Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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Analysis of Sediment Reductions Effects of VFS Systems for the General Characteristics of Uplands in Korea

우리나라 일반적인 밭경지 특성을 고려한 초생대 유사저감효과 분석

  • 서정훈 (경북대학교 농업토목공학과) ;
  • 최경숙 (경북대학교 농업토목공학과)
  • Received : 2013.06.19
  • Accepted : 2013.07.16
  • Published : 2013.07.31
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Abstract

This study focused on the sediment reduction effects of VFS (vegetative filter strip) systems for the general characteristics of uplands in Korea. General conditions of upland fields were investigated through national scales of annual agricultural statistics. 7-15 % of slope with loam soil was the dominant types of uplands, and the hydrologic soil group feature usually belong to Type B. The common sizes of uplands were bigger than 0.1 ha and less than 0.2 ha, and 86.2 % of them account for less than 1.0 ha. With this information, 0.1 ha, 0.5 ha, and 1.0 ha of uplands with various shapes and 7-15 % of slopes were considered for the VFS system simulations. 20 mm, 40 mm, and 100 mm of daily precipitation were applied. As a result, the trapping efficiencies of VFS systems were obtained 37.4~100 % for 7 % slope and 18.1~98.0 % for 15 % slope of the less than 1.0ha of uplands. As rainfall increased, sediment loads also increased with slope and slope length increase. Also as size and slope of uplands and slope length increased with VFS length decrease, the trapping efficiency decreased for the same amount of rainfall. The optimum lengths of VFS systems for the givien upland conditions were suggested based on the modelling results with condition of VFS length less than 20 % of upland areas.

Keywords

References

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  2. Selection of Appropiate Plant Species of VFS (Vegetative Filter Strip) for Reducing NPS Pollution of Uplands vol.47, pp.10, 2014, https://doi.org/10.3741/JKWRA.2014.47.10.973