NSW post-fire debris flow susceptibility map

Debris flows are extremely damaging and dangerous post-fire hazards that can cause significant short- and long-term impacts to rivers and aquatic ecosystems, water quality, and infrastructure. However, they are relatively poorly documented in NSW. High-resolution aerial imagery highlights significant debris flow activity in parts of NSW severely impacted by the 2019/20 Black Summer bushfires, specifically the Tuross, Tumut and Lake Burragorang catchments which were mapped in detail. This inventory of debris flow occurrences was used to train and validate a predictive logistic regression model using key predictor variables slope, fire severity, aridity, geology and soil erodibility. The model outputs can inform assessments of future potential hazards to threatened aquatic species, remote infrastructure such as roads and properties, and drinking water reservoirs and associated infrastructure. For more information, please read the accompanying report, ‘Post-fire debris flows in NSW: Susceptibility modelling and implications for management’. The report will be available soon.

Organisation: NSW Department of Climate Change, Energy, the Environment and Water

Ensuring a sustainable NSW through climate change and energy action, water management, environment and heritage conservation and protection. Read more

Data and Resources

Additional Info

Metadata template type Raster
Asset Type Dataset
Edition 1
Purpose Post-fire management planning
Update Frequency As needed
OEH Service Landscapes and Aquatic Ecosystems
Keywords HAZARDS-Fire,SOIL-Erosion,WATER-Quality
Field of Research (optional) Post-fire debris flow modelling
Geospatial Topic Environment
Geospatial Coverage

Dataset extent

Temporal Coverage From 2021-03-01
Datum GDA94 / NSW Lambert
Licence Creative Commons Attribution
Landing page https://www.planningportal.nsw.gov.au/opendata/dataset/nsw-post-fire-debris-flow-susceptibility-map
Legal Disclaimer Read
Attribution NSW Department of Climate Change, Energy, the Environment and Water asserts the right to be attributed as author of the original material in the following manner: "© State Government of NSW and NSW Department of Climate Change, Energy, the Environment and Water 2024"