ArcObjects Library Reference (SpatialAnalyst)

IGroundwaterOp.DarcyVelocity Method

Calculates the groundwater seepage velocity vector (direction and magnitude) for steady flow in an aquifer.

[Visual Basic .NET]
Public Function DarcyVelocity ( _
    ByVal headRaster As IGeoDataset, _
    ByVal porosityRaster As IGeoDataset, _
    ByVal thicknessRaster As IGeoDataset, _
    ByVal transmissivityRaster As IGeoDataset _
) As IGeoDataset

[C#]
public IGeoDataset DarcyVelocity (
    IGeoDataset headRaster,
    IGeoDataset porosityRaster,
    IGeoDataset thicknessRaster,
    IGeoDataset transmissivityRaster
);

[C++]
HRESULT DarcyVelocity(
  IGeoDataset* headRaster,
  IGeoDataset* porosityRaster,
  IGeoDataset* thicknessRaster,
  IGeoDataset* transmissivityRaster,
  IGeoDataset** residualDataset
);

[C++]

Parameters
headRaster [in]

  headRaster is a parameter of type IGeoDataset
porosityRaster [in]

  porosityRaster is a parameter of type IGeoDataset
thicknessRaster [in]

  thicknessRaster is a parameter of type IGeoDataset
transmissivityRaster [in]

  transmissivityRaster is a parameter of type IGeoDataset
residualDataset [out, retval]

  residualDataset is a parameter of type IGeoDataset

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server. Requires Spatial Analyst Extension.

Remarks

headRaster	Raster containing values of groundwater head elevation for each cell in the raster. The head is typically an elevation above some datum, such as mean sea level.
porosityRaster	Raster containing values of effective formation porosity for each cell in the raster
thicknessRaster	Raster containing values of saturated thickness for each cell in the raster
transmissivityRaster	Raster containing values of formation transmissivity for each cell in the raster The transmissivity of an aquifer is defined as the hydraulic conductivity K times the saturated aquifer thickness b, as units of length squared over time. This property is generally estimated from field experimental data such as pumping tests.

The method returns a reference to a Raster object.
Use a RasterBandCollection for output direction and magnitude rasters.
Read the Working with ArcGIS Spatial Analyst objects technical document for general information on implementing Spatial Analyst operations.

IGroundwaterOp.DarcyVelocity Method

Product Availability

Remarks

See Also