Parameter estimation and uncertainty analysis for a watershed model
Environmental Modelling & Software
An open software environment for hydrological model assessment and development
Environmental Modelling & Software
An integrated modelling framework for regulated river systems
Environmental Modelling & Software
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Predicted climate change impact on future water availability in the Murray-Darling Basin (MDB) has highlighted the need for a whole of basin model that incorporates various physical and management characteristics for planning and operational purposes. Modelling platforms such as eWater Source Integrated Modelling System (Source) offer a useful framework in this regard, but at present lack automated calibration techniques to parameterise river system models. This paper presents an automated river system calibration procedure which is robust, repeatable, transparent and systematic. The procedure allows for river network calibration (as opposed to isolated reach by reach calibration), since this has more utility for basin planning and prediction. The calibration procedure routs upstream flow, estimates ungauged inputs via rainfall-runoff (RR) models, and estimates flow based split (distributary) functions and loss functions in complex river systems. This procedure was tested in the Northern Murray-Darling Basin (MDB) and results from the Border Rivers catchment are presented. The results from the Border Rivers case study demonstrate the applicability of the procedure with median calibration and evaluation NSE values of 0.88 and 0.79, respectively. The use of this procedure in the Border Rivers region has highlighted the likelihood of changing stream channel connections at higher flows in the lower reaches of the river network.