Influence of pollutants on rheological characteristics of sediment flow
- 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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