Regional landslide hazard maps of Tasmania

Colin Mazengarb, Mineral Resources Tasmania

Land stability is a significant problem in parts of Tasmania but useful information outlining the spatial and temporal distribution of this hazard is limited. To address this problem a methodology has been developed to record known areas of instability and predict areas where various landslide process could occur in the future. Specifically the project models rockfall, debris flows and deep-seated landslide processes utilising GIS technology. A comparison of known landslides to the predictive models is encouraging. Currently the approach is substantially deterministic, but probabilistic components are being developed that will eventually allow a regional risk assessment to be achieved. The talk will largely outline the technical methodology but will be expanded to discuss the successful partnerships between State and Local Government that have been achieved, and the challenge of effectively communicating complex geo-scientific hazard information to end-users.

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