Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Evaluation of SWAT Model for Nutrient Load from Small Watershed in Juam Lake

주암호 소유역의 영양물질 부하 추정을 위한 SWAT 모형의 적용성 평가

  • Jung, Jae-Woon (Rural Research Institute, Korea Rural Community & Agriculture Corporation) ;
  • Yoon, Kwang-Sik (Department of Biosystems & Agricultural Engineering, Chonnam Natational University) ;
  • Han, Kuk-Heon (Rural Research Institute, Korea Rural Community & Agriculture Corporation) ;
  • Choi, Woo-Young (Department of Biosystems & Agricultural Engineering, Chonnam Natational University) ;
  • Lee, Jun-Bae (Yeongsan River Environment Research Laboratory, National Institute of Environmental Research) ;
  • Choi, Hun-Geun (Yeongsan River Environment Research Laboratory, National Institute of Environmental Research)
  • 정재운 (한국농어촌공사 농어촌연구원) ;
  • 윤광식 (전남대학교 생물산업공학과) ;
  • 한국헌 (한국농어촌공사 농어촌연구원) ;
  • 최우영 (전남대학교 생물산업공학과) ;
  • 이준배 (국립환경과학원 영산강물환경연구소) ;
  • 최훈근 (국립환경과학원 영산강물환경연구소)
  • Published : 2009.09.30
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Abstract

For the assesment of pollutant loads, a monitoring has been conducted to identify hydrologic conditions and water quality of the Oenam watershed in Juam Lake, and the SWAT model integrated with GIS was applied to the watershed and evaluated for its applicability through calibration and verification using observed data. For the model application, digital maps were constructed for watershed boundary, land-use, soil series, digital elevation, and topographic input data of the Oenam watershed using Arcview. The observed runoff was 832.8 mm while the simulated runoff was 842.8 mm in 2003. The model results showed that the simulated runoff was in a good agreement with the observed data and indicated reasonable applicability of the model. In terms of nutrient load, the simulation results of T-N, T-P showed a similar trend to observed values. The observed T-N load was 10.8 kg/ha and the simulated T-N load was 7.6 kg/ha while the observed T-P load was 0.21 kg/ha and the simulated T-P load was 0.18 kg/ha. In general, SWAT model predicted observed runoff and loads of T-N and T-P after calibration with observed data in acceptable range. Overall, SWAT model was satisfactory in estimation of nutrient pollutant loads of the rural watershed.

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References

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