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Analysis of characteristics of sediment transport in sewers by densimetric Froude number

밀도프루드수에 의한 하수관로 침전물 이송 특성 분석

  • Park, Kyoohong (Department of Civil Engineering, Chung-Ang University) ;
  • Lee, Taehoon (Department of Civil Engineering, Chung-Ang University) ;
  • Yu, Soonyu (Department of Consilience, ADD at Korea Polytechnic University) ;
  • Kang, Byongjun (Department of Civil Engineering, Chung-Ang University) ;
  • Hyun, Kirim (Department of Civil Engineering, Chung-Ang University)
  • 박규홍 (중앙대학교 사회기반시스템공학부) ;
  • 이태훈 (중앙대학교 사회기반시스템공학부) ;
  • 유순유 (한국산업기술대학교 지식융합학부) ;
  • 강병준 (중앙대학교 사회기반시스템공학부) ;
  • 현기림 (중앙대학교 사회기반시스템공학부)
  • Received : 2019.05.16
  • Accepted : 2020.01.30
  • Published : 2020.02.15

Abstract

Even though sewers have been conventionally designed to prevent from sediment deposition using a specified minimum velocity or shear stress at a particular depth of flow or with a particular frequency of occurrence, it was appreciated that these methods do not consider the characteristics and concentration of the sediment and the specific hydraulic conditions of the sewer with sediment. In this study, a densimetric Froude number formula was suggested considering particle diameter and volumetric concentration of the sediment as well as flow depth and flowrate, based on several domestic field inspections, which was compared with other formulas proposed by previous investigators. When the sediment concentration was not considered, the calibration coefficient of 0.125-1.5 to the densimetric Froude numbers of this study was needed to obtain the similar ones with previous investigators'. For the densimetric Froude number formula obtained with consideration of sediment concentration, the exponent value of term Cv was almost the same as that of previous results and that of d50/Rh was similar for Fr < 2.2.

Keywords

References

  1. Ackers, P. and White, W.R. (1973). Sediment transport: new approach and analysis, J. Hydra. Div., 99(hy11).
  2. Ackers, J.C., Butler D., John, S., and May, R.W.P. (1996). "Self-cleansing sewer design: the CIRIA Procedure", Proceedings of 7th International Conference on Urban Storm Drainage, Hannover, September, 875-880.
  3. ASCE and WPCF. (1970). Design and construction of sanitary and storm sewers, Am. Soc. Civ. Eng. Water Pollut. Control. Fed., 37.
  4. Azamathulla, H.M., Ghani, A.A., and Fei, S.Y. (2012). ANFIS-based approach for predicting sediment transport in clean sewer, App. Soft Comput., 12(3), 1227-1230. https://doi.org/10.1016/j.asoc.2011.12.003
  5. Banasiak, R. (2008). Hydraulic performance of sewer pipes with deposited sediments, Water Sci. Technol., 57(11), 1743-1748. https://doi.org/10.2166/wst.2008.287
  6. Bonakdari, H., and Ebtehaj, I. (2014). "Verification of equation for nondeposition sediment transport in flood water canals", 7th Int. Conf. on Fluvial Hydraulics, RIVER FLOW 2014, Taylor & Francis Group, London, 1527-1533.
  7. Boankdari, H. and Larrate, F. (2006). "Experimental and numerical inverstigation on self-cleasing and shear in sewers", 2nd Int. IWA Conf., Sewer Operation and Maintenance, SOM 06, SIG Eigen, Wien, 19-26.
  8. British Standard Institution. (1987). Sewerage guide to new sewerage construction, BS 8005-1, London.
  9. Butler, D., May, R.W.P., and Ackers, J.C. (1996a). "Sediment transport in sewers - Part 1: Background", Proceedings of Institution of Civil Engineers, Water, Maritime and Energy, 118, June, 103-112.
  10. Butler, D., May, R.W.P., and Ackers, J.C. (1996b). "Sediment transport in sewers - Part 2: Design", Proceedings of Institution of Civil Engineers, Water, Maritime and Energy, 118, June, 113-120. https://doi.org/10.1680/iwtme.1996.28432
  11. Butler, D., May, R.W.P. and Ackers, J.C. (2003). Self-cleansing sewer design based on sediment transport principles, J. Hydrau. Eng., 129(4), 276-282. https://doi.org/10.1061/(ASCE)0733-9429(2003)129:4(276)
  12. Camp, T.R. (1942). Minimum velocities for sewers final report committee to study limiting velocities of flow in sewers, J. Boston Soc. Civ. Eng., 29, 286.
  13. CEN(European Committee for Standardization). (1997). "Drain and sewer system outside builidng", Part 4: Hydraulic design and environmental considerations, EN 752-4, Brussels, Belgium.
  14. CIRIA. (1986). Sediment movement in combined sewerage and storm-water drainage systems, Phase 1. Project Report.
  15. Craven, J.P. (1953). The transportation of sand in pipes; free-surface flow. Hydraulics conference proceedings, Iowa, State University of Iowa Studies in Engineering, bulletin 34, 67-76.
  16. Durand, R. (1953). "Basic relationships of the transportation of solids in pipes experimental research", In Proc. 5th Congress, IAHR, 89-103.
  17. Ebtehaj, I. and Bonakdari, H. (2013). Evaluation of sediment transport in sewer using artificial neural network, Eng. App. Comput. Fluid Mech., 7(3), 382-392.
  18. Ebtehaj, I. and Bonakdari, H. (2014a). Comparison of genetic algorithm and imperialist competitive algorithms in predicting bed load transport in clean pipe, Watet Sci. Technol., 70(10), 1695-1701. https://doi.org/10.2166/wst.2014.434
  19. Ebtehaj, I. and Bonakdari, H. (2014b). Performance evaluation of adaptive neural fuzzy inference system for sediment transport in sewers, Water Res. Manage., 28(13), 4765-4779. https://doi.org/10.1007/s11269-014-0774-0
  20. Ebtehaj, I., Bonakdari, H., and Sharifi, A. (2014). Design criteria for sediment transport in sewers based on self-cleansing concept, J. Zhejiang Univ. Sci. A, 15(11), 914-924. https://doi.org/10.1631/jzus.A1300135
  21. Ebtehaj, I., Bonakdari, H., Shamshirband, S., Ismail, Z., and Hashim, R. (2016). New approach to estimate velocity at limit of deposition in storm sewers using vector machine coupled with firefly algorithm, J. Pipe. Sys. Eng. Prac., 8(2), 04016018-1-04016018-12. https://doi.org/10.1061/(ASCE)PS.1949-1204.0000252
  22. Ghani, A.A. (1993). Sediment transport in sewers, Ph.D. thesis, Univ. of Newcastle Upon Tyne, Newcastle, U.K.
  23. Lindholm, O.G. (1984). "Pollutant loads from combined sewer systems", Proceedings of the 3rd international conference on urban storm drainage, Gothenburg, Sweden, June, 4(1602).
  24. Lysne, D.K. (1969). Hydraulic design of self-cleaning sewage tunnels, J. San. Eng. Div., 95 (SA1), 17-36. https://doi.org/10.1061/JSEDAI.0000937
  25. Macke, E. (1982). "About sedimentation at low concentrations in partly filled pipes", Mitteilungen, LeichtweissD Institut fuE r Wasserbau der Technischen, UniversitaEt Braunschweig., Braunschweig, Deutsche.