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Pollutant Load Characteristics by Baseflow in a Small Agricultural Watershed  

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)
Publication Information
Journal of Korean Society on Water Environment / v.22, no.2, 2006 , pp. 244-249 More about this Journal
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
Baseflow; Hydrograph separation; Pollutant loads; Streamflow; Web-based Hydrograph Analysis Tool (WHAT);
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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