Outfall Fate Modelling in Raglan, New Zealand
A high resolution, dedicated tidal model was developed in order to simulate outfall dispersion.
A high resolution, dedicated tidal model was developed in order to simulate outfall dispersion. Simulations were run to highlight the differences of downstream effluent fate between licensed release strategies and those employed during storms and high traffic holiday seasons at Raglan.
The results show that if the official discharge guidelines are adhered to (i.e. on the outgoing tide), very little of the effluent remains in the harbour. However, if discharge continues into the flood phase of the tide, sewage effluent can be widely dispersed throughout the harbour.
