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, input, optional | TCA | - | - | |
Output | Flow Width | Grid, output | WIDTH | - | - |
Specific Catchment Area (SCA) | Grid, output | SCA | - | - | |
Options | Grid System | Grid system | PARAMETERS_GRID_SYSTEM | - | - |
Coordinate Unit | Choice | COORD_UNIT | - | Available Choices: [0] meter [1] feet Default: 0 | |
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>] [-COORD_UNIT <str>] [-METHOD <str>] -DEM:<str> Elevation Grid, input -WIDTH:<str> Flow Width Grid, output -TCA:<str> Total Catchment Area (TCA) Grid, input, optional -SCA:<str> Specific Catchment Area (SCA) Grid, output -COORD_UNIT:<str> Coordinate Unit Choice Available Choices: [0] meter [1] feet Default: 0 -METHOD:<str> Method Choice Available Choices: [0] Deterministic 8 [1] Multiple Flow Direction (Quinn et al. 1991) [2] Aspect Default: 2