Fema flood map zones update#

Where this lidar data is not available, we have used new and improved alternative terrain data so 85% of the population is now covered in some form by bare earth terrain data ( read more about the differences between terrain data in our blog). The updates have incorporated new high-resolution terrain data, including new lidar data now covering over 70% of the population. This year’s map updates have included new data availability from external partners, enabling us to represent the risk even more comprehensively.

We are committed to maintaining the latest science and methods in our data to enable the most effective flood risk assessment. Source: JBA Risk Management INCORPORATING THE LATEST DATA Flow paths are better defined in the 5m mapping, avoiding over representation of the risk. Image: 2021 flood map at 5m resolution (left) and previous flood map at 30m resolution (right) for Gold Coast. This enables improved representation of flow paths – especially crucial in densely populated urban areas with lots of infrastructure, to avoid over or underrepresentation of the risk. Mapping the hazard, therefore, requires high resolution methods to capture the risk most realistically.Īs a result, our specialists have remodelled fluvial (river) and pluvial (surface water) flooding at new 5m resolution for seven regions across the country, including the major urban areas of Adelaide, Brisbane, Cairns, Melbourne, Perth, and Sydney.

Fema flood map zones update#

2021 UPDATE NEW HIGH-RESOLUTION MODELLINGįlooding is an extremely localised peril – it can affect one property while a neighbouring property is spared. The new 5m remodelling ensures that 56% of the population and the most densely populated areas are now captured by the highest resolution mapping available.īelow, we discuss the new high resolution modelling latest terrain data bespoke hydrology updated defence information and validation against March 2021 floods used in our newly released mapping. JBA’s Australia Flood Map was the first to offer national coverage for all major flood types at 30m resolution, including modelling of all rivers across the country, with seven regions now available at 5m resolution. Martin Pullan, Attorney General’s Department, Government of South Australia

JBA’s Australia 30m and 5m flood risk data helps in the decision-making process of our planning applications and is currently being used to amend the ADG’s Flood Hazard Overlay Mapping and related Land Use Planning policy – helping us to identify areas of flood hazard to determine the best land use policies and mapping per area.īeyond this, JBA data is key to our wider efforts towards greater disaster preparedness and response in South Australia.

The Attorney-General’s Department of the Government of South Australia (ADG) is very pleased to be working with JBA. This includes Douglas County Council (Queensland) who use JBA’s maps to assess, prepare and mitigate flood risk for their residents, as well as the South Australian government. Our mapping is used by several local and state governments in Australia to help in flood risk management and planning. We’ve been the proud provider of flood maps for Australia since 2014 as part of our global mapping capability, empowering the re/insurance, financial, NGO, charitable and public sectors in flood risk management. JBA’s team of flood experts have recently updated JBA’s Australia Flood Map with new data, advanced methods, and the latest science, providing you with the most comprehensive insights for your flood risk assessment.