KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
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Sensitivity Analysis of Hydrogeologic Parameters by Groundwater Table Fluctuation Model in Jeju Island

지하수위 변동 해석모델을 이용한 제주지역의 수리지질 매개변수 민감도 분석

  • Kim, Nam Won (Korea Institute of Civil Engineering and Building Technology) ;
  • Kim, Youn Jung (Korea Institute of Civil Engineering and Building Technology) ;
  • Chung, Il-Moon (Korea Institute of Civil Engineering and Building Technology)
  • Received : 2014.03.24
  • Accepted : 2014.07.15
  • Published : 2014.10.01
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Abstract

In this work, we have carried out a sensitivity analysis of hydrogeologic parameters such as reaction factor and drainable pore space in groundwater table fluctuation model and have found characteristics of parameter distribution according to the altitude. We found that drainable pore space which is hydrogeologic parameter of aquifer didn't show any trend with altitude while reaction factor which is groundwater flow characteristic showed clear trend with altitude. To find a sensitivity of parameters, we compared RMSE of estimated groundwater recharges by using the mean value and linear relationship of parameters. As results, the linear equation derived for entire watersheds could be applied to estimate parameters for ungauged watershed. Furthermore, the features of parameter distribution can be used to predict hydrogeologic parameter in ungauged watersheds and it is expected that those features could be used for a basic data for groundwater modeling.

지하수위 변동 해석모델을 이용하여 제주지역의 대수층 수리지질 매개변수인 반응계수와 배수가능공극을 추정하고 고도에 따른 분포특성 및 민감도분석을 실시하였다. 대수층 매질의 특성치인 배수가능공극은 고도에 대해 일정한 경향성을 보이지 않으며 지하수의 흐름 특성치인 반응계수는 고도가 높아질수록 낮아지는 뚜렷한 경향성을 보였다. 매개변수들에 대한 민감도를 알아보기 위해 매개변수의 평균 및 관계식을 이용하여 추정함양량을 비교한 결과, 전 유역(강정천, 외도천, 천미천, 한천)에 대한 매개변수 관계식을 적용하여도 미계측 유역내 매개변수의 추정이 가능할 것으로 판단된다. 따라서 본 연구의 결과를 통해 대표적인 수리지질 매개변수의 분포특성을 파악하여 미계측지역에서 매개변수를 추정함으로써 지하수모델링의 기초자료로도 활용 가능할 것으로 기대한다.

Keywords

References

  1. Bouwer, H. and J. Van Schilfgaarde. (1962). "Simplified prediction method for rainfall of the watertable in drained land." American Society of Agricultural Engineers winter meeting.
  2. Cho, J. W. and Park, E. G. (2008). "A study on delineation of groundwater recharge rate using water-table fluctuation and unsaturate zone soil water content model." Journal of the Korean Society of Groundwater Environment, Vol. 13, No. 1, pp. 67-76.
  3. Choi, B. S. and Ahn, J. G. (1998). "A study on the estimation of regional groundwater rechargera." Journal of the Korean Society of Groundwater Environment, Vol. 5, No. 2, pp. 57-65.
  4. Chung, I. M., Lee, J. W., Kim, J. T., Na, H. N. and Kim, N. W. (2011). "Development of threshold runoff simulation method for ronoff analysis of Jeju Island." Journal of the Environmental Sciences, Vol. 20, No. 10, pp. 1347-1355. https://doi.org/10.5322/JES.2011.20.10.1347
  5. Fetter, C. W. (2000). "Applied hydrogeology." Prentice-Hall press.
  6. Healy, R. W. and Cook, P. G. (2002). "Using groundwater levels to estimated recharge." Hydrogeology Journal, Vol. 10, pp. 91-109. https://doi.org/10.1007/s10040-001-0178-0
  7. Kim, G. B., Choi, D. H. and Jeong, J. H. (2010). "Considerations on the specific yield estimation using the relationship between rainfall and groundwater level variations." Journal of Engineering Geology, Vol. 20, No. 1, pp. 61-70.
  8. Kim, N. W., Chung, I. M. and Na, H. N. (2013a). "A method of simulating ephemeral stream runoff characteristics in cheonmi-cheon watershed, Jeju island." Journal of Environmental Science International, Vol. 22, No. 5, pp. 523-531. https://doi.org/10.5322/JESI.2013.22.5.523
  9. Kim, N. W., Chung, I. M., Yoo, S. Y., Lee, J. W. and Yang, S. K. (2009). "Integrated surface-groundwater analysis in Jeju island." Journal of the Environmental Sciences, Vol. 18, No. 9, pp. 1017-1026. https://doi.org/10.5322/JES.2009.18.9.1017
  10. Kim, N. W., Kim, Y. J. and Chung, I. M. (2013b). "Development of analyzing model of groundwater table fluctuation (I) : Theory of Model." Journal of the Korean Society of Civil Engineers, Vol, 33, No. 6, pp. 2277-2284. https://doi.org/10.12652/Ksce.2013.33.6.2277
  11. Kim, N. W., Kim, Y. J. and Chung, I. M. (2013c). "Development of analyzing model of groundwater table fluctuation (II) : Characteristics of Recharge." Journal of the Korean Society of Civil Engineers, Vol, 33, No. 6, pp. 2285-2291. https://doi.org/10.12652/Ksce.2013.33.6.2285
  12. Kim, N. W., Kim, Y. J. and Chung, I. M. (2014) "A study on the characteristics of parameters in groundwater table fluctuation model." Journal of Environmental Science International, Vol. 23, No. 4, pp. 615-623. https://doi.org/10.5322/JESI.2014.4.615
  13. Kim, N. W., Na, H. N. and Chung, I. M. (2013d). "Simulation of groundwater variation characteristics of hancheon watershed in Jeju island using integrated hydrologic modeling." Journal of Environmental Science International, Vol. 22, No. 5, pp. 515-522. https://doi.org/10.5322/JESI.2013.22.5.515
  14. Smedema, L. K. and Rycroft, D. W. (1983). "Land drainage-planning and design of agricultural." Drainage Systems, Cornel University Press, Ithaca, NY.
  15. Sustainable Water Resources Research Center (2010). Development and application of the integrated SWAT-MODFLOW model report.
  16. Yun, S. W., Jo, Y. J. and Lee, J. Y. (2009). "Comparison of groundwater recharges estimated by waterlevel fluctuation and hydrograph separation in haean basin of Yanggu." Journal of the Geological Society of Korea, Vol. 45, No. 4, pp. 391-404.

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