Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on Parameter Estimation for SWAT Calibration Considering Streamflow of Long-term Drought Periods

장기 가뭄기간의 유출량을 고려한 SWAT 보정 매개변수 추정 연구

  • Kim, Da Rae (Department of Civil, Environmental and Plant Engineering, Konkuk University) ;
  • Kim, Seong Joon (Department of Civil, Environmental and Plant Engineering, Konkuk University)
  • Received : 2016.08.05
  • Accepted : 2017.01.20
  • Published : 2017.03.31
Download PDF
⟨ Previous Next ⟩

Abstract

Recently, the hydrological model Soil Water Assessment Tool (SWAT) has been applied in many watersheds in South Korea. This study estimated parameters in SWAT for calibrating streamflow in long-term drought periods. Therefore, we focused on the continuous severe drought periods 2014~2015, and understand the model calibrated parameters. The SWAT was applied to a $366.5km^2$ Gongdo watershed by using 14 years (2002~2015) daily observed streamflow (Q) including two years extreme drought period of 2014~2015. The 9 parameters of CN2, CANMX, ESCO, SOL_K, SLSOIL, LAT_TIME, GW_DELAY, GWQMN, ALPHA_BF were selected for model calibration. The SWAT result by focusing on 5 normal years (2002~2006) calibration showed the 14 years average Nash-Sutcliffe model efficiency (NSE) for Q and 1/Q with 0.78 and 0.58 respectively. On the other hand, the 14 years average NSEs of Q and 1/Q by focusing on 2 drought years (2014~2015) calibration were 0.86 and 0.76 respectively. Thus, we could infer that the SWAT calibration trial by focusing on drought periods data can be a good approach to calibrate both high flow and low flow by controlling the 9 drought affected parameters.

Keywords

References

  1. Ahn, S. R., G. A. Park, and S. J. Kim, 2013a. Assessment of Agricultural Water Supply Capacity Using MODIM-DSS Coupled with SWAT. Journal of the Korean Society of Civil Engineers 33(2): 507-519 (in Korean). https://doi.org/10.12652/Ksce.2013.33.2.507
  2. Ahn, S. R., G. A. Park, C. H. Jang, and S. J. Kim, 2013b. Assessment of Climate Change Impact on Evapotranspiration and Soil Moisture in a Mixed Forest Catchment Using Spatially Calibrated SWAT Model. Journal of the Korea Water Resources Association 46(6): 569-583 (in Korean). https://doi.org/10.3741/JKWRA.2013.46.6.569
  3. Hong, W. Y., M. J. Park, J. Y. Park, R. Ha, G. A. Park, and S. J. Kim, 2009. The Correlation Analysis Between SWAT Predicted Forest Soil Moisture and MODIS NDVI During Spring Season. Journal of the Korean Society of Civil Engineers 51(2): 7-14 (in Korean).
  4. Jung, Y. H., C. G. Jung, S. W. Jung, J. Y. Park, and S. J. Kim, 2012a. Estimation of Upstream Ungauged Watershed Streamflow using Downstream Discharge Date. Journal of the Korean Society of Agricultural Engineers 54(6): 169-176 (in Korean). https://doi.org/10.5389/KSAE.2012.54.6.169
  5. Jung, C. G., H. K. Joh, J. Y. Park, and S. J. Kim, 2012b. Runoff Characteristics Comparison of Nonpoint Source Pollution for Two Adjacent Stream Watersheds using SWAT Model. Journal of the Korean Society of Agricultural Engineers 54(3): 91-101 (in Korean). https://doi.org/10.5389/KSAE.2012.54.3.091
  6. Kim, N. W., S. C. Shin, and C. G. Kim, 2003. The sensitivity analysis of parameters in SWAT model. Korean Society of Civil Engineers Conference. 2264-2268 (in Korean).
  7. Pushpalatha, R., C. Perrin, N. L. Moine, and V. Andreassian, 2012. A review of efficiency criteria suitable for evaluating low-flow simulations. Journal of Hydrology 420-421, 171-182. https://doi.org/10.1016/j.jhydrol.2011.11.055
  8. Singh, J., H. Vernon Knapp, J. G. Arnold, and M. Denissie, 2005. Hydrological Modeling of the Iroquois River Watershed Using HSPF and SWAT. Journal of the American Water Resources Association 41(2): 343-360. https://doi.org/10.1111/j.1752-1688.2005.tb03740.x
  9. Shin, H. S. and D. K. Kang, 2006. Journal of the Korea Water Resources Association 39(3): 227-240 (in Korean). https://doi.org/10.3741/JKWRA.2006.39.3.227
  10. Wu, K. and C. A. Johnston, 2007. Hydrologic response to climatic variability in a Great Lakes Watershed: A case study with the SWAT model. Journal of hydrology 337: 187-199. https://doi.org/10.1016/j.jhydrol.2007.01.030
  11. Zhang, H., G. H. Huang, D. Wang, and X. Zhang, 2011. Multiperiod calibration of a semi-distributed hydrological model based on hydroclimatic clustering. Journal of Advances in Water Resources 34(5): 1292-1303. https://doi.org/10.1016/j.advwatres.2011.06.005