This study evaluates treatment efficiencies of pollutants in Boknae bio-park constructed wetlands
surrounding Juam Lake for 5 years from January 2006 to December 2010, in order to treat non-point pollutants
effectively. The analysis of monthly treatment efficiency of pollutants shows that the scope of BOD is –19.11∼
37.72%, and of COD is 30.14∼27.38%, thus the monthly deviation COD is relatively higher than BOD, and the
scope of SS is –54.07∼64.82%. Moreover, the analysis of seasonal treatment efficiency of pollutants shows that the
treatment efficiency of TN is higher than 36.8% on average for 5 years in the spring and winter, and of TP
relatively lower than other pollutants, however, the seasons don’t make much difference to the treatment efficiency
of TP.