Model:SurfaceRoughness

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SurfaceRoughness

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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 Model domain Terrestrial One-line model description Quantifies surface roughness with high-resolution topographic data by analyzing the local variability of surface normal vectors. Extended model description This tool can be used to map out areas of hillslopes where the emergence of bedrock drives an increase in surface roughness. The tool requires an input DEM in float format and will output the rasters, also in float format, for three eigenvectors that together describe the distribution of normal vectors within a user-defined neighbourhood for each pixel. Keywords: Rock Exposure, Surface Roughness, LiDAR, Name David Milodowski Type of contact Model developer Institute / Organization University of Edinburgh, School of GeoSciences Postal address 1 Geography Building Postal address 2 Drummond Street Town / City Edinburgh Postal code EH8 9XP State Country United Kingdom Email address d.t.milodowski@ed.ac.uk Phone Fax Name Simon Mudd Type of contact Model developer Institute / Organization University of Edinburgh, School of GeoSciences Postal address 1 Geography Building Postal address 2 Drummond Street Town / City Edinburgh Postal code EH8 9XP State Country United Kingdom Email address simon.m.mudd@ed.ac.uk Phone Fax Supported platforms Linux Other platform Programming language C++ Other program language Code optimized Single Processor Multiple processors implemented Nr of distributed processors Nr of shared processors Start year development 2012 Does model development still take place? Yes If above answer is no, provide end year model development 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/SurfaceRoughness Program license type GPL v2 Program license type other Memory requirements Memory requirements dependent on size of DEM Typical run time 1-30 minutes Describe input parameters The input file is a DEM in .flt format. A driver text file is also required which contains the parameters used for the extraction. Input format Other input format float Describe output parameters Output format Other output format Pre-processing software needed? No Describe pre-processing software Post-processing software needed? No Describe post-processing software Visualization software needed? No If above answer is yes Other visualization software Describe processes represented by the model This tool maps out local surface roughness based on the neighborhood distribution of surface normal vectors. As sediment transport processes in soil mantled landscapes tend to be diffusive, the emergence of bedrock drives an increase in surface roughness that is mapped out by this algorithm. Describe key physical parameters and equations The surface normal vector for a given pixel are defined by fitting a 6-term polynomial surface to a set of DEM points within a user-specified radius of that pixel. A second user-defined neighborhood is used to then map out the local variability in the orientation of the surface normal vectors. Describe length scale and resolution constraints A requirement is high resolution topographic data, typically ~1m resolution. For a detailed discussion of lengthscale and resolution constraints we urge the user to refer to the original manuscript Describe time scale and resolution constraints No time resolution constraints as this software performs topographic analysis. Describe any numerical limitations and issues Describe available calibration data sets Upload calibration data sets if available: Describe available test data sets Two test DEMs are included in the repository, alongside their respective driver files. These are used in the original manuscript. Upload test data sets if available: Describe ideal data for testing Any 1m resolution bare earth digital elevation model will do. Do you have current or future plans for collaborating with other researchers? Yes Is there a manual available? No Upload manual if available: Model website if any Model forum / discussion board Comments This part will be filled out by CSDMS staff OpenMI compliant No but possible BMI compliant No but possible WMT component No but possible PyMT component Is this a data component Can be coupled with:

Model info Authors David Milodowski Mudd Source code View in CSDMS GitHub repository Model citations Nr. of publications: 1 Total citations: 46 h-index: 1 m-quotient: 0.09 QR-code Link to this page Other models by author SurfaceRoughness

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Nr. of publications:	1
Total citations:	46
h-index:	1
m-quotient:	0.09

Featured publication(s)	Year	Model described	Type of Reference	Citations
Milodowski, D. T.; Mudd, S. M.; Mitchard, E. T. A.; 2015. Topographic roughness as a signature of the emergence of bedrock in eroding landscapes. Earth Surface Dynamics, 3, 483–499. 10.5194/esurf-3-483-2015 (View/edit entry)	2015	SurfaceRoughness	Model overview	46
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