Model:Area-Slope Equation Calculator

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Area-Slope Equation Calculator

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Summary Contact Technical specs In/Output Process Testing Other Component info 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 USA"USA" is not in the list (Afghanistan, Albania, Algeria, Andorra, Angola, Antigua and Barbuda, Argentina, Armenia, Australia, Austria, ...) of allowed values for the "Country" property. 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 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 Link to file 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 Area-Slope Equation Calculator FwDET GLUDM MARM5D PsHIC WBMsed

Download statistics

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Papers

1. 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, Journal of Geophysical Research, 113, F03027, DOI Link.

Help

If you need help just send me an email to

sagy.cohen@uon.edu.au