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