VADOSE/W is a finite element CAD software product for analyzing flow from
the environment, across the ground surface, through the unsaturated
vadose zone and into the local groundwater regime. Its comprehensive
formulation allows the analysis of both simple and complex problems,
from a simple analysis of ground infiltration due to rainfall,
to a sophisticated model considering
snow melt and root transpiration as well as surface evaporation, runoff,
ponding, and gas diffusion. VADOSE/W can be applied to the analysis and
design of geotechnical, mining, hydrogeological, agricultural, and civil
Environmental Impact on Soil Conditions
Understanding unsaturated soil mechanics is now critical for geotechnical
engineers performing slope stability analyses, designing soil covers
for mine or municipal waste facilities, or determining the effect of
agricultural or irrigation projects on groundwater flow. Environmental
conditions at the ground surface, such as precipitation, evaporation
and transpiration, have been increasingly recognized as having a
significant impact on soil behaviour in the unsaturated or vadose zone.
In fact, “unsaturated soil mechanics may have more to do with the
ground surface moisture flux conditions than it has to do with the
thickness of the unsaturated soil zone” (D.G. Fredlund, Geotechnical
News, Dec. 2001). So how can you determine the impact of
environmental conditions on the unsaturated zone? VADOSE/W provides a
solution to this problem.
Easy to Use
A Complete Modeling Solution
Beginning an analysis is as simple as defining the geometry by drawing
regions and lines that identify soil layers, or by importing a DXF™ file,
and add a soil cover at the surface.
Then graphically apply boundary conditions and specify material properties.
Material properties can be estimated from easily
measured parameters like grain-size, saturated conductivity, saturated
water content, and the air-entry value, or imported from the included databases.
Boundary conditions can be fully coupled to the climate, as a function of time,
or as specific values for temperature, head, pressure, total or unit water flux,
or a potential seepage surface.
Define initial conditions for the analysis by drawing an initial water table and
nodal temperatures, or by using computed results from a previously solved problem.
Scale data automatically in order to conduct sensitivity studies or to create data
suited to your specific site.
Viewing the Analysis Results
Once you have solved your evaporative flux problem, VADOSE/W offers many tools for viewing results.
Generate contours or x-y plots of any computed parameter for any time steps. 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 prepare the results for your report by adding labels, axes,
and pictures, or export the results into other applications such as
Microsoft® Excel® for further analysis.
Using VADOSE/W, you can analyze 2D flux boundary problems such as:
- Design and performance monitoring of single or multi-layered soil covers over mine and municipal waste facilities
- Development of climate controlled pore-water pressure distributions on natural or man-made slopes for use in stability analyses
- Determining infiltration, evaporation and transpiration rates resulting from agriculture, irrigation projects, or natural systems
- Predicting oxygen or radon gas diffusion and decay through the vadose zone
- plus many more!