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A sediment transport model for incision of gullies on steep topography


Istanbulluoglu, Erkan; Tarboton, David G.; Pack, Robert T.; Luce, Charles H. 2003. A sediment transport model for incision of gullies on steep topography. Water Resources Research. 39(4): 1103-1117.

We have conducted surveys of gullies that developed in a small, steep watershed in the Idaho Batholith after a severe wildfire followed by intense precipitation. We measured gully length and cross sections to estimate the volumes of sediment loss due to gully formation. These volume estimates are assumed to provide an estimate of sediment transport capacity at each survey cross section from the single gully-forming thunderstorm. Sediment transport models commonly relate transport capacity to overland flow shear stress, which is related to runoff rate, slope, and drainage area. We have estimated the runoff rate and duration associated with the gully-forming event and used the sediment volume measurements to calibrate a general physically based sediment transport equation in this steep, high shear stress environment.

Keywords: gully erosion, sediment transport, landscape evolution


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Title: RMRS Other Publications: A sediment transport model for incision of gullies on steep topography
Electronic Publish Date: January 14, 2004
Expires: Indefinite
Last Update:
January 14, 2004

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