Label | Explanation | Data Type |
Input groundwater head elevation raster | The input raster where each cell value represents the groundwater head elevation at that location. The head is typically an elevation above some datum, such as mean sea level. | Raster Layer |
Input effective formation porosity raster | The input raster where each cell value represents the effective formation porosity at that location. | Raster Layer |
Input saturated thickness raster | The input raster where each cell value represents the saturated thickness at that location. The value for the thickness is interpreted from geological properties of the aquifer. | Raster Layer |
Input formation transmissivity raster | The input raster where each cell value represents the formation transmissivity at that location. 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. Tables 1 and 2 in How Darcy Flow and Darcy Velocity work list ranges of hydraulic conductivities for some generalized geologic materials. | Raster Layer |
Output magnitude raster | The output flow direction raster. Each cell value represents the direction of the seepage velocity vector (average linear velocity) at the center of the cell, calculated as the average value of the seepage velocity through the four faces of the cell. It is used with the output magnitude raster to describe the flow vector. | Raster Dataset |
Return Value
Label | Explanation | Data Type | Output direction raster | The output flow direction raster. Each cell value represents the direction of the seepage velocity vector (average linear velocity) at the center of the cell, calculated as the average value of the seepage velocity through the four faces of the cell. It is used with the output magnitude raster to describe the flow vector. | Raster |