SAGA-GIS Tool Library Documentation (v7.7.0)

Tool Soil Water Simulation after Glugla (Table)

A simple model for daily soil water simulation based on the approach of Glugla (1969).

This is a re-implementation of the formulas used in the 'Simpel' model developed by Hoermann (1998), "...covering the lowest, serious end of hydrologic computing".


References


Parameters

 NameTypeIdentifierDescriptionConstraints
InputInputTable, inputINPUT--
OutputSimulationTable, outputSIMULATION--
OptionsDay Identifier (*)Table fieldINPUT_DAYDay specifier, e.g. a date field.-
PrecipitationTable fieldINPUT_P[mm]-
Potential EvapotranspirationTable fieldINPUT_ETP[mm]-
Leaf Area Index (*)Table fieldINPUT_LAI--
DefaultFloating pointINPUT_LAI.Defaultdefault value if no attribute has been selectedDefault: 0.000000
Interception CapacityFloating pointI_MAXLeaf interception capacity [mm] at maximum LAI.Minimum: 0.000000
Default: 2.000000
Minimum LAIFloating pointLAI_MINMinimum leaf area index.Minimum: 0.000000
Default: 0.100000
Maximum LAIFloating pointLAI_MAXMaximum leaf area index.Minimum: 0.000000
Default: 4.000000
Litter CapacityFloating pointLITTER_MAX[mm]Minimum: 0.000000
Default: 0.000000
Litter Drying FactorFloating pointLITTER_CFCurvature factor determining the drying of the litter storage.Minimum: 0.000000
Default: 3.000000
Initial Litter Water ContentFloating pointLITTER_0[mm]Minimum: 0.000000
Default: 0.000000
Glugla CoefficientFloating pointGLUGLAEmpirical parameter [mm/day], depends on soil texture and structure.Minimum: 0.000000
Default: 150.000000
RootingBooleanDO_ROOTING-Default: 0
Soil LayersStatic tableSOIL_LAYERSProvide a row for each soil layer: depth [cm], field capacity [vol.%], permanent wilting point [vol.%], maximum ET [vol.%/day], rooting [% of total], initial water content [vol.%].6 Fields:
- 1. [8 byte floating point number] Depth
- 2. [8 byte floating point number] FC
- 3. [8 byte floating point number] PWP
- 4. [8 byte floating point number] ETmax
- 5. [8 byte floating point number] Rooting
- 6. [8 byte floating point number] Water_0
(*) optional

Command-line

Usage: saga_cmd sim_hydrology 10 [-INPUT <str>] [-INPUT_DAY <str>] [-INPUT_P <str>] [-INPUT_ETP <str>] [-INPUT_LAI <str>] [-INPUT_LAI.Default <double>] [-SIMULATION <str>] [-I_MAX <double>] [-LAI_MIN <double>] [-LAI_MAX <double>] [-LITTER_MAX <double>] [-LITTER_CF <double>] [-LITTER_0 <double>] [-GLUGLA <double>] [-DO_ROOTING <str>] [-SOIL_LAYERS <str>]
  -INPUT:<str>               	Input
	Table, input
  -INPUT_DAY:<str>           	Day Identifier
	Table field
  -INPUT_P:<str>             	Precipitation
	Table field
  -INPUT_ETP:<str>           	Potential Evapotranspiration
	Table field
  -INPUT_LAI:<str>           	Leaf Area Index
	Table field
  -INPUT_LAI.Default:<double>	Default
	Floating point
	Default: 0.000000
  -SIMULATION:<str>          	Simulation
	Table, output
  -I_MAX:<double>            	Interception Capacity
	Floating point
	Minimum: 0.000000
	Default: 2.000000
  -LAI_MIN:<double>          	Minimum LAI
	Floating point
	Minimum: 0.000000
	Default: 0.100000
  -LAI_MAX:<double>          	Maximum LAI
	Floating point
	Minimum: 0.000000
	Default: 4.000000
  -LITTER_MAX:<double>       	Litter Capacity
	Floating point
	Minimum: 0.000000
	Default: 0.000000
  -LITTER_CF:<double>        	Litter Drying Factor
	Floating point
	Minimum: 0.000000
	Default: 3.000000
  -LITTER_0:<double>         	Initial Litter Water Content
	Floating point
	Minimum: 0.000000
	Default: 0.000000
  -GLUGLA:<double>           	Glugla Coefficient
	Floating point
	Minimum: 0.000000
	Default: 150.000000
  -DO_ROOTING:<str>          	Rooting
	Boolean
	Default: 0
  -SOIL_LAYERS:<str>         	Soil Layers
	Static table
	6 Fields:
	- 1. [8 byte floating point number] Depth
	- 2. [8 byte floating point number] FC
	- 3. [8 byte floating point number] PWP
	- 4. [8 byte floating point number] ETmax
	- 5. [8 byte floating point number] Rooting
	- 6. [8 byte floating point number] Water_0