The Little Creek catchment is located north of the M4 Motorway and drains to South Creek with the study area covering parts of the suburbs of Oxley Park, Colyton, St Marys and North St Marys. The catchment includes crossings of the Great Western Highway and the Main Western railway line and covers an area of approximately 480 hectares. The primary objective of this Flood Study is to define design flood behaviour for a wide range of design flood probabilities. Other objectives/components are to:

• collate available historical flood related data;
• collect detail survey of stormwater infrastructure;
• undertake a community consultation program;
• prepare suitable models for use in a subsequent Floodplain Risk Management Study;
• validate the models against historical events;
• undertake sensitivity of the model results to modelling parameters and assumptions;
• provide design flood levels, depths, velocities, flows and flood extents;
• assess the capacity of the existing drainage network and identify potential upgrades;
• assess the sensitivity to potential climate change effects; and
• assess floodplain planning categories and undertake provisional hazard mapping.