ONE year on from the major flood event in Hobart and surrounds in May last year, Glenorchy City Council has released the results of a CBD flood modelling study following months of research by global engineering consultancy SMEC Australia.
Council engaged the engineering experts to undertake a detailed flood study of the Glenorchy CBD and surrounding area in order to improve Council’s stormwater infrastructure and prepare residents for future flood events.
Glenorchy City Council senior civil engineer Patrick Marshall said the Glenorchy CBD and its surrounding areas were subject to flooding during high rainfall events.
“Major flooding has occurred in 1995, 1996, 2007, 2011 and, more recently, in May 2018,” he said.
“These events have caused significant loss and damage to Council’s infrastructure and also to private property.”
As a result of this study, SMEC has produced a Glenorchy CBD System Management Plan that includes a set of detailed flood risk inundation maps.
The flood maps will help Council to protect the safety of the public in future flood events, implement improved town planning controls to guide future development, and determine the minimum floor height for properties in flood prone areas to reduce the likelihood of flooding.
All councils in Tasmania are required by law to determine the land in their areas that has the potential to be most affected by flooding.
“While Glenorchy City Council recommends all properties in identified flood prone areas have adequate flood insurance, Council will also prioritise the upgrading of stormwater infrastructure in areas shown to have a higher risk of flooding,” Mr Marshall said.
“This will not prevent flooding, but may mitigate the impacts of it.”
The study considered a range of different scenarios, including the impact of a sea level rise and change in rainfall intensity caused by climate change.
Detailed flood risk maps for the Glenorchy CBD area will be available to be viewed at Council’s Chambers from 22 May to 19 June 2019, and can also be viewed on Council’s website at www.gcc.tas.gov.au/residents/living-in-glenorchy/flooding.aspx.
Council is currently working to update its Flood Early Warning System.
Caption: Flooding in May 2018 around Northgate Shopping Centre, Glenorchy.