Model:Area-Slope Equation Calculator

Area-Slope Equation Calculator

Metadata

Also known as
Model type	Tool
Model part of larger framework
Note on status model
Date note status model

Incorporated models or components:

Spatial dimensions	2D
Spatial extent	Landscape-Scale, Watershed-Scale
Model domain
One-line model description	Pixel scale Area-Slope equation calculator
Extended model 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.

Keywords:	geomorphologic, catchment,

Name	Sagy Cohen
Type of contact	Model developer
Institute / Organization	CSDMS, University of Colorado
Postal address 1	1560 30th Street
Postal address 2
Town / City	Boulder
Postal code	80309
State	Colorado
Country	United States
Email address	sagy.cohen@colorado.edu
Phone
Fax

Name	Garry Willgoose
Type of contact
Institute / Organization
Postal address 1
Postal address 2
Town / City
Postal code
State
Country
Email address
Phone
Fax

Name	Greg Hancock
Type of contact
Institute / Organization
Postal address 1
Postal address 2
Town / City
Postal code
State
Country
Email address
Phone
Fax

Supported platforms	Unix, Linux, Mac OS, Windows
Other platform
Programming language	Matlab
Other program language
Code optimized	Single Processor
Multiple processors implemented
Nr of distributed processors
Nr of shared processors
Start year development	2006
Does model development still take place?	No
If above answer is no, provide end year model development	2009
Code development status
When did you indicate the 'code development status'?
Model availability	As code
Source code availability (Or provide future intension)	Through CSDMS repository
Source web address
Source csdms web address	https://github.com/csdms-contrib/area-slope_equation_calculator
Program license type	Other
Program license type other	--
Memory requirements	--
Typical run time	Minutes

Describe input parameters	Three input maps at ESRI ASCII format: Flow Direction (ArcGIS format); Contributing Area (Flow Accumulation-ArcGIS format); Slope (ArcGIS format);
Input format	ASCII
Other input format
Describe output parameters	Two output maps ESRI ASCII format: Alpha (coefficient); Constant.
Output format	ASCII
Other output format
Pre-processing software needed?	Yes
Describe pre-processing software	ArcGIS for calculating Area, Slope and D8 Flow direction
Post-processing software needed?	Yes
Describe post-processing software	ArcGIS or other to convert ASCII output to map.
Visualization software needed?	Yes
If above answer is yes	ESRI, Matlab
Other visualization software

Describe processes represented by the model	Extract c and alpha from: Slope=cArea^alpha For more details: 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.
Describe key physical parameters and equations	--
Describe length scale and resolution constraints	Computer memory.
Describe time scale and resolution constraints	--
Describe any 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.

Describe 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.
Upload calibration data sets if available:
Describe available test data sets
Upload test data sets if available:	Media:Area demo.txt, Media:Slope demo.txt, Media:Flowdir demo.txt
Describe ideal data for testing	Reasonable relief catchment.

Do you have current or future plans for collaborating with other researchers?	--

Is there a manual available?	No
Upload manual if available:
Model website if any
Model forum / discussion board

Comments	Run this model via MATLAB

This part will be filled out by CSDMS staff

OpenMI compliant	No but possible
BMI compliant	No but possible
WMT component	Not yet"Not yet" is not in the list (Yes, In progress, No but possible, No not possible) of allowed values for the "Code CMT compliant or not" property.
PyMT component
Is this a data component

DOI model	10.1594/IEDA/100090
For model version	0.1
Year version submitted	2011
Link to file	http://csdms.colorado.edu/pub/models/doi-source-code/area-slope_equation_calculator-10.1594.IEDA.100090-0.1.tar.gz

Can be coupled with:

Model info

Authors

Sagy Cohen

Willgoose, Hancock

Source code

View in CSDMS GitHub repository

DOI

Download Area-Slope Equation Calculator version: 0.1
Doi: 10.1594/IEDA/100090

Model citations

Nr. of publications:	2
Total citations:	61
h-index:	1
m-quotient:	0.06

QR-code

Link to this page

Other models by author

Introduction

History

References

Source code

Suggested way to reference a version of the model source code following data reference guidelines:

The part "]]" of the query was not understood.</br>Results might not be as expected.

Publication(s)	Model described	Citations

Overview and general

The part "]]" of the query was not understood.</br>Results might not be as expected.

Publication(s)	Model described	Citations

Applications

The part "]]" of the query was not understood.</br>Results might not be as expected.

Publication(s)	Model described	Citations

Related theory and data

The part "]]" of the query was not understood.</br>Results might not be as expected.

Publication(s)	Model described	Citations

Issues

Help

If you need help just send me an email to

sagy.cohen@uon.edu.au

Input Files

Output Files