9.4 Runoff to surface water

Supporting information

The volume recognised in the water accounting statements (30,590,000 ML) represents the total volume of runoff into surface water within the Daly region during the 2011–12 year.

Quantification approach

Data source

MIKE 11 river hydraulic model.

Provided by

Department of Land Resource Management.


Runoff to surface water in the Daly region was estimated using a surface water model of the Daly River catchment developed using the MIKE 11 software by DHI.

The calibration of the MIKE 11 model involved adjusting the model parameters to ensure model outputs matched observed streamflow data in the region adequately. A detailed description of the model calibration process is provided in Knapton et al. (2010).

Assumptions, limitations, caveats and approximations

The runoff estimates were subject to the assumptions of the MIKE 11 model detailed by Knapton et al. (2010).

Uncertainty information

Derived from modelled data. The uncertainty estimate was not quantified.