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감수곡선을 이용한 산림소유역 유출특성의 시계열 변화 평가

Analysis of Secular Changes in the Hydrological Characteristics of a Small Forested Watershed using a Baseflow Recession Curve

  • Lee, Ik-Soo (Department of Forest Resources, Yeungnam University) ;
  • Lee, Heon-Ho (Department of Forest Resources, Yeungnam University)
  • 투고 : 2013.09.16
  • 심사 : 2014.07.18
  • 발행 : 2014.09.30

초록

본 연구는 주지하수 감수곡선을 이용하여 산림소유역의 유출특성을 밝히기 위하여 수행하였다. 2003년부터 2011년까지 9년간 관측한 강우-유출량 자료를 이용하여 수문곡선 감수부의 시계열 변화를 분석하였다. 그 결과 산림소유역에서는 직접유출 감수계수가 기저유출의 감수계수 값보다 작았다. 또한 산림소유역에서의 직접유출량은 대유역에 비해 상당히 적은 양을 보였으며, 기저유출량은 차이가 크지 않았다. 시험유역에서 주지하수 감수곡선의 회귀식과 감수계수는 각각 $y=0.7528e^{-0.022x}$($R^2=0.8938$, 범위는 0.3 mm~0.8 mm), K = 0.978로 산출되었다. 주지하수 감수곡선과 연유출량과는 관련성이 큰 것으로 나타났는데, 유출량이 많으면 주지하수 감수곡선의 기울기가 완만해지고, 유출량이 줄어들면 감수곡선의 기울기가 급해지는 것으로 나타났다. 또한 해를 거듭할수록 주지하수 감수곡선의 기 울기가 완만해지는 경향이 나타나, 점차 기저유출량이 증가하는 것으로 판단하였다. 따라서 시험유역에서는 시간의 경과와 함께 산림의 홍수조절기능 및 수원함양기능이 점진적으로 높아지는 것으로 나타났다.

Long-term changes in the hydrological characteristics of a small forest watershed were examined using a master baseflow recession curve and the measured rainfall-runoff data from the experimental forest watershed in the measured years 2003-2011. The results of the study showed that the recession coefficient of direct runoff was lower than that of baseflow. In small forested watershed, the direct flow was lower than that of large scale watershed, flow due to its shorter period of occurrence. And baseflow was similar to large scale watershed's. A regression equation $y=0.7528e^{-0.022x}$($R^2=0.8938$, range 0.3~0.8 mm) was obtained using the master baseflow recession curve for the study period and the recession coefficient was calculated as K = 0.978. Changes between master baseflow recession curve and runoff showed great association and relevance such as increasing runoff was associated with the gentle slope of master baseflow recession curve and decreasing runoff was associated with the slope of master baseflow recession curve contrary. In the later years of the study period, the slope of the master baseflow recession curve appreciably became more gentle due to increases in baseflow. This suggests that the forested experimental watershed exhibit improved structural functioning of normal flood control and reduced occurrence of water shortage problems.

키워드

참고문헌

  1. Barnes, B.S. 1939. The Structure of Discharge-Recession Curves. Trans. Transactions, American Geophysical Union 20: 721-725. https://doi.org/10.1029/TR020i004p00721
  2. Chorley, R.J. 1978. The hillslope hydrological cycle, Chapter 1 of Hillslope Hydrology, M.J. Kirkby (ed). Wiley-Interscience Publication.
  3. Hammond, M. and Han, D. 2006. Recession curve estimation for storm event separations. Journal of Hydrology 330: 573-585. https://doi.org/10.1016/j.jhydrol.2006.04.027
  4. Hewlett, J.D. 1984. Forest, Flood, and Erosion : A watershed experiment in the south eastern Pidmont. Forest Science 30: 424-434.
  5. Hong, E.M. 2009. Analysis of soil moisture extraction characteristics in conifer forest. M.S. Thesis. seoul national university. pp. 80.
  6. Joo, H.J. 1987. The Estimation of Streamflow recession Constants and the Synthesis of Base Flow. Master's Thesis, Korea University. pp. 63.
  7. Kim, G.S. and Jo, K.T. 2000. A Study on the Base Flow Recession Curve Development in the Ssangchi Basin of the Sumjin River. Journal of the Korean Society of Groundwater Environment 7(2): 66-72.
  8. Klassen, B. and Pilgrim D.H. 1975. Hydrograph recession constants for New South Wales stream. The Institute of Engineers, Australia, Civil Engineering Transactions. pp. 43-49.
  9. Lee, D.R. 1995. Application of the groundwater recession curves to estimate groundwater recharge and to forecast long-term low-flow. PhD Thesis, Korea University. pp. 359.
  10. Lee, J.C., Park, Y.K., and Kim, O.G. 2001. A Study on the Investigation for Recession Constant Computation Methods. Iksan National College 9: 231-241.
  11. Lee, W.H. and Kim, J.H. 1985. An Analysis of the Relationship between Rainfall and Recession Hydrograph for Base Flow Separation. Korea Water Resources Association 18(1): 85-94.
  12. Martin, G.N. 1973. Characterization of simple exponential baseflow recession. Journal of Hydrology. pp. 57-62.
  13. Millares, A., Polo, M.J., and Losada, M.A. 2009. The hydrological response of baseflow in fractured mountain areas. Hydrology and Earth System Science Discuss 6: 3359-3384. https://doi.org/10.5194/hessd-6-3359-2009
  14. Moon, S.K. and Woo, N.C. 2001. Estimation of Groundwater Recharge Ratio Using Cumulative Precipitation and Water-level Change. Journal of the Korean Society of Groundwater Environment 6(1): 33-43.
  15. Nathan, R.J. and Mcmachon, T.A. 1990. Evaluation of automated techniques for baseflow and recession analyses. Water Resource Research 26(7): 1465-1473.
  16. Singh, K.P. 1968. Some factors affecting baseflow. Water Resource Research 4: 985-999. https://doi.org/10.1029/WR004i005p00985
  17. Somorowaska, U. 2004. Inferring changes in dynamic groundwater storage from recession curve analysis of discharge data. Miscellanea geographic warszawa, Vol. 11.
  18. Tallaken, L.M. 1995. A review of baseflow recession analysis. Journal of Hydrology 165: 349-370. https://doi.org/10.1016/0022-1694(94)02540-R
  19. Tischendorf, W.G. 1969. Tracing storm flow to varying source areas in a small forested watershed in the southeastern Piedmont. Ph.D. Dissertation. University of Georgia, Athens, Georgia.
  20. Vogel, R.M. and Kroll, C.N. 1992. Regional geohydrologicgeo-morphic for the estimation of low-flow statics. Water Resources Research 28(9): 2451-2458. https://doi.org/10.1029/92WR01007

피인용 문헌

  1. Tree-ring reconstruction of streamflow for Palgong Mountain forested watershed in southeastern South Korea vol.14, pp.1, 2017, https://doi.org/10.1007/s11629-016-3860-3
  2. Applicability Assessment of Estimation Methods for Baseflow Recession Constants in Small Forest Catchments vol.10, pp.8, 2018, https://doi.org/10.3390/w10081074
  3. 산지계류에 있어서 홍수기의 강우사상에 대한 유출수문곡선 분리 및 특성 분석 vol.54, pp.1, 2014, https://doi.org/10.11614/ksl.2021.54.1.049