| Title |
Determination of the Optimal Sediment Discharge Formula for Hyeongsan River Using GSTARS |
| Authors |
안정민(Ahn, Jung Min) ; 류시완(Lyu, Siwan) ; 이남주(Lee, Nam Joo) |
| DOI |
https://doi.org/10.12652/Ksce.2012.32.1B.001 |
| Keywords |
최적 유사량공식;형산강;장기하상변동 optimal sediment formula;hyeongsan river;GSTARS;long-term bed change |
| Abstract |
Quasi-two dimensional numerical model (GSTARS) was applied to determine the optimal sediment discharge formula for simulating the sedimentologic characteristics of Hyeongsan river. The field measurements have been conducted to obtain the data, such as sediment discharge, bed material, and channel geometry, for model calibration and verification. The sediment discharge formulas, which have been generally used, have been assessed according to the average error, relative error, RMSE, RRMSE, discrepancy ratio and Nash-Sutcliffe efficiency coefficient for bed changes along the thalweg. From the results, Laursen formula(1958) shows the best performance to simulate the long-term bed change of Hyeongsan river. |