[1]ZHAO Jiangtao,ZHAO Guangju,MU Xingmin,et al.Runoff and Sediment Load Variation and Driving Factors in the Hantaichuan Basin[J].Research of Soil and Water Conservation,2023,30(05):169-174.[doi:10.13869/j.cnki.rswc.2023.05.030.]
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
30
Number of periods:
2023 05
Page number:
169-174
Column:
Public date:
2023-08-10
- Title:
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Runoff and Sediment Load Variation and Driving Factors in the Hantaichuan Basin
- Author(s):
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ZHAO Jiangtao1, ZHAO Guangju1,2, MU Xingmin1,2, CHEN Zhaoliang1, WANG Ruidong3, ZHANG Qiaolan3
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(1.Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China; 2.Institute of Soil and Water Conservation, Chinese Academy of Sciences & Ministry of Water Resources, Yangling, Shaanxi 712100, China; 3.Erdos Hydrological Survey Bureau of Inner Mongolia Autonomous Region, Erdos, Inner Mongolia 017200, China)
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- Keywords:
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Hantaichuan Basin; runoff; sediment load; water-sediment relationship; attribution analysis
- CLC:
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S157.1
- DOI:
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10.13869/j.cnki.rswc.2023.05.030.
- Abstract:
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[Objective] The aims are to study the characteristics of precipitation, runoff and sediment transport in typical tributaries of Kongdui, quantify the impact of climate change and human activities on water and sediment changes, so as to reveal the driving mechanism of water and sediment evolution in Kongdui area, and to explore the reasons for the reduction of sediment transferring to Yellow River through Kongdui. [Methods] Based on annual precipitation, runoff and sediment discharge data from 1980 to 2018 in the Hantaichuan Basin, a typical tributary of the 10 Kongdui in the Yellow River Basin, the causes of water and sediment changes were investigated by means of linear trend method, Mann-Kendall trend test, Pettitt catastrophe test and double accumulation curve. [Results] Precipitation and runoff in Hantaichuan watershed showed a non-significant upward trend, while sediment discharge showed a significant downward trend(p<0.05). The annual runoff and annual sediment discharge both changed abruptly in 1998. After the abrupt change, the annual average runoff decreased by 38.61% compared with that before the abrupt change, while the sediment discharge significantly decreased by 80.61% compared with that before the abrupt change. [Conclusion] Human activities are the main factors contributing to the decrease of runoff and sediment discharge in the Hantaichuan Basin, with the contribution rates of 60.38% and 59.73%, respectively, while the contribution rates of precipitation change are 39.62% and 40.27%, respectively.