Tool Flow Width and Specific Catchment Area
Flow width and specific catchment area (SCA) calculation. SCA calculation needs total catchment area (TCA) as input, which can be calculated with one of the flow accumulation tools.
References
- Gruber, S., Peckham, S. (2008): Land-Surface Parameters and Objects in Hydrology. In: Hengl, T. and Reuter, H.I. [Eds.]: Geomorphometry: Concepts, Software, Applications. Developments in Soil Science, Elsevier, 33:293-308. https://www.elsevier.com/books/geomorphometry/hengl/978-0-12-374345-9.
- Quinn, P.F., Beven, K.J., Chevallier, P., Planchon, O. (1991): The prediction of hillslope flow paths for distributed hydrological modelling using digital terrain models. Hydrological Processes, 5:59-79 http://onlinelibrary.wiley.com/doi/10.1002/hyp.3360050106/full.
- Author: O.Conrad (c) 2009
- Menu: Terrain Analysis|Hydrology|Flow Accumulation
Parameters
| | Name | Type | Identifier | Description | Constraints |
|---|
| Input | Elevation | Grid (input) | DEM | - | - |
| Total Catchment Area (TCA) (*) | Grid (optional input) | TCA | - | - |
| Output | Flow Width | Grid (output) | WIDTH | - | - |
| Specific Catchment Area (SCA) | Grid (output) | SCA | - | - |
| Options | Grid system | Grid system | PARAMETERS_GRID_SYSTEM | - | - |
| Method | Choice | METHOD | - | Available Choices:
[0] Deterministic 8
[1] Multiple Flow Direction (Quinn et al. 1991)
[2] Aspect
Default: 2 |
| (*) optional |
Command-line
Usage: saga_cmd ta_hydrology 19 [-DEM <str>] [-WIDTH <str>] [-TCA <str>] [-SCA <str>] [-METHOD <str>]
-DEM:<str> Elevation
Grid (input)
-WIDTH:<str> Flow Width
Grid (output)
-TCA:<str> Total Catchment Area (TCA)
Grid (optional input)
-SCA:<str> Specific Catchment Area (SCA)
Grid (output)
-METHOD:<str> Method
Choice
Available Choices:
[0] Deterministic 8
[1] Multiple Flow Direction (Quinn et al. 1991)
[2] Aspect
Default: 2