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Laharz

April 8, 2014
Diagram showing association between dimensions of an idealized lahar and cross-sectional (A) and planimetric (B) areas calculated by Laharz_py for a hypothetical volcano. Laharz_py desktop software helps users plot areas of potential inundation by lahars, debris flows and rock avalanches, expanding the ability of communities to understand hazards and mitigate the effects of future volcanic eruptions. (Public domain.)

Laharz_py is a statistically based computer program capable of generating debris-flow and lahar hazard maps very rapidly, even in the absence of site-specific information other than topography. The software calculates a hazard zone on and around a volcano and estimates hazard zones downstream far from the volcano as areas of potential inundation. It is a python-language computer program built on a GIS platform (compatible with ArcGIS version 10 or later), and is based on statistical trends of worldwide data. The model has also been applied to and calibrated using real-world scenarios of non-volcanic debris flows and rock avalanches.