EGU21-3828, updated on 04 Mar 2021
https://doi.org/10.5194/egusphere-egu21-3828
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Influence of pollutants on rheological characteristics of sediment flow

Yuanyuan Zhang1,3, Jianen Gao1,3,2, Zhe Gao2, Youcai Kang1,3, Zhaorun Wang3,2, Lu Wang3,2, Fanfan Zhou3,2, Sixuan Liu3,2, Xingyao Li2, and Mingjuan Ji2
Yuanyuan Zhang et al.
  • 1Institute of Soil and Water Conservation, Chinese Academy of Sciences, China (1287743062@qq.com)
  • 2Northwest Agriculture and Forestry University, Yangling, China
  • 3Ministry of Water Resources and Water Conservation Ecological Engineering Technology Research Center,Yangling,China

Abstract: In view of the weak research on the rheological characteristics involved in the variation of the fluid movement caused by the storm runoff carrying a large amount of pollutants and sediments, this study uses the NDJ-5S rotary viscometer and the self-made slim tube viscometer of Northwest Agriculture and Forestry University. On the basis of the research, the influence of pollutants on the rheological characteristics of high-concentration sandy water flow is studied. The results show that the NDJ-5S rotary viscometer can be used well under the sand content of less than 300kg/m3. The double vertical tube slim tube viscometer made by Northwest A&F University can better simulate the sand content of 0~800kg/m3; The structure of flocculation between particles in sandy water flow will affect the viscosity of muddy water, and the concentration of sediment and other pollutants will have a certain impact on flocculation. Under the same conditions, the concentration of pollutants increases (0~440kg/m3), the viscosity coefficient of fluid increases (90%~114%), and the variation of sand content from Newtonian body to Bingham body is about 300~400kg/m3, The influence of pollutants on the variation points of rheological properties is not significant.

Keywords: pollutants; sediment; variation; viscometer; Newtonian fluid; Bingham fluid

Funding: This study was funded by the National Natural Science Foundation of China (No. 41877078, 41371276), Key research and development project of Shaanxi Province (2020ZDLSF06-03-01), National Key Research and Development Program of China (No. 2017YFC0504703) and Knowledge Innovation Program of the Chinese Academy of Sciences (No. A315021615). 

How to cite: Zhang, Y., Gao, J., Gao, Z., Kang, Y., Wang, Z., Wang, L., Zhou, F., Liu, S., Li, X., and Ji, M.: Influence of pollutants on rheological characteristics of sediment flow, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-3828, https://doi.org/10.5194/egusphere-egu21-3828, 2021.

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