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Proceedings of the International Association of Hydrological Sciences An open-access publication for refereed proceedings in hydrology

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Proc. IAHS, 379, 357-362, 2018
https://doi.org/10.5194/piahs-379-357-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Pre-conference publication
05 Jun 2018
Multiple time scale analysis of sediment and runoff changes in the Lower Yellow River
Kaige Chi1, Zhao Gang2, Bo Pang1, and Ziqian Huang1 1Beijing Normal University, Beijing, 100875, China
2School of Geographical Sciences, University of Bristol, Bristol BS8 1SS, UK
Abstract. Sediment and runoff changes of seven hydrological stations along the Lower Yellow River (LYR) (Huayuankou Station, Jiahetan Station, Gaocun Station, Sunkou Station, Ai Shan Station, Qikou Station and Lijin Station) from 1980 to 2003 were alanyzed at multiple time scale. The maximum value of monthly, daily and hourly sediment load and runoff conservations were also analyzed with the annually mean value. Mann–Kendall non-parametric mathematics correlation test and Hurst coefficient method were adopted in the study. Research results indicate that (1) the runoff of seven hydrological stations was significantly reduced in the study period at different time scales. However, the trends of sediment load in these stations were not obvious. The sediment load of Huayuankou, Jiahetan and Aishan stations even slightly increased with the runoff decrease. (2) The trends of the sediment load with different time scale showed differences at Luokou and Lijin stations. Although the annually and monthly sediment load were broadly flat, the maximum hourly sediment load showed decrease trend. (3) According to the Hurst coefficients, the trend of sediment and runoff will be continue without taking measures, which proved the necessary of runoff-sediment regulation scheme.
Citation: Chi, K., Gang, Z., Pang, B., and Huang, Z.: Multiple time scale analysis of sediment and runoff changes in the Lower Yellow River, Proc. IAHS, 379, 357-362, https://doi.org/10.5194/piahs-379-357-2018, 2018.
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Short summary
Sediment and runoff changes of seven hydrological stations along the Lower Yellow River from 1980 to 2003 were alanyzed at multiple time scale. Research results indicate that (1) The runoff and sediment of the Lower Yellow River during 20 years show the different trend.The runoff reduced,but sediment were not same.(2)The time scale has big effect on the analysis results. (3) The changes of runoff and sediment show high persistence without additional measures, which proved the necessary of WSRS.
Sediment and runoff changes of seven hydrological stations along the Lower Yellow River from...
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