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Line 26: A series of north-south oriented (10, 15 and 30m resolution) fixed grid domains were developed over the region of interest. When conceptualising the model domain, a fully 2D solution is preferable over a 1D/2D linked representation provided the 2D resolution of the primary flowpath/s is sufficiently fine. 'Sufficiently fine' is somewhat loosey defined as representing the channel with at minimum 4 fixed grid cells ~~perpendicular to the direction of flow~~. Here, the 30m fixed grid resolution was determined sufficiently detailed to represent the river bathymetry. For this model the upper sections near the two inflows are not represented well, especially the northern Tributary Inflow. However, this is unlikely to have an adverse effect on the objectives of the modelling, but would affect the comparison to the high water marks near these inflows.

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