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http://dx.doi.org/10.15681/KSWE.2015.31.5.507

Development of a Hybrid Watershed Model STREAM: Test Application of the Model  

Cho, Hong-Lae (Watershed Environment Research Unit, HydroCore Ltd.)
Jeong, Euisang (Watershed Environment Research Unit, HydroCore Ltd.)
Koo, Bhon Kyoung (Watershed Environment Research Unit, HydroCore Ltd.)
Publication Information
Journal of Korean Society on Water Environment / v.31, no.5, 2015 , pp. 507-522 More about this Journal
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 $R^2$ 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.
Keywords
Calibration; Hybrid watershed model; Nonpoint source pollution; Sensitivity analysis; Validation; Verification;
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