Journal of the Korean Society of Environmental Restoration Technology (한국환경복원기술학회지)

The Korea Society of Environmental Restoration Technology (한국환경복원기술학회)
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Estimation of non-point pollution reduction effect of Haean Catchment by application of Nature-based Solutions

자연기반해법 적용에 따른 강원도 양구군 해안면의 비점오염 저감 효과 추정

  • Lee, Ji-Woo (Dept. of Landscape Architecture, Graduate School of University of Seoul) ;
  • Park, Chan (Dept. of Landscape Architecture, University of Seoul)
  • 이지우 (서울시립대학교 일반대학원) ;
  • 박찬 (서울시립대학교 조경학과)
  • Received : 2022.03.28
  • Accepted : 2022.05.23
  • Published : 2022.06.30
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Abstract

The Ministry of Environment has been working to reduce the impact on biodiversity, ecosystems, and social costs caused by soil runoff from highland Agricultural fields by setting up non-point pollution source management districts. To reduce soil loss, runoff path reduction technology has been applied, but it has been less cost effective. In addition, non-point pollution sources cause environmental conflicts in downstream areas, and recently highland Agricultural fields are becoming vulnerable to climate change. The Ministry of Environment is promoting the optimal management plan in earnest to convert arable land into forests and grasslands, but since non-point pollution is not a simple environmental problem, it is necessary to approach it from the aspect of NbS(Nature-Based Solution). In this study, a scenario for applying the nature-based solution was established for three subwatersheds west of Haean-myeon, Yanggu-gun, Gangwon-do. The soil loss distribution was spatialized through GeoWEPP and the amount of soil loss was compared for the non-point pollution reduction effect of mixed forests and grasslands. When cultivated land with a slope of 20% or more and ginseng fields were restored to perennial grasslands and mixed forests, non-point pollution reduction effects of about 32% and 29.000 tons compared to the current land use were shown. Also, it was confirmed that mixed forest rather than perennial grassland is an effective nature-based solution to reduce non-point pollution.

Keywords

Acknowledgement

본 결과물은 2022년도 서울시립대학교 연구년 교수 연구비에 의하여 연구되었습니다.

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