The Coastal Cooperative Research Centre (CRC), in conjunction with the South East Queensland Regional Water Quality Management Strategy, has undertaken a study of the Brisbane River’s turbidity. The author of this report has chosen to focus on one tributary of the Brisbane River, Oxley Creek, as a starting point for the eventual simulation of a total catchment water quality model. This project aims at:
1. Assessing Oxley Creek and identifying what information is needed to create a simulation of the sediment transport and water quality.
2. Creating a simple model in MATLAB as a framework for modelling the overall Brisbane River system by focusing on a simulation of Oxley Creek.
Eventually this may be developed, through further work, to create a user-friendly model for use by students and the general public, as well as for simulations to assist management plans of the river.
This report focuses on the scope of the first aim, assessing Oxley Creek and identifying what information is required to create a water quality model. A literature survey of past research on water quality models has identified two types often used for onedimensional simulations. These have been discussed along with the governing equations for such a model. Research has also gone into locating existing data for Oxley Creek for both hydrodynamic and water quality parameters. A significant amount of data in both areas has been collected through the Brisbane City Council (BCC) and the Environmental Protection Agency (EPA) for which permission has been given to use in this project.
Analysis of the Oxley Creek Catchment has been included in order to identify the impacts on the creek and the parameters that need to be considered for the simulation. The possible pollutants affecting the creek and the major impacts imposed by urban, industrial, commercial and rural land uses are investigated.