Model:Hilltop and hillslope morphology extraction

Hilltop and hillslope morphology extraction

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	Watershed-Scale, Reach-Scale
Model domain	Terrestrial
One-line model description	Tools for extracting hilltops and analysing hillslope morphology
Extended model description	A series of tools for extracting a network of hilltops from a landscape, computing curvature, slope and aspect over variable length scales from high resolution topography and performing hillslope traces from hilltops to valley bottoms to sample hilltop curvature, mean hillslope gradient and hillslope length. See Hurst et al. (2012) for full description.

Keywords:	topographic analysis,

Supported platforms	Unix, Linux, Windows
Other platform
Programming language	C++, Python
Other program language
Code optimized	Single Processor
Multiple processors implemented
Nr of distributed processors
Nr of shared processors
Start year development	2010
Does model development still take place?	No
If above answer is no, provide end year model development	2012
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/hilltop_and_hillslope_morphology_extraction
Program license type	GPL v3
Program license type other
Memory requirements	Dependent on DEM size
Typical run time	Days-Weeks!

Describe input parameters	See included readme
Input format
Other input format
Describe output parameters	See included readme
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?	Yes
If above answer is yes	ESRI
Other visualization software

Describe processes represented by the model	[[Describe processes::The module can be split into three processes. First computing topographic curvature (laplacian), slope and aspect from a gridded DEM over variable length scales to reduce local scale noise below the scale of interest (e.g. vegetation, boulders/rubble) (see Hurst et al. [2012] for further justification). Secondly, extraction of a network of hilltops as the intersecting margins of adjoining drainage basins at all stream orders through hydrological analysis of the DEM. Third, the use of the hilltop network to extract the spatial distribution of hillslope properties (hilltop curvature, mean hillslope gradient and hillslope length) by aspect driven steepest-descent tracing.]]
Describe key physical parameters and equations
Describe length scale and resolution constraints	Requires high resolution (1 m LiDAR) topographic data.
Describe time scale and resolution constraints
Describe any numerical limitations and issues	Dpeending on the size of the DEM this can be quite a slow process, particularly the third step.

Describe available calibration data sets
Upload calibration data sets if available:
Describe available test data sets	Db_dem.zip
Upload test data sets if available:
Describe ideal data for testing

Do you have current or future plans for collaborating with other researchers?	This code has been subsumed into a topographic analysis package being developed with Simon Mudd at the University of Edinburgh which may be available at a future date.

Is there a manual available?	No
Upload manual if available:
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Featured reference(s)	Open Access Status	Year	Type of Reference	Cited
Hurst, Martin D.; Mudd, Simon M.; Yoo, Kyungsoo; Attal, Mikael; Walcott, Rachel; 2013. Influence of lithology on hillslope morphology and response to tectonic forcing in the northern Sierra Nevada of California: LITHOLOGIC CONTROL ON HILLSLOPE RESPONSE. Journal of Geophysical Research: Earth Surface, 118832–851. 10.1002/jgrf.20049	cc-by · publishedVersion	2013	a module application description	82