Model:Area-Slope Equation Calculator
From CSDMS
Area-Slope Equation Calculator
Introduction
History
Papers
Area-Slope Equation Calculator Questionnaire
Contact Information
| Model: | Area-Slope Equation Calculator |
| Contact person: | Sagy Cohen (Model developer) |
| Institute: | The University of Newcastle |
| City: | Callaghan |
| Country: | Australia |
| Email: | sagy.cohen@newcastle.edu.au |
| 2nd person involved: | Garry Willgoose (Model developer) |
| 3rd person involved: | Greg Hancock (Model developer) |
Model Description
| Model type: | Modular model for the Hydrological domain. |
| Description: | Traditionally the Area-Slope equation (S=cA^alpha) is extracted from a catchment area vs. slope plot. This model calculate the Area-Slope constant and coefficient (alpha) for each pixel at the catchment as a function of its downslope neighbor. |
Technical information
| Supported platforms: | Windows |
| Programming language: | Matlab |
| Model development started at: | 2006 and ended in 2009. |
| To what degree will the model become available: | An executable will be available |
| Current license type: | -- |
| Memory requirements: | -- |
| Typical run time: | Minutes |
Input / Output description
| Input parameters: | Three input maps at ESRI ASCII format:
|
| Input format: | ASCII |
| Output parameters: | Two output maps ESRI ASCII format:
|
| Output format: | ASCII |
| Post-processing software (if needed): | Yes, ArcGIS or other to convert ASCII output to map. |
| Visualization software (if needed): | Yes, ESRI, Matlab. |
Process description
| Processes represented by model: | Extract c and alpha from: Slope=cArea^alpha |
| Key physical parameters & equations: | -- |
| Length scale & resolution constraints: | Computer memory |
| Time scale & resolution constraints: | -- |
| Numerical limitations and issues : | Artificially limit the alpha values between 2 and -2 and the constant values between 0 and 2. Done so to avoid extreme outliers. |
Testing
| Available calibration data sets: | Cohen, S., G. Willgoose, and G. Hancock (2008), A methodology for calculating the spatial distribution of the area-slope equation and the hypsometric integral within a catchment, J. Geophys. Res., 113, F03027, doi:10.1029/2007JF000820. |
| Available test data sets: | Demo data included. 107x127 pixels catchment. |
| Ideal data for testing: | Reasonable relief catchment. |
User groups
| Currently or plans for collaborating with: | -- |
Documentation
| Key papers of the model: | Cohen, S., G. Willgoose, and G. Hancock (2008), A methodology for calculating the spatial distribution of the area-slope equation and the hypsometric integral within a catchment, J. Geophys. Res., 113, F03027, doi:10.1029/2007JF000820. |
| Is there a manual available: | No |
| Model website if any: | -- |
Additional comments
| Comments: | -- |
