Tool Edge Contamination
This tool uses flow directions to estimate possible contamination effects moving from outside of the grid passing the edge into its interior. This means that derived contributing area values might be underestimated for the marked cells. Cells not contamined will be marked as no data. 
- Author: V.Olaya (c) 2004
- Menu: Terrain Analysis|Hydrology|Flow Accumulation
Parameters
|  | Name | Type | Identifier | Description | Constraints | 
|---|
| Input | Elevation | Grid (input) | ELEVATION | - | - | 
| Output | Edge Contamination | Grid (output) | CONTAMINATION | - | - | 
| Options | Grid System | Grid system | PARAMETERS_GRID_SYSTEM | - | - | 
 | Method | Choice | METHOD | - | Available Choices: [0] single flow direction
 [1] multiple flow direction
 Default: 0
 | 
Command-line
Usage: saga_cmd ta_hydrology 13 [-ELEVATION <str>] [-CONTAMINATION <str>] [-METHOD <str>]
  -ELEVATION:<str>    	Elevation
	Grid (input)
  -CONTAMINATION:<str>	Edge Contamination
	Grid (output)
  -METHOD:<str>       	Method
	Choice
	Available Choices:
	[0] single flow direction
	[1] multiple flow direction
	Default: 0