High impact overland flow is almost certain to occur during a single lifetime of 70 years. Overland flow impact is broken down into three categories: high, medium and low. The Flood Awareness Map uses the term impact to describe the severity of potential overland flow flood events. Overland flow can be fast-moving and unpredictable, with varying depths and extents. Although these are not as likely as high or medium likelihood flood events, they may still occur.Īll modelled flood events should be taken seriously, and steps taken to prepare. Find out more information about how to prepare for flooding on Council’s website. Medium likelihood describes the type of flood likely to occur during a single lifetime. There is a 1 in 100 chance or a 1% possibility for a flood of this size to happen in any year.Ĭouncil also maps rare and very rare flood events, which are shown as low and very low likelihoods. Search ‘Be Prepared’ on Council’s website for tips and advice. Residents and businesses are strongly advised to prepare for flooding, to minimise the impact on their homes, business and family. There is a 1 in 20 chance or a 5% possibility for a flood of this size to occur in any year. High likelihood describes a type of flood that is almost certain to occur during a single lifetime, possibly more than once. The Flood Awareness Map uses the term likelihood to describe the possibility of flooding from rivers, creeks and storm tides happening annually.įlood likelihood is broken down into four categories: high, medium, low and very low. Each category of flood likelihood is shown as a different shade of colour on the Flood Awareness Map. Steps should be taken to plan and prepare to minimise flooding impacts on your home, business and family. Residents and businesses must consider how flooding may affect their property and neighbourhood. >Female voice: Brisbane City Council’s Flood Awareness Map is an interactive online tool to help residents understand the risk of flooding on a property.Ĭouncil uses the terms likelihood and impact to explain the chances of flooding from one or more sources. This video is 3 minutes and 13 seconds long. This is a video transcript of the Understanding flood likelihood and impact video hosted on Brisbane City Council's YouTube channel.
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