GRFIN Helper

July 7, 2025

Example of GRFIN Inundation Output

The GRFIN yaml generator is a simple python program which creates a yaml file for the USGS GRFIN software to read for inundation modelling using a DEM. The GRFIN yaml generater was created for the CGS for their work in creating county-wide debris flow hazard maps. The GRFIN tool takes over the modelling task of the legacy Laharz model. Using a computationally simple empircal (data-driven) model, GRFIN allows for efficient GRowth, Flow, and INunudation modelling. Find the latest release of GRFIN here. Find the GRFIN-helper tool on the CGS github here.

(1) Reid, M.E., Brien, D.L., Cronkite-Ratcliff, C., and Perkins, J.P., 2025, Grfin Tools—User guide and methods for modeling landslide runout and debris-flow growth and inundation: U.S. Geological Survey Techniques and Methods, book 14, chap. A3, 105 p., https://doi.org/10.3133/tm14A3.

(2) Cronkite-Ratcliff, C., Reid, M.E., Brien, D.L., Perkins, J.P., 2025, Grfin Tools—Software package and runtime documentation for users: U.S. Geological Survey software release, https://doi.org/10.5066/P9NVKFE2