| Title |
Research about water conservation on upstream of the Han river ( 2 ) - Water quality Modeling and predict - |
| Authors |
허인량(In Ryang Huh),이건호(Geon Ho Yi),최지용(Ji Yong Choi),정의호(Ui Ho Jeong),이용석(Yong Seok Lee) |
| Abstract |
This study was performed to find out water quality characteristics and then to predict water quality of Pyongchang river and Juchon river, which are the major tributaries of the Han river, S. Korea. According to this study, BOD decay coefficient of the main stream of Pyongchang river was appeared to be 0.120∼0.250day^(-1), Juchon river 0.166∼0.225day^(-1) and the effect of BOD coefficient of K₃ was appeared to be higher than K₁. Based on survey data, BOD, Total nitrogen and Total Phosphrous calibration and verification result were in good agreement with measured value within mean coefficient variance(MSE) value, which were 6.0%, 3.4%, 13.6% and 6.3%, 9.0%, 16.3%, respectively. Sectional water quality predictions of the main stream of Pyongchang river are executed on the basis of the following cases 1) with sewage treatment of Pyongchang-eup 2) rain fall effect. As a result, BOD improvement rates of case 1) were appeared 10.6% in normal times, 25.6% in the dry season, and case 2) gave a serious impact on main stream. |