SAGA-GIS Tool Library Documentation (v9.1.2)

Tool A Simple Litter System

A simple numerical litter system model demonstrating the usage of the Euler method. Litter carbon storage (C) is calculated in dependency of litter fall rate (Cinput) and rate constant for litter loss (Closs) as:


Typical values:

Tropical RainforestTemperate forestBoreal forest
Litter fall rate [g/m2/yr]50024050
Litter loss rate [1/yr]2.00.40.05


References


Parameters

 NameTypeIdentifierDescriptionConstraints
OutputLitterTable, outputTABLE--
OptionsTime SpanFloating pointTIME_SPAN[yrs]Minimum: 0.000000
Default: 50.000000
Time IntervalFloating pointTIME_STEP[yrs]Minimum: 0.000000
Default: 0.100000
Initial Litter StorageFloating pointC_INIT[g/m2]Minimum: 0.000000
Default: 0.000000
PresetsChoicePRESETS-Available Choices:
[0] Tropical forest
[1] Temperate forest
[2] Boreal forest
[3] Adjust parameters manually
Default: 3
Litterfall RateFloating pointC_INPUT[g/m2/yr]Minimum: 0.000000
Default: 240.000000
Rate Constant for Litter LossFloating pointC_OUTPUT[1/yr]Minimum: 0.000000
Default: 0.400000

Command-line

Usage: saga_cmd sim_ecosystems_hugget 0 [-TABLE <str>] [-TIME_SPAN <double>] [-TIME_STEP <double>] [-C_INIT <double>] [-PRESETS <str>] [-C_INPUT <double>] [-C_OUTPUT <double>]
  -TABLE:<str>       	Litter
	Table, output
  -TIME_SPAN:<double>	Time Span
	Floating point
	Minimum: 0.000000
	Default: 50.000000
  -TIME_STEP:<double>	Time Interval
	Floating point
	Minimum: 0.000000
	Default: 0.100000
  -C_INIT:<double>   	Initial Litter Storage
	Floating point
	Minimum: 0.000000
	Default: 0.000000
  -PRESETS:<str>     	Presets
	Choice
	Available Choices:
	[0] Tropical forest
	[1] Temperate forest
	[2] Boreal forest
	[3] Adjust parameters manually
	Default: 3
  -C_INPUT:<double>  	Litterfall Rate
	Floating point
	Minimum: 0.000000
	Default: 240.000000
  -C_OUTPUT:<double> 	Rate Constant for Litter Loss
	Floating point
	Minimum: 0.000000
	Default: 0.400000