Sensitivity analysis of key parameters of hydrological model METQ 2007BDOPT
2024
Bakute, Anda | Grīnfelde, Inga | Pilecka-Uļčugačeva, Jovita
Hydrological modelling is essential for understanding water flow and distribution, especially in regions with limited direct measurements. The METQ 2007BDOPT model, a conceptual tool widely used to simulate daily discharge, depends on accurate calibration of key parameters. This study focused on the Brook Vienziemīte basin to evaluate parameter sensitivity and propose refinements to improve the model’s predictive reliability. Daily hydrological and meteorological data from 1994 to 2004 were used to perform sensitivity analysis and calibrate the model for optimal performance. Key findings indicate that parameters such as beta, dz, and C melt significantly influence discharge predictions, particularly during peak flow events, with beta showing a 149% increase in peak discharge under a +50% adjustment. Parameters like P z and D perc were found crucial for maintaining baseflow conditions. The results underscore the importance of targeted parameter calibration for improving model accuracy and reliability, particularly in capturing extreme hydrological events. These insights are vital for enhancing flood forecasting and climate impact assessments in similar basins.
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Издатель LBTU Faculty of Forest and Environmental Sciences
