A new approach for simulating the redistribution of soil particles by water erosion: A marker-in-cell model
Article first published online: 6 DEC 2012
©2012. American Geophysical Union. All Rights Reserved.
Journal of Geophysical Research: Earth Surface (2003–2012)
Volume 117, Issue F4, December 2012
How to Cite
2012), A new approach for simulating the redistribution of soil particles by water erosion: A marker-in-cell model, J. Geophys. Res., 117, F04027, doi:10.1029/2012JF002499., , , , , , , , and (
- Issue published online: 6 DEC 2012
- Article first published online: 6 DEC 2012
- Manuscript Accepted: 21 SEP 2012
- Manuscript Revised: 19 SEP 2012
- Manuscript Received: 24 MAY 2012
- sediment transport;
- soil erosion
 There are currently no process-based approaches that allow detailed spatial information on soil redistribution on hillslopes to be modeled at spatial scales that are appropriate for studying slope processes. In response, we developed a new type of soil-erosion model, a marker-in-cell model, which simulates the redistribution of soil during rainfall events. The model is a hybrid of cell- and particle-based techniques. A cell-based model is used to determine the hydrology and hydraulics occurring at the cellular scale on the hillslope. Markers, representing sediment, are then moved through the grid according to these properties. The spatial pattern of erosion is determined directly by the properties of the markers. The model allows two-dimensional spatial patterns of individual particle movement on a hillslope to be simulated within a computationally efficient framework. We have tested the model using data collected from a plot-scale, rainfall-simulation experiment. We measured the redistribution of137Cs-rich tracer soil to resolve the spatial patterns of erosion caused by a single, high-intensity, rainfall event. The model was able to recreate the key temporal and spatial aspects of the hydrology and hydraulics occurring on the plot, as well as the spatial redistribution of137Cs-rich tracer soil. The development of the model was used to probe our understanding of how to investigate soil-erosion processes. The lack of empirical underpinnings of the different model components highlighted the need to understand the spatiotemporal dynamics of soil erosion processes at the grain-scale so to provide a better process-based understanding of detachment and transport can be sought.