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SEEP/W
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Index
1. Overview
2. Easy
to Use
3. Integration
4. Typical
Applications
5. Features
6. Formulation
7. Engineering
Methodology Book
8. Student
Edition
9. Basic Edition
10. System Requirements
11. In the
Box
Overview
 SEEP/W is a finite element software
product for analyzing groundwater seepage and excess pore-water
pressure dissipation problems within porous materials such
as soil and rock. Its comprehensive formulation allows you
to consider analyses ranging from simple, saturated steady-state
problems to sophisticated, saturated-unsaturated time-dependent
problems. You can apply SEEP/W to the analysis and design
of geotechnical, civil, hydrogeological, and mining engineering
projects.
SEEP/W can model both saturated and unsaturated flow, a
feature that greatly broadens the range of problems that
can be analyzed. In addition to traditional steady-state
saturated flow analysis, the saturated/unsaturated formulation
of SEEP/W makes it possible to analyze seepage as a function
of time and to consider such processes as the infiltration
of precipitation. The transient feature allows you to analyze
such problems as the migration of a wetting front and the
dissipation of excess pore-water pressure.
SEEP/W
is integrated in GeoStudio 2004
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 Easy to Use Defining
a Seepage Model
The unique CAD-like technology in SEEP/W allows you to generate
your finite element mesh by drawing regions on the screen.
You can then interactively apply boundary conditions and specify
material properties. You can even estimate the material property
functions from easily measured parameters like grain-size,
saturated conductivity, saturated water content, and the air-entry
value. If you make a mistake, you can correct it using the
Undo command.
Viewing the Analysis Results
Once you have solved your seepage problem, SEEP/W offers many
tools for viewing results. Generate contours or x-y plots
of any computed parameter, such as head, pressure, gradient,
velocity, and conductivity. Velocity vectors show flow direction
and rate. Transient conditions can be shown as the changing
water table position over time. Interactively query computed
values by clicking on any node, Gauss region, or flux section.
Then export results into other applications, such as Microsoft
Excel or Word, for further analysis or to prepare presentations.
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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.
Click
for a complete  Product Integration Chart
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SEEP/W 2007 is part of GeoStudio 2007, an integrated tool
containing GEO-SLOPE's leading suite of geotechnical modeling
software products: SLOPE/W, SEEP/W, SIGMA/W, QUAKE/W, TEMP/W,
CTRAN/W, AIR/W and VADOSE/W. Using GeoStudio means you can
run all of these products in one environment, creating one
model definition that is shared among all products.
For example, when you create your geometry and material
properties in one product, they are available immediately
in all other products. Your model is stored in one definition
file, which is based on the industry-standard XML format.
Sharing the data lets you run many analyses on the same
problem. You can use the results from one analysis in another,
or import files created by previous versions of the software.
Typical Applications
SEEP/W
can model almost any groundwater problem, including:
- Dissipation
of excess pore pressure after reservoir drawdown
- Changes
in pore-water pressure conditions within earth slopes
due to infiltration of precipitation
- Mounding
of the groundwater table beneath water retention structures
such as lagoons and tailings ponds
- Effect
of subsurface drains and injection wells
- Drawdown
of a water table due to pumping from an aquifer
- Seepage
flow quantities into excavations
- Use
AIR/W and consider the true matric suction (Ua-Uw) mechanisms
- Integrate
with TEMP/W and consider flow in freezing and thawing
soils
- plus
many more!
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Features
- Analysis
types include steady-state confined and unconfined flow,
transient flow, 2-D flow in a cross-section or in plan
view, and 3D axisymmetric flow.
- 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!
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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 during 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.
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Engineering Methodology Book
When you purchase a SEEP/W 2007 license you also receive a
copy of the SEEP/W Engineering Methodology book, Seepage
Modeling with SEEP/W 2007. This book is not a software
manual but a full-length book that discusses why and how to
model. It does not describe how to use the commands in the
software or which buttons to click - that is provided in detail
in the Online Help. Instead it is about thinking: how to think
before, during and after setting up and solving a model. The
Engineering Methodology book has chapters devoted to:
- Introduction
- Numerical
Modeling: What, Why and How
- Meshing
- Material
Properties
- Boundary
Conditions
- Analysis
Types
- Numerical
Issues
- Simulation
of Flow Nets
- Visualization
of Results
- Modeling
Tips and Tricks
- Product
Integration Illustrations
- Illustrative
Examples
- Theory
- Appendices
- References
- Index
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The
GeoStudio Student Edition is a free product designed as an
aid to learning geotechnical numerical modeling. It is an
ideal teaching tool for university professors both at the
undergraduate and graduate levels.
The software contains limited versions of SLOPE/W, SEEP/W,
SIGMA/W, QUAKE/W, TEMP/W, CTRAN/W, AIR/W and VADOSE/W.
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The
GeoStudio Basic Edition is a feature-limited version of seven
products: SLOPE/W, SEEP/W, SIGMA/W, QUAKE/W, TEMP/W, CTRAN/W
and AIR/W. The Basic Edition is ideal for use in routine engineering
practice for the analysis of problems with limited geometric
complexity. While primarily intended for analyzing the stability
of natural and man-made earth slopes, you can also use GeoStudio
Basic for the analysis of confined and unconfined steady-state
seepage problems, for the analysis of linear-elastic settlement
and stress distribution problems, for the tracking of contaminants
within ground water flow and for the analysis of freeze-thaw
problems.
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Pentium
III with Microsoft Windows 2000, XP, or Vista
Intel dual-core processor with 1 GB of RAM recommended
800x600 display (1024x768 or higher is recommended)
Microsoft Internet Explorer 6 or higher
.NET 1.1 (.NET 2.0 included on the CD)
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SEEP/W
2007 ships with these items:
- A
CD-ROM containing GeoStudio 2007 and Seep3D
- A
Resources CD-ROM containing tutorials and detailed example
problems
- Free
Student and Viewer licenses for all software on the CD
(except for Seep3D, which does not have a Student license)
- Hardware
keys for any licenses you purchased. The license files
themselves will be delivered electronically.
- Engineering
Methodology books for each product you purchased
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