SAGA-GIS Tool Library Documentation (v7.8.2)

Tool Cold Air Flow

A simple cold air flow simulation.


References


Parameters

 NameTypeIdentifierDescriptionConstraints
InputElevationGrid, inputDEM--
Production (*)Grid, input, optionalPRODUCTIONRate of cold air production [m/h].-
Surface Friction Coefficient (*)Grid, input, optionalFRICTIONSurface friction coefficient.-
OutputCold Air HeightGrid, outputAIR--
Velocity (*)Grid, output, optionalVELOCITY--
OptionsGrid SystemGrid systemPARAMETERS_GRID_SYSTEM--
DefaultFloating pointPRODUCTION_DEFAULTdefault value if no grid has been selectedMinimum: 0.000000
Default: 1.000000
DefaultFloating pointFRICTION_DEFAULTdefault value if no grid has been selectedMinimum: 0.000000
Default: 1.000000
ResetBooleanRESET-Default: 1
Simulation Time [h]Floating pointTIME_STOPSimulation time in hours.Minimum: 0.000000
Default: 6.000000
Map Update Frequency [min]Floating pointTIME_UPDATE-Minimum: 0.000000
Default: 10.000000
EdgeChoiceEDGE-Available Choices:
[0] closed
[1] open
Default: 1
Time Step AdjustmentFloating pointDELAYChoosing a lower value will result in a better numerical precision but also in a longer calculation time.Minimum: 0.010000
Maximum: 1.000000
Default: 0.500000
Surrounding Air TemperatureFloating pointT_AIRSurrounding air temperature [degree Celsius].Minimum: -273.150000
Default: 15.000000
Cold Air TemperatureFloating pointT_AIR_COLDCold air temperature [degree Celsius].Minimum: -273.150000
Default: 5.000000
(*) optional

Command-line

Usage: saga_cmd sim_air_flow 0 [-DEM <str>] [-PRODUCTION <str>] [-PRODUCTION_DEFAULT <double>] [-FRICTION <str>] [-FRICTION_DEFAULT <double>] [-AIR <str>] [-VELOCITY <str>] [-RESET <str>] [-TIME_STOP <double>] [-TIME_UPDATE <double>] [-EDGE <str>] [-DELAY <double>] [-T_AIR <double>] [-T_AIR_COLD <double>]
  -DEM:<str>                  	Elevation
	Grid, input
  -PRODUCTION:<str>           	Production
	Grid, input, optional
  -PRODUCTION_DEFAULT:<double>	Default
	Floating point
	Minimum: 0.000000
	Default: 1.000000
  -FRICTION:<str>             	Surface Friction Coefficient
	Grid, input, optional
  -FRICTION_DEFAULT:<double>  	Default
	Floating point
	Minimum: 0.000000
	Default: 1.000000
  -AIR:<str>                  	Cold Air Height
	Grid, output
  -VELOCITY:<str>             	Velocity
	Grid, output, optional
  -RESET:<str>                	Reset
	Boolean
	Default: 1
  -TIME_STOP:<double>         	Simulation Time [h]
	Floating point
	Minimum: 0.000000
	Default: 6.000000
  -TIME_UPDATE:<double>       	Map Update Frequency [min]
	Floating point
	Minimum: 0.000000
	Default: 10.000000
  -EDGE:<str>                 	Edge
	Choice
	Available Choices:
	[0] closed
	[1] open
	Default: 1
  -DELAY:<double>             	Time Step Adjustment
	Floating point
	Minimum: 0.010000
	Maximum: 1.000000
	Default: 0.500000
  -T_AIR:<double>             	Surrounding Air Temperature
	Floating point
	Minimum: -273.150000
	Default: 15.000000
  -T_AIR_COLD:<double>        	Cold Air Temperature
	Floating point
	Minimum: -273.150000
	Default: 5.000000