Last Updated July 17, 2017

Formulation

Soil Properties

The hydraulic conductivity of the soil is a function of the negative pore-water pressure in the unsaturated regions. The rate of change in water content is dependent on the pore-water pressure during transient processes. Hydraulic conductivity can be defined as anisotropic in two orthogonal directions.

Iterative Process

The nonlinear nature of the finite element equations is handled using an efficient radial search iterative scheme. Graphing tools are available at run-time to help you judge if convergence has been achieved. This has proved to be extremely useful in solving highly nonlinear flow systems.

Flux Quantities

SEEP/W computes the total flux across single or multiple lines drawn through the mesh.

Features

  • Boundary condition types include total head, pressure head, or flux specified as a constant or a function of time; pressure head; transient flux as a function of computed head; review and adjustment of seepage face conditions.
  • Volumetric water content and conductivity functions can be estimated from basic parameters and grain-size functions.
  • Adaptive time stepping to ensure the use of optimal time steps in transient analyses with sudden changes in boundary conditions.
  • Flow path deliniation.
  • And many more!

Integration with Other Applications

Dissipate excess pore-water pressures generated by SIGMA/W or QUAKE/W

Excess pore-water pressures generated by static loading (e.g., fill placement) or by dynamic motion during an earthquake can be brought into SEEP/W to study how long it takes to dissipate the excess pressures.

Use SEEP/W pore-water pressures in SLOPE/W

Using finite element computed pore-water pressures in SLOPE/W makes it possible to deal with highly irregular saturated/unsaturated conditions or transient pore-water pressure conditions in a stability analysis. For example, you can analyze changes in stability as the pore-water pressure changes with time.

Use SEEP/W data inside a CTRAN/W model for contaminant transport, or a TEMP/W model for convective heat transfer analysis.

Engineering Methodology Book

The included SEEP/W engineering methodology book discusses the whys and hows of modeling, as well as the theory and formulations behind the SEEP/W product. Seepage Modeling with SEEP/W is a full-length book about proper modeling techniques: how to think before, during and after setting up and solving a model. The book includes chapters devoted to:
  • Numerical Modeling: What, Why and How
  • Geometry and Meshing
  • Material Models and Properties
  • Bounday Conditions
  • Analysis Types
  • Functions in GeoStudio
  • Numerical Issues
  • Simulation of Flow Nets
  • Visualization of Results
  • Modeling Tips and Tricks
  • Illustrative Examples
  • Theory