[1]WANG Long,SONG Xiaoyu,LI Lanjun,et al.Variation Trend and Attribution Analysis of Runoff in Typical Small Watershed in Gully Region of the Loess Plateau[J].Research of Soil and Water Conservation,2021,28(04):48-53.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 04
Page number:
48-53
Column:
Public date:
2021-08-10
- Title:
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Variation Trend and Attribution Analysis of Runoff in Typical Small Watershed in Gully Region of the Loess Plateau
- Author(s):
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WANG Long1, SONG Xiaoyu1, LI Lanjun1, ZHANG Ling1, LIU Yu1, LI Huaiyou2, LI Yaolin2
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(1.State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, China; 2.Xifeng Experiment Station of Soil and Water Conservation, Yellow River Conservancy Committee, Xifeng, Gansu 745000, China)
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- Keywords:
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runoff change; double cumulative curve method; elastic coefficient method; Mann-Kendall trend test; Nanxiaohegou watershed
- CLC:
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P333.3
- DOI:
-
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- Abstract:
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In order to explore the driving factors of runoff change in small watershed of the Loess Plateau, improve watershed management, and realize ecological protection and high-quality development of the Yellow River Basin, Nanxiaohegou watershed, a typical small watershed for soil and water conservation on the Loess Plateau was taken as the research object. Based on the measured hydrological and land use data from 1958 to 2017, the trend analysis and abrupt change point test of precipitation and runoff data were conducted by using Mann-Kendall trend test method. Then, the attribution analysis and quantitative analysis of runoff change were conducted to explore the contribution rates of climate change and human activities to runoff change by adopting the double cumulative curve method and the elastic coefficient method. The calculation results of different methods were compared. The results show that:(1)the abrupt change point of runoff occurred in 1985; in the base period, both the precipitation and runoff showed a fluctuating trend, while the precipitation did not show a significant decrease trend in the change period; however, the runoff showed a significant decrease trend;(2)the contribution rates of climate change and human activities to runoff reduction were 7% and 93%, respectively, by the double cumulative curve method, and 42.6% and 57.4%, respectively, by the elastic coefficient method. Above all, Human activities were the main influencing factors of runoff change. Compared with the double cumulative curve method, the elastic coefficient method is more recommended for attribution analysis of runoff variation in small watershed of Loess Plateau.