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