Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
권호 표지
DOI QR코드

DOI QR Code

A study on the application of modified hydraulic conductivity to consider turbid water for open-cut riverbed infiltration process: numerical modeling approach

개착식 하상여과에서 탁수를 고려한 수정 투수계수 적용 연구: 수치모델링을 통한 접근

  • Received : 2016.07.18
  • Accepted : 2016.08.09
  • Published : 2016.09.30
Download PDF
⟨ Previous Next ⟩

Abstract

Laboratory scale model was constructed for open-cut riverbed infiltration experiment and four kinds of media were selected, medium sand, sand, volcanic rock, and gravel, for the experiment. Hydraulic conductivity for each medium and flow rate from the collecting pipe with functional screen were estimated from the experiment. Modified hydraulic conductivity scenarios considering turbid water (30~50 NTU) were applied in Visual MODFLOW modeling to analyze the effects of turbid water on the flow rate. Twenty-two scenarios were generated considering prticles in turbid water and applied to each medium cases in MODFLOW modeling. The minimum error was occurred when the gravel medium had 20% less hydraulic conductivities for the third layer-depth from the top and clay particles in turbid water might play a role in adsorption process to the surface of volcanic rock (2~5 mm). For medium sand case the error was also quite small when the mediumhas 5% less hydraulic conductivities for the second layer-depth from the top.

개착식 하상여과에 대해서 실험실 규모의 모형을 구축하고 중사, 왕사, 화산석, 자갈에 대한 단일 여재를 구성하였다. 실험을 통해 투수계수 및 하상 여과에 대한 취수량을 추정하고, 지하수 유동 모델링인 Visual MODFLOW를 통해 탁도 변화에 따라 수정된 투수계수를 적용하고 미치는 영향을 분석하였다. 각 여재마다 22개의 수정 투수계수 시나리오가 적용되었다. 전체 모델링에서 최소 오차는 화산석(2~5 mm)을 여재로 한 경우 상부에서부터 3개 지층에 대해서 20% 감소된 투수계수를 적용한 시나리오다. 이는 화산석의 특성상 탁도를 유발하는 황토가 여재에 흡착되어 상부에서 3번째 지층까지 영향을 미치는 것으로 추정되었다. 또한 입자의 크기가 작은 중사의 경우 5% 감소된 투수계수를 상부에서 두 번째 지층까지 적용한 시나리오에서도 작은 오차 값을 나타냈다.

Keywords

References

  1. Baumgarten, B., Jahrig, J., Reemtsma, T., and Jekel, M. (2011). "Long term laboratory column experiments to simulate bank filtration: Factors controlling removal of sulfamethoxazole." Journal of Water Research, Vol. 45, No. 1, pp. 211-220. https://doi.org/10.1016/j.watres.2010.08.034
  2. Cheong, J.Y., Hamm, S.Y., Kim, H.S., Ko, E.J., Yang, K.H., and Lee, J.H. (2008). "Estimating hydraulic conductivity using grain-size analyses, aquifer tests, and numerical nodeling in a riverside alluvial system in South Korea." Hydrogeology Journal, Vol. 16, No. 6, pp. 1129-1143. https://doi.org/10.1007/s10040-008-0303-4
  3. Chung, J.H., Park, J.H., Park, C.K., Yang, J.S., Kim, D.K., Jeong, K.C., Choi, Y.S., and Bu, S.A. (2004). "Calculation of the yield of bank filtration by using the horizontal collector wells." The Journal of Engineering Geology, Vol. 14, No. 4, pp. 417-427 (in Korean).
  4. Eckert, P., and Irmscher, R. (2006). "Over 130 years of experience with riverbank filtration in Dusseldorf, Germany." Journal of Water Supply: Research and Technology-AQUA, Vol. 55, No. 4, pp. 283-291. https://doi.org/10.2166/aqua.2006.0012
  5. Grischek, T., Schoenheinz, D., Worch, E., and Hiscock, K.M. (2002). "Bank filtration in Europe - An overview of aquifer conditions and hydraulic controls, In: Management of Aquifer Recharge for Sustainability." Dillon, P.(ed.) Swets Zeitlinger, Balkema, Lisse, pp. 485-488.
  6. Hamm, S.Y., Cheong, J.Y., Kim, H.S., Hahn, J.S., and Cha, Y.H. (2005). "Groundwater flow modeling in a riverbank filtration area, Daesan - Myeon, Changwon City." Economic and Environmental Geology, Vol. 38, No. 1, pp. 67-78 (in Korean).
  7. Harbaugh, A.W., and McDonald, M.G. (1996). User's Documentation for MODFLOW-96. An update to the U.S. Geological Survey Modular Fivite-Difference Ground-Water Flow Model. Open File Report 96-485, U.S. Geological Survey, Reston, Virginia, U.S.A.
  8. Henzler, A.F., Greskowiak, J., and Massmann, G. (2014). "Modeling the fate of organic micropollutants durign river bank filtration (Berlin, Germany)." Journal of Contaminant Hydrology, Vol. 156, pp. 78-92. https://doi.org/10.1016/j.jconhyd.2013.10.005
  9. Im, H.C., and Choi, H.C. (2011). "Estimation of pumping rate through modeling in open-sut riverbed filtration application area." Proceeding of Korean Society on Water Environment & Korean Society of Water & Wastewater, Il-San, Korea, pp. 419-420 (in Korean).
  10. Kadlec, R.H. (1997). "An autobiotic wetland phosphorus model." Ecological Engineering, Vol. 8, pp. 145-172. https://doi.org/10.1016/S0925-8574(97)00257-7
  11. Kim, H.S., and Jeong, J.H. (2009). "Numerical analysis of horizontal collector well in riverbank filtration." Journal of Soil & Groundwater Environment, Vol. 14, No. 1, pp. 1-10 (in Korean).
  12. Kim, S.H., Sohn, D.B., and Ahn, K.H. (2005). "A study on the reduction of hydraulic conductivity in a model system of riverbed filtration." Journal of the Korean Society of Civil Engineers B, Vol. 25, No. 4B, pp. 301-308 (in Korean).
  13. Kim, T.H., Jeong, J.H., Kim, M., Oh, S.H., and Lee, J.S. (2014). "Analysis of the correlation between geological characteristics and water withdrawals in the laterals of radial collector well." Journal of Engineering Geology, Vol. 24, No. 2, pp. 201-215 (in Korean). https://doi.org/10.9720/kseg.2014.2.201
  14. Lee, S.I., and Lee, S.S. (2008). "Site sustainable and development amount assessment for riverbank filtration in the Han river (I)." Journal of Korea Water Resources Association, Vol. 41, No. 8, pp. 825-834 (in Korean). https://doi.org/10.3741/JKWRA.2008.41.8.825
  15. Lee, S.I., Yoo, S.Y., and Lee, S.S. (2008). "Site sustainable and development amount assessment for riverbank filtration in the Han river (II)." Journal of Korea Water Resources Association, Vol. 41, No. 8, pp. 835-843 (in Korean). https://doi.org/10.3741/JKWRA.2008.41.8.835
  16. Schafer, D.C. (2004). "Hydraulic analysis and modeling of riverbank filtration for Louisville water company." International Workshop on Riverbank/bed Filtration, organized by KIST (Green Korea 21), COEX.
  17. Schubert, J. (2002). "Hydraulic aspects of riverbank filtration-Field studies." Journal of Hydrology, Vol. 266, pp. 145-161. https://doi.org/10.1016/S0022-1694(02)00159-2
  18. Ulrich, C., Hubbard, S.S., Florsheim, J., Rosenberry, D., Borglin, S., Trotta, M., and Seymour, D. (2015). "Riverbed clogging associated with a California riverbank filtration system: An assessment of mechnisms and monitoring approaches." Journal of hydrology, Vol. 529, pp. 1740-1753. https://doi.org/10.1016/j.jhydrol.2015.08.012