| Title |
Development of a Hybrid Watershed Model STREAM: Test Application of the Model |
| Authors |
조홍래 ( Honglae Cho ) ; 정의상 ( Euisang Jeong ) ; 구본경 ( Bhonkyoung Koo ) |
| DOI |
https://doi.org/10.15681/KSWE.2015.31.5.507 |
| Keywords |
Calibration; Hybrid watershed model; Nonpoint source pollution; Sensitivity analysis; Validation; Verification |
| Abstract |
In this study, some of the model verification results of STREAM (Spatio-Temporal River-basin Ecohydrology Analysis Model), a newly-developed hybrid watershed model, are presented for the runoff processes of nonpoint source pollution. For verification study of STREAM, the model was applied to a test watershed and a sensitivity analysis was also carried out for selected parameters. STREAM was applied to the Mankyung River Watershed to review the applicability of the model in the course of model calibration and validation against the stream flow discharge, suspended sediment discharge and some water quality items (TOC, TN, TP) measured at the watershed outlet. The model setup, simulation and data I/O modules worked as designed and both of the calibration and validation results showed good agreement between the simulated and the measured data sets: NSE over 0.7 and R2 greater than 0.8. The simulation results also include the spatial distribution of runoff processes and watershed mass balance at the watershed scale. Additionally, the irrigation process of the model was examined in detail at reservoirs and paddy fields. |