Performances of rainfall-runoff models calibrated over single and continuous storm flow events
Data(s) |
01/01/2008
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Resumo |
Accurate parameter estimation is important for reliable rainfall-runoff modeling. Previous studies emphasize that a sufficient length of continuous events is required for model calibration to overcome the effect of initial conditions. This paper investigates the feasibility of calibrating rainfall-runoff models over a number of limited storm flow events. For a subcatchment having a moderate influence from initial soil moisture conditions, this study shows that rainfall-runoff models could still be calibrated reliably over a set of representative events provided that the events cover a wide range of peak flow, total runoff volume, and initial soil moisture conditions. This approach could provide an alternative calibration strategy for a small watershed that has a limited data length but consists of runoff events with a wide range of magnitudes. Compared to continuous-event calibration, event-based calibration appears to perform better in simulating the overall shape of hydrograph, peak flow and time to peak. However, continuous-event calibration was found to be more reliable in providing runoff volume, suggesting that continuous-event calibration should still be used when runoff volume is the main concern of a study. |
Identificador | |
Idioma(s) |
eng |
Publicador |
American Society of Civil Engineers |
Relação |
http://dro.deakin.edu.au/eserv/DU:30063752/chua-performances-2008.pdf http://dx.doi.org/10.1061/(ASCE)1084-0699(2008)13:7(597) |
Direitos |
2008, American Society of Civil Engineers |
Palavras-Chave | #rainfall #runoff #calibration #peak flow #parameters |
Tipo |
Journal Article |