In this study, the discharge loads of non-point pollution sources were analyzed using a Hydrologic Simulation Program-Fortran (HSPF) model for 46 sub-watersheds in order to guide the management plan for water and streams passing through the city. The results using HSPF showed good applicability in comparison to point measurements, which were based on BOD, TP, and TN. The mean value of the BOD loads was 4.08 kg/km2 per day, and the highest level of BOD was 17.75 kg/km2 per day at Namri. Three potential areas of high priority for the installment of constructed wetlands were selected in order to reduce non-point pollution sources based on BOD loads and on environmental and economic conditions. The results for these scenarios indicated a maximum rate of reduction in BOD of 39.12% within the proposed constructed wetlands.

Abstract
 1. Introduction
 2. Materials and Methods
  2.1. Target area
  2.2. Overview of the HSPF model
  2.3. Model construction
 3. Results and Discussion
  3.1. Model building
  3.2. HSPF modeling
  3.3. Pollutants discharged in unit watershed area
  3.4. Assessment of appropriate technology applications
 4. Conclusion
 REFERENCES

• Dohun Lim(Korea Natural Environment Institute)
• Yoonjin Lee(Department of General Education, Konyang University) Corresponding author