School of Civil Engineering

Mentor: Badin Gibbes & Alistair Grinham

Project Team: Fanar Al Qassab, Nicholas Hutley, Robert Bowd and Urvisha Kiri

Project Brief

This project forms part of a larger project currently underway with Seqwater to investigate the natural capacity of the Mid-Brisbane River to improve the quality of water released from Wivenhoe Dam before it is treated to a drinking water standard. A combination of field measurements of flow and water quality will be used to assess the current state of the system. Numerical models of river flow and water quality are also being developed to better understand the dynamics of the system. Students will gain experience with a range of environmental sampling, monitoring and data processing techniques as well as industry-standard modelling packages. This project will assist in developing knowledge and skills useful for a range of undergraduate civil engineering course including CIVL2130, CIVL3141 and CIVL4140.

Project Report

The 3D numerical model portion of the project is progressing well with simulations of a number of flow regimes. The purpose of the model is to determine reasonably accurate travel times under different flow conditions for spills upstream with relation to the drinking water treatment plants downstream. Non-reactive contaminant transport has been woven into the model with the simulation results providing information for the amount of time that a contaminant spilt in the Mid-Brisbane River might take to reach the Mt. Crosby water treatment plant under different conditions. Analysis and further calibration and validation of the numerical model is to follow this semester in conjunction with the results from additional sampling, tracer studies and subsequent water quality testing results being used to inform this calibration.

Tasks for future work:

  • Water sampling of the mid Brisbane River, with subsequent analysis of the water quality results is to be continued this semester.
  • Calibration and validation of the 3D numerical model created in Semester 1 2016
  • Possible expansion of the current model to include other catchment systems to simulate large scale flood events.