.School of Resources and Environment,Henan Agricultural University,Zhengzhou 450046,China; 2.School of Public Administration,China University of Geosciences,Wuhan 430074,China)

Keywords:: Yellow River source area; actual evaporation; runoff; multiple time scales; trend analysis; ABCD hydrological model; monthly time scale Budyko model

CLC:: P339; S161.6

DOI:: 10.13869/j.cnki.rswc.2025.01.038

Abstract:: [Objective]The aims of this study are to comprehensively analyze the main influencing factors of hydrological elements(actual evaporation and runoff)change in the source area of the Yellow River, and to provide reference for the study of hydrological cycle mechanism and ecological environmental protection in this region. [Methods]Based on the hydrometeorological data of the Yellow River source area from 1967 to 2020, the characteristics of the changes in the actual evaporation and runoff of the Yellow River source area on the annual, seasonal, and monthly scales were analyzed by using the Mann-Kendall trend test method. And the ABCD hydrological model and the monthly scale Budyko model were used to quantitatively compute the contributions of human activities and climate change to the changes of actual evaporation and runoff in the source area of the Yellow River at multiple time scales. [Results](1)The actual evapotranspiration in the source area of the Yellow River during the period 1967—2020 showed a significant increasing trend at the annual, seasonal and monthly time scales; runoff showed a non-significant decreasing trend at the annual scale in dry season, August and September, and a non-significant increasing trend in rainy season and July.(2)The influence of climate change on actual evapotranspiration was greater at the annual scale, in dry season, August and September, with contributions of 59.61%, 108.43%, 50.71%, and 58.17%, respectively. Human activities had a greater impact on the change of actual evapotranspiration in the rainy season and July, with contributions of 62.38% and 53.34%, respectively.(3)The dominant factor affecting the change of runoff was climate change, both at an annual scale andseasonal scale, and in July, August, and September, with contributions of 55.58%, 56.23%, 59.92%, 68.70%, 51.51%, and 87.03%, respectively. [Conclusion]The actual evaporation and runoff at different time scales in the source region of the Yellow River are mostly affected by climate change, but the contribution rates of climate factors and human activities to them are relatively small. In the future, attention should be paid to the intensification of human activities.

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Last Update: 2025-01-10