Tool Name	Terrain Flooding
Tool ID	32
Library ID	ta_hydrology
Version	1.0
Author(s)	V. Wichmann (c) 2022

Description

The tool allows one to flood a digital elevation model for a given water level. The water level can be provided either as absolute height or relative to the DEM.
If the water level is given relative to the DEM, the tool can model a constant water level starting from the seed cell, or a water level that is always relative to the currently processed cell. This way also inclined water surfaces, e.g. along a river, can be modelled. Note that this usually requires rather small relative water levels in order to prevent the flooding of the complete DEM; the functionality is most suited to generate a segment (connected component) of a river bed.

Parameters

Name	Type	Identifier	Description	Constraints
Input
DEM	grid, input	DEM	The digital elevation model to flood.
Seed Points	shapes, input	SEEDS	The point(s) from where to start the flooding.
Output
Water Body	grid, output	WATER_BODY	The extent of the water body, labeled with local water depth [map units].
Flooded DEM	grid, output, optional	DEM_FLOODED	The flooded digital elevation model.
Options
Water Level	table field	WATER_LEVEL	The attribute field with the local water level, given either relative to the DEM or as absolute height [map units].
Default	floating point number	WATER_LEVEL_DEFAULT	default value if no attribute has been selected	Default: 0.500000
Water Level Reference	choice	LEVEL_REFERENCE		Available Choices: [0] level is given relative to DEM [1] level is given as absolute water height Default: 0
Constant Water Level	boolean	CONSTANT_LEVEL	Model the water level as constant. Otherwise the specified level is always taken as relative to the currently processed cell. This option is only available if the water level reference is relative to the DEM.	Default: 1