The Landlab v1.0 OverlandFlow component: a Python tool for computing shallow-water flow across watersheds
-
Published:2017-04-20
Issue:4
Volume:10
Page:1645-1663
-
ISSN:1991-9603
-
Container-title:Geoscientific Model Development
-
language:en
-
Short-container-title:Geosci. Model Dev.
Author:
Adams Jordan M.ORCID, Gasparini Nicole M., Hobley Daniel E. J.ORCID, Tucker Gregory E.ORCID, Hutton Eric W. H., Nudurupati Sai S.ORCID, Istanbulluoglu Erkan
Abstract
Abstract. Representation of flowing water in landscape evolution models (LEMs) is often simplified compared to hydrodynamic models, as LEMs make assumptions reducing physical complexity in favor of computational efficiency. The Landlab modeling framework can be used to bridge the divide between complex runoff models and more traditional LEMs, creating a new type of framework not commonly used in the geomorphology or hydrology communities. Landlab is a Python-language library that includes tools and process components that can be used to create models of Earth-surface dynamics over a range of temporal and spatial scales. The Landlab OverlandFlow component is based on a simplified inertial approximation of the shallow water equations, following the solution of de Almeida et al.(2012). This explicit two-dimensional hydrodynamic algorithm simulates a flood wave across a model domain, where water discharge and flow depth are calculated at all locations within a structured (raster) grid. Here, we illustrate how the OverlandFlow component contained within Landlab can be applied as a simplified event-based runoff model and how to couple the runoff model with an incision model operating on decadal timescales. Examples of flow routing on both real and synthetic landscapes are shown. Hydrographs from a single storm at multiple locations in the Spring Creek watershed, Colorado, USA, are illustrated, along with a map of shear stress applied on the land surface by flowing water. The OverlandFlow component can also be coupled with the Landlab DetachmentLtdErosion component to illustrate how the non-steady flow routing regime impacts incision across a watershed. The hydrograph and incision results are compared to simulations driven by steady-state runoff. Results from the coupled runoff and incision model indicate that runoff dynamics can impact landscape relief and channel concavity, suggesting that, on landscape evolution timescales, the OverlandFlow model may lead to differences in simulated topography in comparison with traditional methods. The exploratory test cases described within demonstrate how the OverlandFlow component can be used in both hydrologic and geomorphic applications.
Funder
Division of Advanced Cyberinfrastructure
Publisher
Copernicus GmbH
Reference69 articles.
1. Adams, J. M.: GitHub Repository: OverlandFlow example drivers and documentation, https://doi.org/10.5281/zenodo.162058, 2016. 2. Adams, J. M., Nudurupati, S. S., Gasparini, N. M., Hobley, D. E., Hutton, E. W. H., Tucker, G. E., and Istanbulluoglu, E.: Landlab: Sustainable software development in practice, Second Workshop on Sustainable Software for Science: Practice and Experiences (WSSSPE2), New Orleans, LA, USA, https://doi.org/10.6084/m9.figshare.1097629, 2014. 3. Adams, J. M., Gasparini, N. M., Hobley, D. E., Tucker, G. E., Hutton, E. W. H., Nudurupati, S. S., and Istanbulluoglu, E.: Flooding and erosion after the Buffalo Creek fire: a modeling approach using Landlab, Presented at the Geological Society of America Annual Meeting, Denver, CO, USA, 2016. 4. Aksoy, H. and Kavvas, M.: A review of hillslope and watershed scale erosion and sediment transport models, Catena, 64, 247–271, https://doi.org/10.1016/j.catena.2005.08.008, 2005. 5. Anders, A. M., Roe, G. H., Montgomery, D. R., and Hallet, B.: Influence of precipitation phase on the form of mountain ranges, Geology, 36, 479–482, https://doi.org/10.1130/G24821A.1, 2008.
Cited by
33 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|