Oregon State University

College of Earth, Ocean, and Atmospheric Sciences

Directory of People

Stephen T. Lancaster

Stephen Lancaster photo
Associate Professor
Discipline: Geology and Geophysics
Office: Wilkinson 142
Phone: 541-737-9258
Fax: 541-737-1200
Email: lancasts@geo.oregonstate.edu
Vita or Résumé (PDF)


Fluvial geomorphology, hydrology

Research Interests

Debris flows, sediment budgets, river migration, landscape evolution, surface-groundwater interactions, forest-geomorphic-hydrologic interactions.


AB Physics, Harvard University, 1990
PhD Hydrology, Massachusetts Institute of Technology, 1998


Associate Editor, 2009-present
Journal of Geophysical Research - Earth Surface

Associate Director for Water Resources Engineering, 2009-present
Water Resources Graduate Program, Oregon State University

Associate Professor, 2007-present
Dept. Geosciences, Oregon State University

Assistant Professor, 2001-2007
Dept. Geosciences, Oregon State University

Research Associate, 1998-2001
Dept. Geosciences, Oregon State University


GEO 309 - Environmental Justice
GEO 322 - Surface Processes
GEO 432/532 - Applied Geomorphology
GEO 582 - Geomorphology of Forests and Streams

Graduate Students

Likun Chen, MS Geography, in progress

John Zunka, MS Water Resources Engineering, in progress

Rose Wallick, PhD Geology, in progress

W. Terry Frueh, PhD Water Resources Engineering, in progress

Graysen Squeochs, MS Water Resource Science, in progress

Emily Underwood, MS Geology, 2007
Sediment Transfer and Storage in Headwater Basins of the Oregon Coast Range: Transit Times from 14C Dated Deposits.

Anne Jefferson, PhD Geology, 2006
Hydrology and Geomorphic Evolution of Basaltic Landscapes, High Cascades, Oregon.

Kevin Farthing, MS Environmental Engineering, 2006
Temperature Effects of Hyporheic Flow

Jennifer Rose Wallick, MS Geology and Bioresource Engineering, 2004
Geology, Flooding and Human Activities: Establishing a Hierarchy of Controls on Historical Channel Change, Willamette River, Oregon.

Nathan Casebeer, MS Geology, 2004
Sediment Storage in a Headwater Valley of the Oregon Coast Range: Erosion Rates and Styles, and Capacitance of the Valley Floor.

Surface Processes Research Group Website


Lancaster, S.T., E.F. Underwood, and W.T. Frueh, 2010. Sediment reservoirs at mountain stream confluences: Dynamics and effects of tributaries dominated by debris flow and fluvial processes. Geological Society of America Bulletin, 122(11/12), 1775-1786, doi: 10.1130/B30175.1.

Jefferson, A., G.E. Grant, S.L. Lewis, and S.T. Lancaster, 2010. Coevolution of hydrology and topography on a basalt landscape in the Oregon Cascade Range, USA. Earth Surface Processes and Landforms, 35, 803-816, DOI: 10.1002/esp.1976, published online: Jan 28 2010.

Lancaster, S.T., 2008. Evolution of sediment accommodation space in steady-state bedrock-incising valleys subject to episodic aggradation. Journal of Geophysical Research, 113, F04002, doi:10.1029/2007JF000938.

Lancaster, S.T. and Casebeer, N.E., 2007. Sediment storage and evacuation in headwater valleys at the transition between debris-flow and fluvial processes. Geology, 35(11), 1027-1030.

Wallick, J.R., G.E. Grant, S.T. Lancaster, J.P. Bolte, and R.P. Denlinger, 2007. Patterns and controls on historical channel change in the Willamette River, Oregon, USA, in Large Rivers: Geomorphology and Management, edited by A. Gupta, pp. 491-516, John Wiley & Sons, Hoboken.

Clevis, Q., G.E. Tucker, G. Lock, S.T. Lancaster, N. Gasparini, A. Desitter, and R.L. Bras, 2006. Geoarchaeological simulation of meandering river deposits and settlement distributions: A three-dimensional approach, Geoarchaeology: An International Journal, 21(8), 843-874, doi:10.1002/gea.20142.

Wallick, J.R., S.T. Lancaster, and J.P. Bolte, 2006. Determination of bank erodibility for natural and anthropogenic bank materials using a model of lateral migration & observed erosion along the Willamette River, Oregon, USA, River Research and Applications, 22(6), 631-649, DOI: 10.1002/rra.925.

Clevis, Q, G.E. Tucker, S.T. Lancaster, A. Desitter, N. Gasparini, and G. Lock, 2006. A simple algorithm for the mapping of TIN data onto a static grid: Applied to the stratigraphic simulation of river meander deposits. Computers & Geosciences, 32(6), 749-766, doi:10.1016/j.cageo.2005.05.012.

Lancaster, S.T., and G.E. Grant, 2006. Debris dams and the relief of headwater streams, Geomorphology, 82 (special issue on bedrock rivers, edited by P.A. Carling), 84-97, doi:10.1016/j.geomorph.2005.08.020.

Lancaster, S.T., S.K. Hayes, and G.E. Grant, 2003. Effects of wood on debris flow runout in small mountain watersheds, Water Resources Research, 39(6), 1168, doi:10.1029/2001WR001227.

Lancaster, S.T., and G.E. Grant, 2003. You want me to predict what? in Prediction in Geomorphology, edited by P.R. Wilcock and R.M. Iverson, pp. 41-50 (DOI: 10.1029/135GM04), American Geophysical Union, Washington.

Lancaster ST and Bras RL, 2002. A simple model of river meandering and its comparison to natural channels, Hydrological Processes, 16, 1-26.

Lancaster, S.T., S.K. Hayes, and G.E. Grant, 2001. Modeling sediment and wood storage and dynamics in small mountainous watersheds, in Geomorphic Processes and Riverine Habitat, J.M. Dorava, D.R. Montgomery, B.B. Palcsak, and F.A. Fitzpatrick (eds.), pp. 85-102, American Geophysical Union, Washington.

Tucker, G.E., S.T. Lancaster, N.M. Gasparini, R.L. Bras, and S.M. Rybarczyk, 2001. An object-oriented framework for hydrologic and geomorphic modeling using triangulated irregular networks, Computers and Geosciences, 27(8), 959-973.