# 2D Outer-Rise Hydration Using Poroelasticity The files are in the directory `examples/poroelastic-outerrise-2d`. The files and directories for this set of examples includes: :`README.md`: README file containing a brief description of the various examples. :`*.cfg`: PyLith parameter files. :`generate_gmsh.py`: Python script to generate mesh using Gmsh. :`*.msh`: Gmsh mesh files generated by Gmsh. :`*.spatialdb`: Spatial database filesFiles associated with the spatial databases. :`output`: Directory containing simulation output. It is created automatically when running the simulations. ## Overview This example examines how bending stresses and permeability structure influence the hydration state of a slab of oceanic lithosphere in the outer-rise of a subduction zone. The poroelastic slab is deformed based on bathymetry along a trench-orthogonal transect of the Central-American subduction system. Enhanced permeability is introduced in the outer-rise to simulate the effect of normal faulting. :Step 1: Underformed lithosphere with a uniform fluid-pressure applied to the top-boundary :Step 2: Lithosphere is deformed to the current bathymetry over 0.3 Myr. :Step 3: Lithosphere is deformed to the current bathymetry over 0.3 Myr with enhanced permeability from outer-rise faults. :::{figure-md} fig:example:poroelastic:outerrise:2d:overview Diagram of geometry for poroelastic-outerrise-2d. Diagram of geometry used for poroelastic-outerrise-2d. The domain extends from 0 km to +150 km in the x direction and from -30 km to 0 km in the y direction. We refer to the domain boundaries using the names shown in the diagram. ::: ## Example Workflow :::{toctree} meshing-gmsh.md common-information.md step01-no-faults-no-flexure.md step02-no-faults-flexure.md step03-faults-flexure.md exercises.md :::