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Prediction of Cohesive Sediment Transport and Flow Resistance Around Artificial Structures of the Beolgyo Stream Estuary

  • Cho, Young-Jun (School of Marine Technology, Chonnam National University) ;
  • Hwang, Sung-Su (Institute of Geometics, Saehan Aero Survey Co. Ltd.) ;
  • Park, Il-Heum (School of Marine Technology, Chonnam National University) ;
  • Choi, Yo-Han (School of Marine Technology, Chonnam National University) ;
  • Lee, Sang-Ho (School of Construction Engineering, Pukyong National University) ;
  • Lee, Yeon-Gyu (School of Marine Technology, Chonnam National University) ;
  • Kim, Jong-Gyu (School of Marine Technology, Chonnam National University) ;
  • Shin, Hyun-Chool (School of Marine Technology, Chonnam National University)
  • Received : 2010.04.21
  • Accepted : 2010.06.10
  • Published : 2010.06.30

Abstract

To predict changes in the marine environment of the Beolgyo Stream Estuary in Jeonnam Province, South Korea, where cohesive tidal flats cover a broad area and a large bridge is under construction, this study conducted numerical simulations involving tidal flow and cohesive sediment transport. A wetting and drying (WAD) technique for tidal flats from the Princeton Ocean Model (POM) was applied to a large-scale-grid hydrodynamic module capable of evaluating the flow resistance of structures. Derivation of the eddy viscosity coefficient for wakes created by structures was accomplished through the explicit use of shear velocity and Chezy's average velocity. Furthermore, various field observations, including of tide, tidal flow, suspended sediment concentrations, bottom sediments, and water depth, were performed to verify the model and obtain input data for it. In particular, geologic parameters related to the evaluation of settling velocity and critical shear stresses for erosion and deposition were observed, and numerical tests for the representation of suspended sediment concentrations were performed to determine proper values for the empirical coefficients in the sediment transport module. According to the simulation results, the velocity variation was particularly prominent around the piers in the tidal channel. Erosion occurred mainly along the tidal channels near the piers, where bridge structures reduced the flow cross section, creating strong flow. In contrast, in the rear area of the structure, where the flow was relatively weak due to the formation of eddies, deposition and moderated erosion were predicted. In estuaries and coastal waters, changes in the flow environment caused by artificial structures can produce changes in the sedimentary environment, which in turn can affect the local marine ecosystem. The numerical model proposed in this study will enable systematic prediction of changes to flow and sedimentary environments caused by the construction of artificial structures.

Keywords

References

  1. Akins RE, Peterka JA and Cermak JE. 1977. Mean force and momentum coefficients for buildings in turbulent boundary layers. J Indust Aeronaut 2, 195-209. https://doi.org/10.1016/0167-6105(77)90022-8
  2. Blevins RD. 1984. Applied fluid dynamics handbook. In Chapter 10, Van Nostrand Reinhold Company, 279-311.
  3. Choi JM. 2004. Sediment behavior mechanism in Yeoja Bay, south coast of Korea. Doctoral Thesis, Oceanography Program, Department of Fisheries Science, Yeosu National University.
  4. Elder JW. 1959. The dispersion of market fluid in turbulence shear flow. J Fluid Mechanic 5, 544-560. https://doi.org/10.1017/S0022112059000374
  5. Falconer RA. 1976. Mathematical modelling of jet-forced circulation in reservoirs and harbours. Thesis submitted to University of London in partial fulfillment of degree of Ph.D., November.
  6. Falconer RA. 1986. A two-dimensional mathematical model study of the nitrate levels in an inland natural basin. Proceedings of the International Conference on Water Quality Modelling in the Inland Natural Environment, BHRA Fluid Engineering, Bournemouth, England, Paper J1, June, 325-344.
  7. Falconer RA. 1991. Review of modelling flow and pollutant transport processes in hydraulic basins. In Proceeding 1st International Conference on Water Pollution: Modelling, Measuring and Prediction, Southampton, Computational Mechanics Publications, September, 3-23.
  8. Falconer RA and Owens PH. 1987. Numerical simulation of flooding and drying in a depth-averaged tidal flow model. In Proceeding Institution of Civil Engineering, 83, Part 2, March, 161-180. https://doi.org/10.1680/iicep.1987.346
  9. Fischer HB. 1973. Longitudinal dispersion and turbulent mixing in open channel flow. Annual Review of Fluid Mechanics, 5, 59-78. https://doi.org/10.1146/annurev.fl.05.010173.000423
  10. Gailani J, Ziegler CK, and Lick W. 1991. Transport of suspended solids in the Lower Fox Fiver. J Great Lakes Research 17, 479-494. https://doi.org/10.1016/S0380-1330(91)71384-1
  11. Gortler H. 1942. Berechnung von aufgaben der freien turbulenz auf grundeines neuen naherungsa-ansatzes. ZAMM 22, 244-245. https://doi.org/10.1002/zamm.19420220503
  12. Huber WC and Dickinson RE. 1988. Storm water management model, version 4: User's manual version 2.1, U.S. Army Corps of Engineers, Computer Program 723-S8-L7520.
  13. Jung TS, Kim TS and Jeong DK. 2006. Numerical modeling of cohesive sediment transpot at Mokpo coastal zone. J Korean Soc Marine Environ Eng 9, 36-44.
  14. Krone RB. 1963. A study of rheologic properties of estuarial sediments. SERL Report No. 63-8, Hy-draulic Engineering Laboratory and Sanitary Enginee-ring Research Laboratory, University of California, Berkeley.
  15. Lee JS and Park IH. 1995. Evaluation and numerical model of hydraulic resistance by hanging aquaculture facilities. J Korean Fish Soc 28, 607-623.
  16. Mehta AJ and Partheniades E. 1973. Effect of physico-chemical properties of fine suspended sediment on the fegree of deposition. In Proceeding of International Symposium on River Mechanics, IAHE, 1, Bangkok, Tailand, January.
  17. Mehta AJ and Parchure TM. 1982. Resuspension potential of deposited cohesive sediment beds, in estuarine comparison, V.S. Kennedy(ed), Academy Press, New York.
  18. Mehta AJ, Mcanally WH, Hayter EJ, Teeter AM, Schoellhamer D, Helzel SB, and Carey WP. 1989. Cohesive sediment transport II: application. J Hydraulic Eng 115, 1094-1112. https://doi.org/10.1061/(ASCE)0733-9429(1989)115:8(1094)
  19. Oey LY. 2006. An OGCM with movable land-sea boundaries. Ocean Modelling 13, 176-195. https://doi.org/10.1016/j.ocemod.2006.01.001
  20. Owen MW. 1976. Determination of the settling velocities of cohesive muds. No. INT 161, Hydraulics Research Station Report, Wallingford, United Kingdom.
  21. Parchure TM. 1984. Erosional behavior of deposited cohesive sediment. Ph.D. Dissertation, University of Florida, Gainesvill, Florida.
  22. Park IH. 2004. Evaluation of tidal flow around the pilesupported pier structures. J Korean Soc Marine Environ Eng 7, 82-88.
  23. Park IH, Lee GH and Cho YJ. 2009. Drag coefficient estimation of pile type structures by numerical water basin experiments. J Korean Soc Coastal Ocean Eng 21, 45-53.
  24. Park IH, Lee JS, and Lee MO. 1998. A numerical model of large scale grid for two-dimensional wake behind bodies. J Korean Soc Coastal Ocean Eng 10, 83-82.
  25. Partheniades E. 1965. Erosion and deposition of cohesive soils. J Hydraulic Division ASCE 91, No. HY1, 105-138.
  26. Partheniades E. 1977. Unified view of wash load and bed material load. J Hydraulic Division ASCE 103, No. HY9, 1037-1057.
  27. Reichardt H. 1951. Gesetzmassigkeiten der freien turbulenz. VDI-Forschung-sheft 414(1942), 2nd Edtion.
  28. Rodi W. 1972. The prediction of free turbulent boundary layers by use of two-equation model of turbulence. Ph.D. Thesis, University of London.
  29. Shrestha PL, and Orlob G. 1996. Multiphase distribution of cohesive sediments and heavy metals in estuarine systems. J Environ Eng 122, 730-740. https://doi.org/10.1061/(ASCE)0733-9372(1996)122:8(730)
  30. Shrestha PL, Blumberg AF, Di Toro DM and Hellweger FL. 2000. A three-dimensional model for cohesive sediment transport in shallow bays. Minneapolis: ASCE Proceedings, Joint Conference on Water Resources Engineering and Water Resources Planning and Management.
  31. Teeter AM and Pankow W. 1989. The Atchafalaya River Delta: field data: settling characteristics of bay sediments. Technical Report 2, HL-82-15, Waterways Experiment Station, United States Army Engineers, Vicksburg, Mississippi.
  32. van Rijn LC. 1984. Sediment transport part 1: suspended load transport. J Hydraulic Eng 110, 1613-1641. https://doi.org/10.1061/(ASCE)0733-9429(1984)110:11(1613)
  33. van Rijn LC. 1993. Principles of sediment transport in rivers, estuaries and coastal seas. Amsterdam, Aqua Publications.
  34. Winterwerp JC, Cornelisse JM and Kuijper C. 1991. Erosion of natural sediments from the Netherlands. Report Z161-35/37, Delft Hydraulics, Delft, The Netherlands.
  35. Ziegler CK and Nisbet B. 1994. Fine-grained sediment transport in Pawtuxet River Rhode Island. J Hydraulic Eng 120, 561-576. https://doi.org/10.1061/(ASCE)0733-9429(1994)120:5(561)

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