Bathymetry of Brisbane and Mary river

I am looking for the Bathymetry of two rivers which are the Brisbane and Mary river and if it is possible yours interland waterways.I have found one for all Australia... but the cell size is huge. I need 90m or less.

Do you know someone who I can contact? It could be one file .csv with X, Y and Depth so that I can processing in some software at QGIS or ArcGIS.

I want to use them in order to modelling at HEC HAS for my thesis at UNI. Thanks so much

thanks so much