Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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A Plot Scale Experiment to Analysis the NPS Reduction by Silt Fence and Vegetated Ridge for Non-Irrigated Cropland

실트펜스와 식생밭두렁 적용을 통한 밭 비점오염 저감효과 분석을 위한 포장실험 연구

  • 김성재 (경상대학교 대학원 농공학과) ;
  • 박태양 (경상대학교 대학원 농공학과) ;
  • 김성민 (경상대학교 대학원 농공학과) ;
  • 장정렬 (한국농어촌공사 농어촌연구원) ;
  • 김상민 (경상대학교 지역환경기반공학과(농업생명과학연구원))
  • Received : 2012.02.23
  • Accepted : 2012.05.09
  • Published : 2012.07.31
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Abstract

The objective of this study was to test the pollutant reduction effect by the silt fence and vegetated ridge through field monitoring. The experiment plots were established with two replication and three treatments. Each plot was designed with 5 m width, 22 m length, and 3 % slope. Flumes with the floating type stage gages were installed at the outlet of each plot to monitor the runoff. For a rainfall monitoring, tipping bucket rain gage was installed within the experiment site. Cultivated crops were spring daikon and autumn chinese cabbage. Analysis of variance (ANOVA) indicated that the water quality concentration from three experiment plots were not significantly different in 5 % of significant level. The monitoring results showed that the average pollution loads reduced by silt fence compared to control were SS 75.33 %, TN 40.87 %, TP 56.58 %, BOD 52.12 %, COD 36.07 %, TOC 34.99 %; by vegetated ridge compard to control were SS 65.27 %, TN 81.80 %, TP 54.26 %, BOD 67.09 %, COD 46.55 %, TOC 43.30 %. Analysis of Spearman's rank correlation coefficient showed that BOD-SS and SS-Turbidity were highly related at the silt fence and vegetated ridge plots. In all plots, SS-Turbidity and TP-TN relations were relatively high. The monitoring results showed that the silt fence and vegetated ridge were effect method to reduce the pollutant loads from the field runoff. Long-term monitoring is required to obtain more quantitative reduction effect for diverse crops and to increase the reliability of results.

Keywords

Acknowledgement

Grant : 새만금유역 농업비점오염저감기법개발 공동 연구 - 밭 비점오염 저감 및 최적관리기법 개발

Supported by : 농어촌연구원

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