This tool calculates the vertical distance to a channel network base level. The algorithm consists of two major steps:
1. Interpolation of a channel network base level elevation
2. Subtraction of this base level from the original elevations
| Name | Type | Identifier | Description | Constraints |
Input | Elevation | Grid, input | ELEVATION | A grid that contains elevation data. | - |
Channel Network | Grid, input | CHANNELS | A grid providing information about the channel network. It is assumed that no-data cells are not part of the channel network. Vice versa all others cells are recognised as channel network members. | - |
Output | Vertical Distance to Channel Network | Grid, output | DISTANCE | The resulting grid gives the altitude above the channel network in the same units as the elevation data. | - |
Channel Network Base Level (*) | Grid, output, optional | BASELEVEL | This optional grid output contains the interpolated channel network base level elevations. | - |
Options | Grid System | Grid system | PARAMETERS_GRID_SYSTEM | - | - |
Tension Threshold | Floating point | THRESHOLD | Maximum change in elevation units (e.g. meter), iteration is stopped once maximum change reaches this threshold. | Minimum: 0.000000 Default: 1.000000 |
Maximum Iterations | Integer | MAXITER | Maximum number of iterations, ignored if set to zero | Minimum: 0 Default: 0 |
Keep Base Level below Surface | Boolean | NOUNDERGROUND | - | Default: 1 |
(*) optional |