The research grasps water quality contamination source by investigating the data that are superordinate laws and the related
plans implemented for establishing water quality improvement measures of upper stream for Chung-Ju Dam, present
conditions of the hydraulic and hydrology, the present conditions and plans of environment basic facilities, and present
conditions of main contamination source’s occurrence load and discharge load, etc. The research used the QUAL2E
simulation which is being widely applied to simulation of river water quality because the QUAL2E has high credibility
among water quality simulations known throughout the country. On basis of this research, regulations and politic alternatives
are required in order to water quality improvement upper stream for the Chung-ju dam, especially establishing processing
facilities in the region where loading amount is concentrated should be considered with the additional research regarding
cost-efficient facility of pollution source.