t.water.hazard - GRASS GIS manual

NAME

t.water.hazard - Takes an input watermask STRDS generated by t.sentinel_1.watermasks and calculates flood frequency and flood depth maps from it.

KEYWORDS

display, raster

SYNOPSIS

t.water.hazard

t.water.hazard --help

t.water.hazard [-rdp] input=string [dem=string] output_frequency=string [output_permwater=string] [input_permwater=string] [output_countdates=string] [output_flooddepth=string] [flooddepth_parameter=string] [perm_threshold=integer] [--help] [--verbose] [--quiet] [--ui]

Flags:

-r: Calculate relative flood frequency as percentage of flood pixel occurence relative to total coverages
-d: Estimate flood depth based on input DEM
-p: Don't estimate permanent water bodies, provide water body input raster instead
--help: Print usage summary
--verbose: Verbose module output
--quiet: Quiet module output
--ui: Force launching GUI dialog

Parameters:

input=string [required]: Input space time raster dataset (STRDS) containing water masks; Use t.sentinel_1.watermasks to calculate the STRDS
dem=string: Input DEM to calculate flood depth; Input DEM to calculate flood depth
output_frequency=string [required]: Output flood frequency map
output_permwater=string: Output permanent water raster
input_permwater=string: Input permanent water raster; Only valid if -p flag is set. No output permanent water map will be produced
output_countdates=string: Output raster map with no. of scenes per pixel
output_flooddepth=string: Output raster map with flooddepth statistics
flooddepth_parameter=string: Flooddepth statistic; Used to aggregate the individual flood depth rasters; Options: average, median, minimum, maximum, range, quart1, quart3, perc90; Default: median
perm_threshold=integer: Pixels that are water [perm_threshold]% of the times are classified as permanent water; Default: 50