The Lansdowne study area is located in south west Sydney and consists of part of the Lansdowne suburb and parts of the Georges Hall and Bass Hill suburbs. The study area is approximately 242 hectares. The southern and eastern extents of the catchment are predominantly urban residential with much of the western part of the catchment consisting of bushland and forming part of the Lansdowne and Mirambeena Regional Parks. Low-lying areas and ponds are located along the western boundary of the catchment, between Prospect Creek and Henry Lawson Drive. The study area is located in the north western part of the Bankstown City Local Government Area.
The purpose of the study is to define flood behaviour throughout the Lansdowne stormwater catchment, including the analysis of flows within the underground pipe drainage network and surface runoff across the catchment. The main outcomes from the study include:
- A database of all Council drainage assets within the study area;
- Establishment of a computer model capable of assessing flood behaviour;
- Information on flood behaviour under existing catchment conditions;
- Information on potential constraints in the drainage assets for various storm events;
- A property database including surveyed floor levels, flood levels and the resulting floor level immunity, expressed in the magnitude of a storm event;
- Predicted change in flood levels due to the potential impacts of climate change; and
- A model that can be used to assess flood mitigation options and future development proposals.
