the Bristol model of lahars on evolving topography.


Data Protection

Following recent introduction of General Data Protection Regulations, we have amended LaharFlow registration to include consent on personal data.

Existing users are required to accept the terms of use and review the LaharFlow personal data statement when logging in to LaharFlow.

User Interface

In response to feedback from users, we have redesigned the user interface, adding new features and functionality.

Sources are now editable. Flux sources and cap sources are added through a single "Set Sources" button.

The model inputs can be reset to the initial state through a "Reset model" button.

Model inputs can be saved and subsequently loaded from a "Load/save inputs" tab.

See the quick start guide for further details of new model interface.

Model outputs

A new data export option has been added. A kml file illustrating the first time of inundation can be downloaded from the "Data export" tab.

Topography upload

Advanced users are able to upload digital topographic map files. A change in the interface to make the use of topographic data more robust may mean that you will need to re-upload a topographic file to LaharFlow.

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...if you have already registered




LaharFlow is a tool for modelling the dynamics of lahars. The mathematical model is based on the shallow water equations and includes a description of bulking-up through the entrainment of solids eroded from the bed, deposition of the solid phase, and evolution of the topography. Read more....

For information about the LaharFlow web interface, see the quick start guide.


If you have any questions about the model or the web interface, please contact

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University of BristolSTREVA