Earth and Oceanographic Science

Ph.D., Colorado State University
M.S., Colorado State University
B.S., The College of William and Mary

Fields of Interest

Fluvial Geomorphology, Stream Rehabilitation, Environmental Geology, Earth Systems Science

Peer-Reviewed Publications

David, G.C.L., Yochum, S. E., Wohl, E., in preparation, Controls on bank roughness in high gradient streams, Fraser Experimental Forest, CO. Geomorphology.

David, G.C.L., Legleiter, C. J., Wohl, E., Yochum, S. E., in review, Understanding spatial variability in flow resistance using 3d acoustic Doppler velocimeter data. Geomorphology: Special Issue on Modelling Water-Erosion Processes with Geoinformatics.

Yochum, S.E., Bledsoe, B.P., David, G.C.L., Wohl, E., in review, Velocity prediction in high gradient mountain streams. Journal of Hydrology.

David, G.C.L., Wohl, E., Yochum, S.E., Bledsoe, B.P.,2011, Comparative analysis of bed resistance partitioning in high gradient streams. Water Resour. Res., 47, W07507, doi:10.1029/2010WR009540. (http://europa.agu.org/?view=article&uri=/journals/wr/wr1107/2010WR009540/2010WR009540.xml&t=wr,David)

David, G.C.L., Wohl, E., Yochum, S.E., Bledsoe, B.P., 2010, Controls on at-a-station hydraulic geometry of steep mountain streams. Earth Surface Processes and Landforms, 35, p. 1820 – 1837.  doi:10.1002/esp.2023. (http://onlinelibrary.wiley.com/doi/10.1002/esp.2023/abstract)    

David, G.C.L., Wohl, E., Yochum, S.E., and Bledsoe, B.P., 2010, Controls on spatial variations in flow resistance along steep mountain streams, Water Resour. Res., 46, W03513, doi:10.1029/2009WR008134. (http://europa.agu.org/?view=article&uri=/journals/wr/wr1003/2009WR008134/2009WR008134.xml&t=wr,David)

David, G.C.L., Bledsoe, B.P., Merritt, D.M. and Wohl, E., 2009, The impacts of ski slope development on stream channel morphology in the White River National Forest, CO, USA. Geomorphology 103, p. 375 – 388. (http://www.sciencedirect.com/science/article/pii/S0169555X08002973) 

Wohl, E. and David, G.C.L., 2008, Consistency of scaling relations among bedrock and alluvial channels. Journal of Geophysical Research – Earth Surface 113, F04013, doi:10.1029/2008JF000989, 16 pp. (http://europa.agu.org/?view=article&uri=/journals/jf/jf0804/2008JF000989/2008JF000989.xml&t=jf,2008,David) 

Theses and Other Publications

David, G.C.L., 2011, Characterizing flow resistance in high gradient streams, Fraser Experimental Forest, CO.  Ph.D. Dissertation, Colorado State University, Fort Collins, CO.

David, G.C.L., Wohl, E., Yochum, S.E., Bledsoe, B.P., 2010, Understanding controls on flow resistance along high gradient mountain streams.  Stream Notes, USDA Forest Service Rocky Mountain Research Station, Fort Collins, CO. 

David, G.C.L., 2009, Effects of ski slope development on stream channel morphology in Colorado. Stream Notes, USDA Forest Service Rocky Mountain Research Station, Fort Collins, CO, p. 5 – 7. 

David, G.C.L., 2008, Effects of ski slope development on stream channel morphology in Colorado.  Colorado Water Newsletter, The Water Center of Colorado State University, Fort Collins, CO, p. 20 – 22.

David, G., 2007, Impacts of ski slope development on stream channel morphology in the White River National Forest, CO. M.S. Thesis, Colorado State University, Fort Collins, CO.

David, G., 2002, Channel geometry changes in response to development in Williamsburg, VA.  B.S. Thesis, The College of William and Mary, Williamsburg, VA.

David, G.C.L., Wohl, E., Yochum, S.E., 2010, Relationship of bed and bank resistance to total flow resistance in a high gradient stream, Fraser Experimental Forest, Colorado, USA, Eos Trans. AGU, Fall Meeting Suppl., Abstract H31F-1077.  

Yochum, S.E. Bledsoe, B.P., David, G.C.L., Wohl, E., 2009, Characterization of flow resistance in high-gradient streams, Eos Trans. AGU, Fall Meeting Suppl., Abstract H11E-0879.

David, G.C., Yochum, S.E., Bledsoe, B.P., and Wohl, E., 2008, Characterizing flow resistance in step-pool, plane-bed and cascade reaches, Fraser Experimental Forest, Colorado, USA, Eos Trans. AGU, 89(53), Fall meet. suppl., Abstract H53B-1027.

Yochum, S.E. Bledsoe, B.P., David, G.C.L., Wohl, E., 2008, Characterization of reach velocity and detailed geometry in well-vegetated, high-gradient streams, Eos Trans. AGU, Fall meet suppl., Abstract H53B-1028.

David, G.C. and Wohl, E., 2007, Quantifying and partitioning roughness in mountain streams, Fraser Experimental Forest, Colorado USA, Eos Trans. AGU, 88(52), Fall meet. Suppl., Abstract H51E-0800.

David, G.C.L., 2006, Effects of snow-making, grading, and timber harvest on stream channel morphology in the White River National Forest, CO. Abstract, Soil and Water Conservation Society Annual Conference, Keystone, CO.

David, G.C., Bledsoe, B.P., Merritt, D.M., and Wohl, E., 2006, Effects of snow-making, grading, and timber harvest on stream channel morphology in the White River National Forest, CO. Abstract, AGU Hydrology Days, Fort Collins, CO.

David, G.C., Bledsoe, B.P., Merritt, D.M., and Wohl, E., 2005, Effects of snow-making, grading, and timber harvest on stream channel morphology in the White River National Forest, CO, Eos Trans. AGU, 86(52), Fall meet. Suppl., Abstract H53D-0502.

David, G.C., and Hancock, G.S., 2002, Stream channel geometry changes due to development in Williamsburg, Va, Abstract, National Conference for Undergraduate Research, Whitewater, WI.

My research focus is in the field of fluvial geomorphology, which is the study river channel forms and processes.  Rivers are fundamental agents of landscape change that move material over great distances from the mountains to the ocean.  Rivers are used for irrigation, transportation, drinking water, power production, and recreation.  My research attempts to understand how human changes to the landscape affect stream channels.  In particular, I have studied the effects of ski slope development on stream channels.  I have also worked at a smaller scale by studying the effects of individual boulders, wood, channel shape, and banks on stream flow. 

Most recently I have worked with the USDA Forest Service on a technical report about methods used to restore degraded, incised streams.  Channel incision is a concern throughout the world because of loss of land, particularly farmland, from erosion.  An incised channel can cause a drastic change in the landscape that can disrupt land used for agriculture, threaten adjacent structures, accelerate aridification of the land, and increase the production of sediment.  Additionally, an incised channel can cause changes in environmental conditions such as reducing water quality and increasing nutrient loads.

My next research project will investigate whether stream restoration projects improve the geomorphic and ecologic function of the channel and how these projects will be affected by changing climate.