Lithology

Create a Lithology object with different properties

lithologyerodibilitygeology

true

Contributor(s)

Initial contribute: 2021-09-06

Authorship

:  
University of Colorado Boulder
:  
katherine.barnhart@colorado.edu
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Classification(s)

Application-focused categoriesNatural-perspectiveLand regions
Application-focused categoriesIntegrated-perspectiveRegional scale

Detailed Description

English {{currentDetailLanguage}} English

Quote from:  https://joss.theoj.org/papers/10.21105/joss.00979

  The surface of the Earth reflects the competing advection of rock by tectonic processes and the erosion of rock by wind, water, and ice. Rock properties influence erosion rates by changing the processes responsible for erosion and the rate at which rock is weathered, detached, and turned into mobile sediment. Variations in the rock properties over space and with depth reflect the legacy of sedimentary deposition and tectonic deformation. Long-term landscape evolution modeling experiments that include the impact of spatially and temporally variable rock characteristics can be used to identify the impact of rock strength patterns on other geologic observables such as topography, erosion rates, and detrital mineral records (e.g., Forte, Yanites, & Whipple, 2016; Perne, Covington, Thaler, & Myre, 2017). Identifying these relationships allows for better interpretations of the geologic record.

  Landlab is an Open Source Python package that provides a framework for the development of 2D numerical models, typically in Earth surface dynamics (D. E. J. Hobley et al., 2017).    Landlab was designed as a modular framework in which different process components can be mixed and matched to construct a model based on a user’s needs. Prior work on spatially variable lithology in landscape evolution has been done using a modified version of the channel-hillslope integrated landscape development (CHILD, G. Tucker, Lancaster, Gasparini, & Bras, 2001) model (e.g., Forte et al., 2016) and the FastScape V5 model (Braun & Willett, 2013; Perne et al., 2017). To provide these capabilities within the Landlab framework, there is a need for a Landlab submodule that can treat spatial variations in rock materials.

  This contribution describes Lithology, a Landlab submodule designed to support the representation of 3D variations in rock material properties within the Landlab framework. It includes two classes: Lithology is a generic representation of spatially varying rock material, and LithoLayers is a derived class that treats parallel layers of material variations. In both classes, each rock type may have multiple attributes. Rock layers may be removed through erosion, or added to through deposition. Two options for the underlying datastructure are supported: “event layers”, in which the data structure stores each time-step as an event even if there is no material in the layer, or “material layers”, in which entries in the datastructure represent contiguous material of the same property, but not necessarily the same age. This second option is more memory efficient but does not record the transient dynamics of erosion and deposition.

  Source code for Lithology and Litholayers is available as part of the Landlab python package and can be found in the Lithology submodule. The Lithology submodule is documented using Docstrings, and the documentation can be found on the Landlab ReadTheDocs site. One page exists for the Lithology component and a second for the LithoLayers component. Unit and docstring tests provide 100% coverage of this submodule. Pull Request # 674 brought the Lithology submodule into the core Landlab source code. The first release version of Landlab that includes the Lithology submodule is tagged as v1.5.4. The concept DOI for Landlab is archived in Zenodo with the linked DOI: (E. Hutton et al., 2018) and the archive for this manuscript points to the Zenodo archive of v1.5.4.

  The Landlab project maintains a separate repository containing tutorials that introduce core concepts and the use of individual submodules. In addition to the source code, a Jupyter Notebook introducing the use of Lithology and Litholayers is now part of the Landlab tutorials repository. This tutorial was brought into the repository with Pull Request # 19. The first release version of the Landlab tutorials that includes this notebooks is tagged as v1.5.4 and is archived in Zenodo with the linked DOI: (Barnhart et al., 2018). 

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Katy Barnhart (2021). Lithology, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/0087a798-df9f-4f3e-b7d0-622c0fd65e71
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Contributor(s)

Initial contribute : 2021-09-06

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Authorship

:  
University of Colorado Boulder
:  
katherine.barnhart@colorado.edu
Is authorship not correct? Feed back

History

Last modifier
HaoCheng Wang
Last modify time
2021-09-18
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