Compound Hydrologic Terrain Analysis

Author: O.Conrad (c) 2024
Menu: Terrain Analysis | Compound Analyses

Description

A one-step tool for the creation of selected terrain parameters related to hydrology.For details look at the description of the tools used for processing:

[ta_preproc] Sink Removal
[ta_preproc] Fill Sinks (Wang & Liu)
[ta_preproc] Breach Depressions
[ta_hydrology] Flow Accumulation (Top-Down)
[ta_hydrology] Flow Accumulation (Flow Tracing)
[ta_hydrology] Topographic Wetness Index
[ta_hydrology] SAGA Wetness Index
[ta_hydrology] LS Factor
[ta_hydrology] CIT

Parameters

	Name	Type	Identifier	Description	Constraints
Input	Elevation	grid, input	`ELEVATION`	-	-
Output	Closed Depressions	grid, output, optional	`SINKS`	-	-
	Total Catchment Area	grid, output	`TCA`	-	-
	Specific Catchment Area	grid, output	`SCA`	-	-
	Topographic Wetness Index	grid, output	`TWI`	-	-
	SAGA Topographic Wetness Index	grid, output	`TWI_SAGA`	-	-
	LS Factor	grid, output	`LS`	-	-
	Stream Power Index	grid, output	`SPI`	-	-
	Channel Initiation Threshold	grid, output	`CIT`	-	-
Options	Grid System	grid system	`PARAMETERS_GRID_SYSTEM`	-	-
	Preprocessing	choice	`METHOD_PREPROC`	-	Available Choices: [0] Sink Removal [1] Fill Sinks (Wang & Liu) [2] Breach Depressions [3] none Default: 0
	Flow Accumulation	choice	`METHOD_FLOWACC`	Algorithm used to calculate total catchment area.	Available Choices: [0] Deterministic 8 [1] Rho 8 [2] Deterministic Infinity [3] Multiple Flow Direction [4] Multiple Triangular Flow Direction [5] Multiple Maximum Downslope Gradient Based Flow Direction [6] Kinematic Routing Algorithm [7] DEMON Default: 3
	LS Factor	choice	`METHOD_LS`	-	Available Choices: [0] Moore et al. 1991 [1] Desmet & Govers 1996 [2] Boehner & Selige 2006 Default: 0

Command Line


Usage: saga_cmd ta_compound 2 [-ELEVATION ] [-SINKS ] [-TCA ] [-SCA ] [-TWI ] [-TWI_SAGA ] [-LS ] [-SPI ] [-CIT ] [-METHOD_PREPROC ] [-METHOD_FLOWACC ] [-METHOD_LS ]
  -ELEVATION:     	Elevation
	grid, input
  -SINKS:         	Closed Depressions
	grid, output, optional
  -TCA:           	Total Catchment Area
	grid, output
  -SCA:           	Specific Catchment Area
	grid, output
  -TWI:           	Topographic Wetness Index
	grid, output
  -TWI_SAGA:      	SAGA Topographic Wetness Index
	grid, output
  -LS:            	LS Factor
	grid, output
  -SPI:           	Stream Power Index
	grid, output
  -CIT:           	Channel Initiation Threshold
	grid, output
  -METHOD_PREPROC:	Preprocessing
	choice
	Available Choices:
	[0] Sink Removal
	[1] Fill Sinks (Wang & Liu)
	[2] Breach Depressions
	[3] none
	Default: 0
  -METHOD_FLOWACC:	Flow Accumulation
	choice
	Available Choices:
	[0] Deterministic 8
	[1] Rho 8
	[2] Deterministic Infinity
	[3] Multiple Flow Direction
	[4] Multiple Triangular Flow Direction
	[5] Multiple Maximum Downslope Gradient Based Flow Direction
	[6] Kinematic Routing Algorithm
	[7] DEMON
	Default: 3
  -METHOD_LS:     	LS Factor
	choice
	Available Choices:
	[0] Moore et al. 1991
	[1] Desmet & Govers 1996
	[2] Boehner & Selige 2006
	Default: 0