Georges River Flood Data

Brief description

This report details the flood gauging operations undertaken
from 1700 hrs on March 21st, 1983 to 0200 hrs on March 22nd,
1983 and presents previous flood data collected on the
Georges River.

The Georges River has a total catchment area of
approximately 650 square kilometres and flows into the
south-western corner of Botany Bay about 15km south of
Sydney. The tidal influence under low freshwater discharge
conditions extends approximately 40km upstream and
terminates at Liverpool Weir.

Flood monitoring at selected sites as defined in Figure 1 is
undertaken for floods in excess of a one in ten year
frequency. Flood monitoring is commenced on receipt of
Confidential/Preliminary Flood Warning advice when it is
predicted that a stage level of 2.0 meters at the Liverpool
Weir gauge (approximately 4.7m AHD) will be exceeded.

The collection of this flood data has in the past and will
in the future be used to calibrate physical modeIs which are
constructed at the PWD Manly Hydraulics Laboratory and
U.N.S.W. Water Research Laboratory.

The current metering- lines, flood gauge location and
automatic recorder locations are as follows:

i) Current metering/flood level observations:

1. East Hills Footbridge
2. Milperra Road Bridge
3. Rabaul Road (gauge readings only)
4. Lansdowne Bridge - Prospect Creek
5. Irelands Bridge - Cabramatta Creek
6. Mountbatten Bridge - Warwick Farm

ii) Automatic recorders are located:

1. Milperra Bridge (see note below)
2. Lansdowne Bridge
3. Cutler Road, Lansvale
4. Scrivener Street, Warwick Farm
5. Liverpool weir (upstream)

Note on Milperra - The Milperra automatic recorder is located
immediately upstream of the road bridge. It
consisted of two measurement points, however only
the downstream one was operating at the time of
the monitoring. The recorder has since been modified and now has only one measurement point.

Full description

Georges River Flood Data