GeoClaw

See www.geoclaw.org for more overview of the GeoClaw software and links to references and uses.

Warning

As with all of Clawpack, this code is provided as a research and teaching tool with no guarantee of suitability for any particular purpose, and no liability on the part of the authors. See the License for more details and Cautionary Hints on using GeoClaw for tips on exercising appropriate care in using the code.

The $CLAW/geoclaw directory contains a specialized version of some Clawpack and AMRClaw routines that have been modified to work well for certain geophysical flow problems.

Currently the focus is on 2d depth-averaged shallow water equations for flow over varying topography. The term bathymetry is often used for underwater topography (sea floor or lake bottom), but in this documentation and in the code the term topography is often used to refer to either.

A primary concern with such flows is handling the margins of the flow where the depth goes to 0, for example at the shore line. In GeoClaw this is handled by letting the depth variable h in the shallow water equations be 0 in some cells. Robust Riemann solvers are used that allow for dry cells adjacent to wet cells and that allow wetting and drying, for example as a tsunami inundates dry land.

Some sample calculations can be viewed in the Gallery of GeoClaw applications. More will eventually appear in the Clawpack Applications repository.

• Getting started with GeoClaw
  • Running a GeoClaw code
  • Topography
  • Plotting GeoClaw results
  • Setting up a new example
• Cautionary Hints on using GeoClaw
  • Tsunami hazard modeling
• Topography data
  • Downloading topography files
  • Topography displacement files
  • qinit data file
• Python tools for working with topo and dtopo
  • topotools module for working with topography data
  • dtopotools module for moving topography
  • geoclaw.util module of utility functions
  • kmltools module of utility functions
• GeoClaw topotools examples
  • Contents
  • Fetching a topo file from the web
  • Reading a topo file
  • Plotting topography data
  • Cropping topography
  • Unstructured Topography
• GeoClaw dtopotools examples
  • Contents
  • Reading a csv file specifying the subfaults
  • Read in an existing dtopo file:
  • Create a fault using the NOAA SIFT database directly
  • Time-dependent fault rupture
• Specifying GeoClaw parameters in setrun.py
  • Additional AMR parameters
  • General geo parameters
  • Topography data file parameters
  • qinit data file parameters
  • AMR refinement region parameters
  • Fixed grid output parameters
  • Fixed grid maximum monitoring / arrival times
• Plotting routines for GeoClaw
• Visualizing GeoClaw results in Google Earth
  • Basic requirements
  • An example : The Chile 2010 tsunami event
  • Plotting tips
• Quick start guide for tsunami modeling
• Earthquake sources: Fault slip and the Okada model
  • Fault slip
  • Okada model
• Setting sealevel
• Manning friction term
• Fixed grid output
• Fixed grid monitoring
  • Input file specification
  • Tools to create a input file
  • Values to monitor
  • Choice of interpolation procedure
  • Processing and plotting fgmax output
  • Format of the output files
• Some sources of tsunami data
  • Topography / bathymetry
  • Earthquake source models
  • DART buoy data
  • Tide gauges
• The Okada model for computing seafloor deformation
  • Contents
  • Introduction
  • Examples
  • Varying the strike
  • Varying the dip
  • Varying the rake
  • Varying the depth

• Links to relevant papers and sample codes (some are based on the Clawpack 4.x version of GeoClaw).