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[1]TIAN Jinhua,LI Zhengqin,KE Haocheng,et al.Runoff Evolution and Driving Factors of Weihe River in Gansu in Recent 60 Years[J].Research of Soil and Water Conservation,2023,30(01):183-189.[doi:10.13869/j.cnki.rswc.2023.01.025]

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Runoff Evolution and Driving Factors of Weihe River in Gansu in Recent 60 Years

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 30 Number of periods: 2023 01 Page number: 183-189 Column: Public date: 2023-01-10

Title:: Runoff Evolution and Driving Factors of Weihe River in Gansu in Recent 60 Years

Author(s):: TIAN Jinhua¹, LI Zhengqin², KE Haocheng², LIANG Liang², TIAN Menghan², GAO Jinfang¹; (1.Lanzhou Soil and Water Conservation Scientific Experimental Station, Gansu Provincial Water Resources Department, Lanzhou 730020, China; 2.Lanzhou University of Technology, Lanzhou 730050, China)

Keywords:: runoff evolution; climate change; human activities; driving factors; Weihe River in Gansu section

CLC:: TV121⁺1

DOI:: 10.13869/j.cnki.rswc.2023.01.025

Abstract:: Analyzing the long-term variation trend of runoff and studying its influencing factors are the premise of efficient utilization of regional water resources. In order to reveal the impact of climate change and human activities on the runoff in the Weihe River in Gansu section, runoff, precipitation and temperature were analyzed by using Mann-Kendall Test and R/S method in this study. The periodic characteristics of runoff were studied by Wavelet analysis. The year of runoff variation was determined by Mann-Kendall Test and cumulative anomaly method, and the whole study period was divided into the base period and the anthropogenic period. The contribution of different driving factors to runoff change was calculated quantitatively by using the method of cumulative slope change rate. The results showed that:(1)from 1953 to 2010, the runoff and precipitation in the Weihe River in Gansu section showed a decreasing trend, and the air temperature showed a significant increasing trend;(2)the abrupt change of runoff occurred in 1991, and the runoff decreased by 802 million cubic meters in the anthropogenic period compared with the base period; the contribution rate of climate change to the decrease of runoff was 37.57%, and the anthropogenic effect accounted for 62.43%. To sum up, the impact of human activities on runoff is dominant. This study clarifies the hydrometeorological trend of the Weihe River in Gansu section in the future, and makes a quantitative analysis of the driving factors of runoff change, which can provide a theoretical basis for the efficient utilization of regional water resources.

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Last Update: 2023-01-10