Flood Management Studies

Flood Futures
Council is having an ongoing conversation with the community about our future as a community on a floodplain, and you can take part at www.wagga.nsw.gov.au/FloodFutures

Since early white settlement the Murrumbidgee River has flooded on a number of occasions causing flood damage and inconvenience to the development in the flood plains.

Wagga Wagga City Council has undertaken a number of studies into the flooding of the Murrumbidgee River, and how to manage the risk it poses to the City. These are accessible below. Council has also prepared modelling for a variety of flood scenarios.

History of Floods in Wagga

Since the first rural settlement in the early 1840s there have been 77 floods of over 8.23m. Official records of River heights since 1891 read at the Hampden Bridge gauge are available and estimated records are available of rivers over 8.23m since 1844. Flooding of the City area in the south flood plain was frequent and to a lesser extent flooding occurred in the North Wagga Wagga village.

There have been years of frequent floods, i.e. in one year 1974 Wagga Wagga had five floods all over 8.92 m and there was severe flooding in the 1950 to 1956 period. In other long periods 1939 to 1949 and 1960 to 1970 no floods occurred. Significant floods have occurred in Wagga Wagga in 1852, 1853, 1870, 1891, 1925, 1950, 1952, 1974, 1991 and 2012 with the largest recorded flood of 10.97 metres occurring in 1844. There have been two floods greater than the 1974 flood. You can view a complete list of flood years and heights here.

2018 Wagga Wagga Revised Murrumbidgee River Floodplain Risk Management Study and Plan 2018

Wagga Wagga Revised Murrumbidgee River Floodplain Risk Management Study and Plan - Volume 1

Wagga Wagga Revised Murrumbidgee River Floodplain Risk Management Study and Plan - Figures and Appendices below

Figure 1Study Area
Figure 2Key locations and floodplain communities
Figure 3Wagga Wagga City Council LEP - 2010
Figure 4Wagga Wagga 0.5EY Design Flood Depths and Extent
Figure 5Wagga 10% AEP Design Flood Depths and Extent
Figure 6Wagga 5% AEP Design Flood Depths and Extent
Figure 7Wagga 2% AEP Design Flood Depths and Extent
Figure 8Wagga 1% AEP Design Flood Depths and Extent
Figure 9Wagga 0.5% AEP Design Flood Depths and Extent
Figure 10Wagga 0.2% AEP Design Flood Depths and Extent
Figure 11Wagga PMF Design Flood Depths and Extent
Figure 12Hydraulic Categorisation - 1% AEP Event
Figure 13Hydraulic Categorisation - 5% AEP Event
Figure 14Hydraulic Hazard - 1% AEP Event
Figure 15Hydraulic Hazard - 5% AEP Event
Figure 16Emergency Response Planning Classification - 1% AEP Event
Figure 17Emergency Response Planning Classification - PMF Event                                        
Figure 18Flood Planning Area - Post Levee Upgrade
Appendix A Glossary
Appendix BInitial Community Consultation (August / Sept 2016)
Appendix CFlood Damages Assessment
Appendix DHydraulic Categorisation - Floodway Definition
Appendix EManagement Options Mapping
Appendix FManagement Options Details and Costings
Appendix GFuture Flood Risk Management
Appendix HVegetation Management Plan
Appendix ISES Flood Intelligence Draft Updates
Appendix JEmergency Management Considerations for raising North Wagga Levee
Appendix KDecember 2010 and March 2012 Flood Warnings and Evacuation Warnings / Orders for Wagga Wagga
Appendix LAlternate North Wagga Evacuation Route
Appendix MResponses to Public Exhibition Submissions

2014 Wagga Wagga Detailed Flood Model Revision - Final Report August 2014

2012 Wagga Wagga Local Government Area Flood Study - Final Report January 2012

2011 Wagga Wagga Major Overland Flow Flood Study (MOFFS) - Final Report August 2011

2011 Oura to Braehour Flood Model Extension

2010 Murrumbidgee River Model Conversion Project

2009 Floodplain Risk Management Plan documentation

2009 Floodplain Risk Management Study documentation

2004 Flood Study documentation