The GeoClaw software for depth-averaged flows with adaptive refinement

Many geophysical flow or wave propagation problems can be modeled with two-dimensional depth-averaged equations, of which the shallow water equations are the simplest example. We describe the GeoClaw software that has been designed to solve problems of this nature, consisting of open source Fortran programs together with Python tools for the user interface and flow visualization. This software uses high-resolution shock-capturing finite volume methods on logically rectangular grids, including latitude–longitude grids on the sphere. Dry states are handled automatically to model inundation. The code incorporates adaptive mesh refinement to allow the efficient solution of large-scale geophysical problems. Examples are given illustrating its use for modeling tsunamis and dam-break flooding problems. Documentation and download information is available at www.clawpack.org/geoclaw.

► We describe the GeoClaw software for two-dimensional depth-averaged equations for geophysical flow problems. ► GeoClaw uses high-resolution shock-capturing finite volume methods and adaptive mesh refinement. ► GeoClaw consists of open source Fortran programs and Python tools for the user interface and visualization. ► We show examples of modeling tsunamis and dam-break flooding with GeoClaw.