Streamflow rating uncertainty: Characterisation and impacts on model calibration and performance
Residual heteroscedasticity for many streamflow gauging stations in Australia. Censoring extrapolated flows reduced model performance in regional calibration. Calibrating parameters against uncensored data fared better in prediction mode. Weighting on uncertain flows using a modified NSE improved calibration/prediction. Weighting on uncertain flows also reduced parameter uncertainty.
uncertainty modelling calibration heteroscedasticity ensemble stage-discharge rating curve nadaraya-watson