Model:Hilltop flow routing

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Hilltop flow routing

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Summary Contact Technical specs In/Output Process Testing Other Component info Also known as Hillslope length measurement tool 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 Model domain One-line model description Algorithm for directly measuring hillslope length from high resolution topographic data Extended model description This tool produces a flow path for each hilltop pixel on a landscape, generating hillslope length and relief data at a hillslope scale. These data can be used to discriminate between linear and nonlinear sediment flux laws at a landscape scale. The model requires an input DEM in float format and produces a series raster and plain text output files which can be visualized and analysed using code provided at: https://github.com/sgrieve/LH_Paper_Plotting For detailed information about how to use this tool please refer to the documentation (http://www.geos.ed.ac.uk/~smudd/LSDTT_docs/html/basin_metrics.html). Keywords: geomorphology, Hillslope Model, Sediment flux, flow path, Name Stuart Grieve Type of contact Model developer Institute / Organization University of Edinburgh Postal address 1 Geography Building Postal address 2 Drummond Street Town / City Edinburgh Postal code EH8 9XP State Country United Kingdom Email address s.grieve@ed.ac.uk Phone +44 (0)131 650 9170 Fax Name Simon Mudd Type of contact Model developer Institute / Organization University of Edinburgh 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 +44 (0)131 651 9090 Fax Name Martin Hurst Type of contact Model developer Institute / Organization British Geological Survey Postal address 1 Keyworth Postal address 2 Town / City Postal code State Country United Kingdom Email address mhurst@bgs.ac.uk Phone Fax Supported platforms Unix, 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 2013 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 Program license type GPL v2 Program license type other Memory requirements Varies depending on the input DEM size Typical run time 3 hours to 3 days Describe input parameters The input files are a DEM in .flt format, a channel heads file generated using the DrEICH algorithm (http://csdms.colorado.edu/wiki/Model:DrEICH_algorithm) and an optional floodplain mask in .flt format. Input parameters are also supplied at the command line. Information on the parameters is available in the documentation (http://www.geos.ed.ac.uk/~smudd/LSDTT_docs/html/channel_heads.html). Input format Binary Other input format Describe output parameters The output data is both plain text data files and .flt raster files containing the spatial location of the computed results. Output format ASCII, Binary Other output format Pre-processing software needed? Yes Describe pre-processing software A channel network must be extracted for the landscape, this is performed using the DrEICH algorithm (http://csdms.colorado.edu/wiki/Model:DrEICH_algorithm). Post-processing software needed? No Describe post-processing software Visualization software needed? Yes If above answer is yes ESRI Other visualization software All output files can be visualized using the python tools provided at https://github.com/sgrieve/LH_Paper_Plotting and .flt files can be loaded into many GIS packages (ArcGIS, Whitebox, QGIS). Describe processes represented by the model The module generates hillslope profiles by routing flow from every point on a drainage divide into a channel. Describe key physical parameters and equations [[Describe key physical parameters::The user must select a drainage basin strahler order to use as the basis for generating drainage divides. The larger the value, the fewer profiles will be generated. A value of 2 is recommended in order to generate a large density of data, while ensuring that only true drainage divides are sampled. The window size for the surface fitting routine must be defined. The selection of this parameter is performed using an algorithm included in this package which implements a technique for window size selection described by Roering et al. (2010) [1] and Hurst et al. (2012) [2]]] Describe length scale and resolution constraints This algorithm attempts to measure individual hillslopes, which are can be resolved at a range of spatial scales. It is recommended to use high resolution topographic data (<4 meter resolution) to ensure that a broad range of hillslopes can be sampled. Describe time scale and resolution constraints No time resolution constraints as this software performs topographic analysis. Describe any numerical limitations and issues As the size of the DEM increases, processing time will increase. An 8000*8000 DEM will take several days to process. Documentation is available to help users select appropriate input parameters. Describe available calibration data sets Topographic analysis; no calibration required. Upload calibration data sets if available: Describe available test data sets Input data used in the preparation of the associated manuscript is all available from www.opentopography.org along with all processing and visualization code at https://github.com/sgrieve/LH_Paper_Plotting so users can compare their results with those contained within the manuscript. Upload test data sets if available: Describe ideal data for testing Any 1m resolution digital elevation model. 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 http://www.geos.ed.ac.uk/~smudd/LSDTT_docs/html/basin_metrics.html Model forum / discussion board Comments This part will be filled out by CSDMS staff OpenMI compliant No not possible BMI compliant No not 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 Can be coupled with:

Model info Authors Stuart Grieve Mudd, Hurst Source code View in CSDMS GitHub repository Model citations Nr. of publications: 1 Total citations: 68 h-index: 1 m-quotient: 0.1 QR-code Link to this page Other models by author Hilltop flow routing

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