Model:Area-Slope Equation Calculator

From CSDMS

Area-Slope Equation Calculator



Metadata

Also known as
Model type Tool
Incorporated models or components:
Spatial dimensions 2D
Spatial extent Landscape-Scale, Watershed-Scale
Model domain Hydrology, Terrestrial
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,


First name Sagy
Last name 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


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


First name Greg
Last name 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
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:
  1. Flow Direction (ArcGIS format);
  2. Contributing Area (Flow Accumulation-ArcGIS format);
  3. Slope (ArcGIS format);
Input format ASCII
Other input format
Describe output parameters Two output maps ESRI ASCII format:
  1. Alpha (coefficient);
  2. 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 No but possible
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
Sagy Cohen
Willgoose, Hancock

  • Download Area-Slope Equation Calculator version: 0.1
    Doi: 10.1594/IEDA/100090
Citation indices Area
Citations: 31
h-index: 1

link=http://csdms.colorado.edu/mediawiki/images/Qrcode_Area-Slope Equation Calculator.png
Link to this page



Introduction

History

References




Citation indices Area
Citations: 31
h-index: 1


Publication(s)YearModel describedType of ReferenceCitations
Cohen, Sagy, Willgoose, Garry, Hancock, Greg, 2008. A methodology for calculating the spatial distribution of the area-slope equation and the hypsometric integral within a catchment. Journal of Geophysical Research: Earth Surface, 113, F03027. 10.1029/2007JF000820
(View/edit entry)
2008Area-Slope Equation Calculator
PsHIC
Model overview 31
Cohen, S.; Willgoose, G.; Hancock, G., 2011. Area-Slope Equation Calculator, version 0.1.. , , http://csdms.colorado.edu/pub/models/doi-source-code/area-slope_equation_calculator-10.1594.IEDA.100090-0.1.tar.gz. 10.1594/IEDA/100090
(View/edit entry)
2011Area-Slope Equation Calculator
Source code ref. --

Issues

Help

If you need help just send me an email to

sagy.cohen@uon.edu.au

Input Files

Output Files