Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Analysis of Total Nitrogen Reduction Efficiency with Established Riparian Buffer System using SWAT-REMM Model in Bonggok Watershed

SWAT-REMM 모형을 이용한 봉곡천 유역의 수변림 조성에 따른 총 질소 저감 효율 분석

  • Ryu, Jichul (Department of Regional Infrastructure Engineering, Kangwon National University) ;
  • Kang, Hyunwoo (Department of Regional Infrastructure Engineering, Kangwon National University) ;
  • Kim, Nam Won (Korea Institute of Construction Technology) ;
  • Jang, Won Seok (Department of Regional Infrastructure Engineering, Kangwon National University) ;
  • Lee, Ji Won (Department of Regional Infrastructure Engineering, Kangwon National University) ;
  • Moon, Jong-pil (National Academy of Agricultural Science) ;
  • Lee, Kyu-seung (Bio Environmental Chemistry, Chungnam National University) ;
  • Lim, Kyoung Jae (Department of Regional Infrastructure Engineering, Kangwon National University)
  • 류지철 (강원대학교 지역건설공학과) ;
  • 강현우 (강원대학교 지역건설공학과) ;
  • 김남원 (한국건설기술연구원) ;
  • 장원석 (강원대학교 지역건설공학과) ;
  • 이지원 (강원대학교 지역건설공학과) ;
  • 문종필 (농촌진흥청 국립농업과학원) ;
  • 이규승 (충남대학교 생물환경화학과) ;
  • 임경재 (강원대학교 지역건설공학과)
  • Received : 2010.06.14
  • Accepted : 2010.09.13
  • Published : 2010.11.30
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Abstract

In recent years, riparian buffer system has been known as one of the effective best management practices. However, establishment of riparian buffer system in aspect of plant species and its position in the riparian buffer zone has not been investigated due to lack of efficient evaluation method for the analysis of water quality improvement with established riparian buffer system. To solve this problem, the SWAT-REMM prototype was developed by the researchers in Canada. But, SWAT-REMM model can not consider the $NO_3-N$ load into riparian buffer system through subsurface flow. Thus to solved this problem, Fortran code of SWAT-REMM model was modified. This modified SWAT-REMM system was applied to the Bonggok watershed. Three riparian buffer scenarios, 15 m, 10 m, 5 m width for tree and grass, were made to evaluate the effects of riparian buffer system on water quality improvement. Reduction efficiency of T-N by riparian buffer system of 15 m wide was the greatest (6 ~ 37%, depending on subwatershed characteristics) among 3 scenarios. It indicates that the reduction efficiency of T-N load has increasing-tendency, as buffer width increasing. The results obtained from the analysis showed that wide buffer zones are found to be more effective in reducing non-point pollutant than narrow buffer zones in the riparian buffer zone system. Hence, the SWAT-REMM model could be efficiently used for evaluation and design the most effective riparian buffer systems to reduce pollutant loads to the watershed although many limitations still exist in SWAT-REMM model.

Keywords

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