The Complex Materials and Nonlinear Physics Laboratory at
Clark University

High Magnetic Field - Low Temperature Lab

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Geomorphology

Department of Physics

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Geomorphology: Physics of Channelization
Data Sets (Movies and Images)

Larger Image Larger Image Above: Surface of Granular Wedge Calculated from Laser Topography


We perform laboratory scale experiments to study the physical processes behind channel erosion and drainage networks. The experimental setup is seen below. A wedge of sand (0.5 mm glass particles) is formed. A constant flow of water through the wedge is created by a water tank at the back. The water pressure is either set at a level where spontaneous channels form on the surface, or at a slightly lower pressure and a single initial channel is incised. By scanning the surface of the granular bed with a laser line, and recording these images with a CCD camera, quantitative height information can be calculated and the time evolution of the system can be studied. An example of an image rendered from this height information can be seen above and movies of the time evolution of channels can be seen in the Data Sets section.

Below: Experimental Setup
Larger Image

Related Publications
  1. "Dynamics of channel incision in a granular bed driven by subsurface water flow,'' A. E. Lobkovsky, B. E. Smith, A. Kudrolli, and D. H. Rothman, J. Geophys. Res., 112, F03S12 (2007) cond-mat/0505352.
  2. "Threshold phenomena in erosion driven by subsurface flow,'' A. E. Lobkovsky, B. Jensen, A. Kudrolli, and D. H. Rothman, Journal of Geophysical Research - Earth Surface, (accepted) preprint
  3. "Spontaneous channelization in permeable ground: Theory, experiment, and observation," N. Schorghofer, B. Jensen, A. Kudrolli, and D.H. Rothman, Journal of Fluid Mechanics, 503, 357-374 (2004). preprint

Contributors to the work on the page include:
Braunen Smith and Arshad Kudrolli, Clark University
Alexander Lobkovsky and Daniel Rothman, MIT

This project is funded by the Department of Energy.


Contact:
Braunen Smith

Department of Physics
Clark University
Worcester, MA 01610
Phone: (508)793-7680

Last updated March 5, 2008.