Narellan Creek Overland Flood Study (Vol 1) - Flipbook - Page 75
Narellan Creek Catchment
Flood Study
Reducing the storm loss (reflecting a wetter catchment) is predicted to generate very small
increases in peak design discharges at most locations. Peak discharges are predicted to
increase by an average of 1%, although localised increases of more than 10% are predicted
at a small number of locations.
Overall, the peak discharges do not appear to be particularly sensitive to the adopted storm
losses.
The revised discharge hydrographs were then applied to the TUFLOW model and the
TUFLOW model was used to re-simulate the 5% AEP, 1% and 0.5% AEP flood with the
modified storm losses. Peak water levels were extracted from the results of the modelling
and were compared against peak flood levels for
