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고랭지밭 밀집지역 초생대의 비점오염 저감 효율 평가- 비점오염원 관리지역을 중심으로 (만대지구, 가아지구, 자운지구) -

Efficiency Evaluation of Vegetative Filter Strip for Non-point Source Pollutant at Dense Upland Areas – Focused on Non-point Source Management Area Mandae, Gaa, and Jaun Basins –

홍지영|이동준|강현우|임경재|장원석|정연지
한국농공학회 (The Korean Society Of Agricultural Engineers)|2022.07|한국농공학회논문집 (Journal of the Korean Society of Agricultural Engineers)|제64권 제4호|pp. 1-10

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참고문헌

키워드

BMPsNon-point source pollutantVFSVFSMOD
주제분류농학

초록

A vegetative filter strip (VFS) is one of the best management practices (BMPs) to reduce pollutant loads. This study aims to assess the effectivenessof VFS in dense upland field areas. The study areas are agricultural fields in the Maedae (MD), Gaa (GA), and Jaun (JU) watersheds, where severesediment yields have occurred and the Korean government has designated them as non-point management regions. The agricultural fields were dividedinto three or four clusters for each watershed based on their slope, slope length, and area (e.g., MD1, MD2). To assess the sediment trapping (STE)and pesticide reduction efficiency (PRE) of VFS, the Vegetative Filter Strip Modeling System (VFSMOD) was applied with three different scenarios(SC) (SC1: VFS with rye vegetation; SC2: VFS with rye vegetation and a gentle slope in VFS range; and SC3: VFS with grass mixture). For SC1,there were relatively short slope lengths and small areas in the MD1 and GA3 clusters, and they showed higher pollutant reduction (STE>50%,PRE>25%). For SC2 and SC3, all clusters in GA and some clusters (MD1 and MD3) in MD show higher pollutant reduction (>25%), while the uplandsin JU still show a lower pollutant (<25%). With correlation analysis between geographic characteristics and VFS effectiveness slope and slope lengthshowed relative higher correlations with the pollutant efficiency than a area. The results of this study implied that slope and slope length should beconsidered to find suitable upland conditions for VFS installations.

Abstract

A vegetative filter strip (VFS) is one of the best management practices (BMPs) to reduce pollutant loads. This study aims to assess the effectivenessof VFS in dense upland field areas. The study areas are agricultural fields in the Maedae (MD), Gaa (GA), and Jaun (JU) watersheds, where severesediment yields have occurred and the Korean government has designated them as non-point management regions. The agricultural fields were dividedinto three or four clusters for each watershed based on their slope, slope length, and area (e.g., MD1, MD2). To assess the sediment trapping (STE)and pesticide reduction efficiency (PRE) of VFS, the Vegetative Filter Strip Modeling System (VFSMOD) was applied with three different scenarios(SC) (SC1: VFS with rye vegetation; SC2: VFS with rye vegetation and a gentle slope in VFS range; and SC3: VFS with grass mixture). For SC1,there were relatively short slope lengths and small areas in the MD1 and GA3 clusters, and they showed higher pollutant reduction (STE>50%,PRE>25%). For SC2 and SC3, all clusters in GA and some clusters (MD1 and MD3) in MD show higher pollutant reduction (>25%), while the uplandsin JU still show a lower pollutant (<25%). With correlation analysis between geographic characteristics and VFS effectiveness slope and slope lengthshowed relative higher correlations with the pollutant efficiency than a area. The results of this study implied that slope and slope length should beconsidered to find suitable upland conditions for VFS installations.

참고문헌 (31)

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