Flow data

Note that in the early stages of this investigation reliance was placed on Koree Island flow data provided by Port Macquarie and Hastings Council, data they are required to gather so to effectively provide environmental flows (EF) and to inform their own EF investigations.  The Council's last revision of the  flow rating curve for the site was in late 2015 and so data gathered subsequently, particularly after a major flood that occurred in March 2017, has questionable reliability due to possible channel-form changes. Accordingly,  additional reliance has been placed on flow data gathered further upstream at the Ellenborough gauging site. It is recognised that this data too has dubious reliability for understanding flow conditions in the lower river as  approximately 500 square kilometers of catchment is present between the Ellenborough gauging site and Koree Island near the tidal limit.