| Title |
Multidimensional Hydrodynamic and Water Temperature Modeling of Han River System |
| Authors |
김은정 ( Eun Jung Kim ) ; 박석순 ( Seok Soon Park ) |
| Keywords |
Han River system; Integrated river and lake modeling system; Integrated water quality management; Multidimensional dynamic modeling |
| Abstract |
Han River is a complex water system consisting of many lakes. The water quality of Lake Paldang is significantly affected by incoming flows, which are the South and North branches of the Han River, and the Kyungsan Stream. In order to manage the water quality of the Lake Paldang, we should consider the entire water body where the incoming flows are included. The objectives of this study are to develop an integrated river and lake modeling system for Han River system using a multidimensional dynamic model and evaluate the model`s performance against field measurement data. The integrated model was calibrated and verified using field measurement data obtained in 2007 and 2008. The model showed satisfactory performance in predicting temporal variations of water level, flow rate and temperature. The Root Mean Square Error (RMSE) for water temperature simulation were 0.88~2.13˚C (calibration period) and 1.05~2.00˚C (verification period) respectively. And Nash-Sutcliffe Efficiency (NSE) for water temperature simulation were 0.89~0.98 (calibration period) and 0.90~0.98 (verification period). Utilizing the validated model, we analyzed the spatial and temporal distributions of temperature within Han River system. The variations of temperature along the river reaches and vertical thermal profiles for each lakes were effectively simulated with developed model. The suggested modeling system can be effectively used for integrated water quality management of water system consisting of many rivers and lakes. |