Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
권호 표지

Pollutant Load Characteristics by Baseflow in a Small Agricultural Watershed

농업소하천 유역의 기저유출에 의한 오염부하특성

  • Shin, Yongchul (Department of Agricultural Engineering, Kangwon National University) ;
  • Lyou, Changwon (Department of Agricultural Engineering, Kangwon National University) ;
  • Choi, Ye Hwan (Department of Agricultural Engineering, Kangwon National University) ;
  • Lim, Kyuong Jae (Department of Agricultural Engineering, Kangwon National University) ;
  • Choi, Joongdae (Department of Agricultural Engineering, Kangwon National University)
  • 신용철 (강원대학교 농업공학부 지역기반공학 전공) ;
  • 류창원 (강원대학교 농업공학부 지역기반공학 전공) ;
  • 최예환 (강원대학교 농업공학부 지역기반공학 전공) ;
  • 임경재 (강원대학교 농업공학부 지역기반공학 전공) ;
  • 최중대 (강원대학교 농업공학부 지역기반공학 전공)
  • Received : 2005.10.06
  • Accepted : 2005.11.22
  • Published : 2006.03.30
Download PDF
⟨ Previous Next ⟩

Abstract

Natural environment of Weolgokri watershed has been well preserved as a traditional agricultural watershed. A year record of streamflow, $NO_3-N$, T-N and T-P concentrations data (April 2004 - Mar. 2005) were examined to estimate annual and seasonal patterns of pollutant loads in streamflow and baseflow from the agricultural watershed. To estimate pollutant loads from baseflow, baseflow component was separated from streamflow using the digital filter method in the Web-based Hydrograph Analysis Tool system and loads of $NO_3-N$, T-N and T-P from streamflow and baseflow were evaluated. The $NO_3-N$, T-N, and T-P loads from streamflow were 13.85 kg/ha, 45.92 kg/ha and 1.887 kg/ha, respectively, while corresponding loads from baseflow were 7.43 kg/ha, 24.70 kg/ha, 0.582 kg/ha, respectively. It was found that $NO_3-N$ and T-N loads were contributed slightly more by the baseflow (53% and 53% of Total-loads) than by the direct runoff (47% and 47% of Total loads). However, only 30% of total T-P load was contributed by the baseflow. It is recommended that one needs to assess pollutant load contribution by the baseflow to identify appropriate pollution control strategies for an effective watershed management.

Keywords

Acknowledgement

Supported by : 한강수계관리위원회

References

  1. 최중대, 이찬만, 최예환, 토지이용이 농업소유역의 수질에 미치는 영향, 한국수자원학회논문집, 32(4), pp. 501-510 (1999)
  2. 최중대, 농업소유역의 지하수 수질과 하천수질 평가, 강원 대학교 환경연구소 중점연구소 지원 연구결과 및 연례 학술발표회 논문집, pp. 5-9 (2001)
  3. 환경부, 수질오염공정시험법 (1996)
  4. 한강수계관리위원회, 친환경적 농업관리에 의한 오염부하의 저감효과 분석 (2003)
  5. Arnold, J. G. and Allen, P. M., Validation of Automated Methods for Estimating Baseflow and Groundwater Recharge from Stream Flow Records, J. Am. Water Resour. Asso., 35(2), pp. 411-424 (1999) https://doi.org/10.1111/j.1752-1688.1999.tb03599.x
  6. Eckhardt, K., How to Construct Recursive Digital Filters for Baseflow Separation, Hydrol. Process., 19(2), pp. 507-515 (2005) https://doi.org/10.1002/hyp.5675
  7. Hallberg, G. R., Nitrates in Ground Water in Iowa. In: D'ltri, F.M., Wolfson, L. G. (Eds.), Rural Ground Water Contamination, Lewis, Chelsea Michigan (1987)
  8. Lim, K. J., Engel, B. A., Tang, Z., Choi, J., Kim, K., Muthukrishnan, S. and Tripathy, D., Automated Web GIS-based Hydrograph Analysis Tool, WHAT. J. Am. Water Resour. Asso., 41(6), pp. 1407-1416 (2005) https://doi.org/10.1111/j.1752-1688.2005.tb03808.x
  9. Lyne, V. D. and Hollick, M., Stochastic Time-variable Rainfall-runoff Modeling, Proceedings of Hydro. and Water Resour. Symp., Institution of Engineers Australia, Perth. pp. 89-92 (1979)
  10. Nahatan, R. J. and McMahon, T. A., Evaluation of Automated Techniques for Baseflow and Recession Analysis, Water Resour. Res., 26(7), pp. 1465-1473 (1990)
  11. Schilling, K. E., Chemical Transport from Paired Agricultural and Restored Prairie Watersheds, J. Envion. Qual., 31, pp. 1846-1851 (2002)
  12. Schilling, K. and Zhang, Y., Baseflow Contribution to Nitrate-nitrogen Export from a Large, agricultural watershed, USA., J. of Hydrol., 295, pp. 305-316 (2004) https://doi.org/10.1016/j.jhydrol.2004.03.010
  13. Zecharias, Y. B. and Brutsaert, W., Recession Characteristics of Groundwater Outf1ow and Baseflow from Mountainous watersheds, Water Resour.. Res., 24(10), pp. 1651-1658 (1988) https://doi.org/10.1029/WR024i010p01651