Paul Grams, Ph.D.

I am a geomorphologist and mangage a set of projects collectively called the River Geomorphology and Geomorphic Change project at the US Geological Survey Grand Canyon Monitoring and Research Center. These include a range of studies that describe, quantify, and predict geomorphic change, mostly on large rivers in the western United States. 

Biography

Paul Grams received a BA in Geology from Middlebury College (1991), an M.S. in Geology from Utah State University (1997), and a Ph.D. in Geography and Environmental Engineering from Johns Hopkins University (2006). For an undergraduate thesis, Paul examined the effects of Hells Canyon Dam on the hydrology and downstream physical resources of the Snake River, in Idaho. Since that time he has studied the interaction between human-induced changes in hydrology and channel form on many segments of the Green River in Utah and Colorado, small streams in northern Utah and southern Idaho, and the Colorado River in Grand Canyon. Paul’s current research interests are in fluvial geomorphology, sediment transport, the downstream effects of dams and diversions, and the connections between physical processes and ecological systems on large rivers. Paul is currently a research hydrologist at the Grand Canyon Monitoring and Research Center and manages several projects related to geomorphology, sediment budgets, and the effects of controlled floods on the Colorado River in Grand Canyon and in other parts of the Colorado River Basin.

Geomorphology at Grand Canyon Monitoring and Research Center

Sandbar monitoring web application

Profile on Google Scholar

Current Research Projects

1.      Sandbar dynamics on the Colorado River in Grand Canyon

Since the completion of Glen Canyon Dam in 1963, the amount of sand supplied to Grand Canyon National Park has been reduced by more than 90 percent. The Paria River, a tributary to the Colorado River 15 miles downstream from the dam, is now the single most important supplier of sand to the Colorado River within the Park. This large reduction in sand supply has resulted in substantial decrease in the number and size of sandbars. Sandbars are important because they serve as campsites for river runner and hikers, provide important aquatic and riparian habitats, and are the source of sand that may help protect archaeological sites. The information collected by this project will be used to determine whether dam operations, including High-flow Experiments, cause increases or decreases in sandbars and associated campsites in Grand Canyon National Park.

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This photograph shows a sandbar deposited by the March 2008 HIgh-flow Experiment that was conducted on the Colorado River in Grand Canyon, downstream from Glen Canyon Dam. View is looking upstream.

(Photo by Matt Kaplinski, Northern Arizona University.)

Select Publications:

Quantifying geomorphic and vegetation change at sandbar campsites in response to flow regulation and controlled floods, Grand Canyon National Park, Arizona, in River Research and Applications, 2018.

Variability in eddy sandbar dynamics during two decades of controlled flooding of the Colorado River in the Grand Canyon, in Sedimentary Geology, 2018.

Automated Remote Cameras for Monitoring Alluvial Sandbars on the Colorado River in Grand Canyon, Arizona, USGS Open-file Report, 2018.

Building Sandbars in the Grand Canyon, in EOS Transactions of the American Geophysical Union, 2015.

2.      Long-term monitoring of sediment storage in the Colorado River in Grand Canyon

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Visualization of map of riverbed and canyon walls near Navajo Bridge, 4.5 miles downstream from Lees Ferry, Arizona. River bathymetry was measured with multibeam sonar and topography was measured with a boat-mounted laser scanner. The data from this survey collected in April 2016 will be used to measure changes in sand storage on the river bed and to model streamflow and sand transport.

(Public domain.)

The purpose of this project is to monitor sediment storage on the bed and banks of the Colorado River for the 285-mile segment of the river between Glen Canyon Dam and Lake Mead. Because of the spatial scale and geomorphic complexity, this is a unique effort in river monitoring that requires integration and analysis of multiple data sources, which include multibeam sonar, singlebeam sonar, conventional survey, aerial photography, and LIDAR. The goal of this work is to improve scientific understanding of the linkages between river sediment budgets and changes in river channel morphology. This work is of relevance to river managers and stakeholders who seek to understand and manage fish habitat, river bed composition and dynamics as they relate to primary productivity, riparian environments, and river-related recreation resources.

Select Publications: 

How many measurements are required to construct an accurate sand budget in a large river? Insights from analyses of signal and noise, in Earth Surface Processes and Landforms, 2019.

Compositional signatures in acoustic backscatter over vegetated and unvegetated mixed sand-gravel riverbeds, in JGR Earth Surface, 2017.

Linking morphodynamic response with sediment mass balance on the Colorado River in Marble Canyon: Issues of scale, geomorphic setting, and sampling design, in JGR Earth Surface, 2013.

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Sand dunes on the bed of the Colorado River near Diamond Creek, Arizona. Image is derived from a 10-cm resolution digital elevation model constructruced from bathymetry measured by multibeam sonar.

(Public domain.)

3.      Streamflow and sediment-transport modeling in the Colorado River

The purpose of this project is to support the development and use of numerical models for streamflow and sediment transport in the Colorado River in Grand Canyon. The purpose of these models is to provide managers with tools they may use to predict how management actions affect sediment resources in Grand Canyon. These models have been used by the Dept. of Interior to plan high-flow experiments and design annual plans for dam operations. 

Select Publications:

A Detached Eddy Simulation Model for the Study of Lateral Separation Zones along a Large Canyon-Bound River, in JGR Earth Surface, 2017.

Transport of fine sediment over a coarse, immobile riverbed, in JGR Earth Surface, 2014.

4.      Geomorphic Studies on the Green and Colorado Rivers in Canyonlands National Park and Dinosaur National Monument

The goal of this project is to develop an integrated understanding of how streamflow regulation, natural and controlled floods, and sediment supply interact with local geomorphic organization to influence river channel form, fish habitat, and riparian vegetation. This project is important to resource managers who seek information to anticipate the effects of climate change and potential future water development on river-related park resources.

Select Publications:

The influence of controlled floods on fine sediment storage in debris fan-affected canyons of the Colorado River basin, in Geomorphology, 2014.

Streamflow regulation and multi-level flood plain formation: Channel narrowing on the aggrading Green River in the eastern Uinta Mountains, Colorado and Utah, in Geomorphology, 2002.

5.      Geomorphic Resonse to the 2014 Pulse Flow in the Colorado River Delta

The purpose of this project is to document the streamflow, sediment transport conditions, and geomorphic response of the spring 2014 pulse flow on the lower Colorado River released as part of Minute 319 of the United States-Mexico Treaty. The pulse flow was released to provide environmental benefits to the normally dry riparian corridor and reporting on the effects of the release is a Department of Interior priority. Collaborators include Erich Mueller and David Topping (USGS GCMRC); Patric Shafroth (USGS Fort Collins); and Jack Schmidt (Utah State University).

Geomorphic change and sediment transport during a small artificial flood in a transformed post-dam delta: The Colorado River delta, United States and Mexico, in Ecological Engineering, 2017.

Complete List of Publications (1990-2018):

Grams, P.E., Buscombe, D., Topping, D.J., Kaplinski, M., Hazel, Joseph E., J., 2019. How many measurements are required to construct an accurate sand budget in a large river? Insights from analyses of signal and noise. Earth Surf. Process. Landforms. doi:10.1002/esp.4489.

Topping, D.J., Mueller, E.R., Schmidt, J.C., Griffiths, R.E., Dean, D.J., Grams, P.E., 2018. Long-Term Evolution of Sand Transport Through a River Network: Relative Influences of a Dam Versus Natural Changes in Grain Size From Sand Waves. J. Geophys. Res. Earth Surf. 1879–1909. doi:10.1029/2017JF004534.

Sankey, J.B., Chain, G.R., Solazzo, D., Durning, L.E., Bedford, A., Grams, P.E., Ross, R.P., 2018. Sand classifications along the Colorado River in Grand Canyon derived from 2002, 2009, and 2013 high-resolution multispectral airborne imagery. U.S. Geol. Surv. data release. doi:doi.org/10.5066/P99TN424.

Mueller, E.R., Grams, P.E., Hazel, J.E., and Schmidt, J.C., 2018, Variability in eddy sandbar dynamics during two decades of controlled flooding of the Colorado River in the Grand Canyon: Sedimentary Geology, v. 363, p. 181–199, doi:10.1016/j.sedgeo.2017.11.007.

Kasprak, A., Sankey, J.B., Buscombe, D.D., Caster, J., East, A., Grams, P., 2018. River Valley Sediment Connectivity Data, Colorado River, Grand Canyon, Arizona. U.S. Geol. Surv. data release. doi:doi.org/10.5066/P9SX3MGY.

Kasprak, A., Sankey, J.B., Buscombe, D., Caster, J., East, A.E., Grams, P.E., 2018. Quantifying and forecasting changes in the areal extent of river valley sediment in response to altered hydrology and land cover. Prog. Phys. Geogr. doi:10.1177/0309133318795846.

Hadley, D.R., Grams, P.E., Kaplinski, M.A., 2018. Quantifying geomorphic and vegetation change at sandbar campsites in response to flow regulation and controlled floods , Grand Canyon National Park , Arizona. River Res. Appl. 1–11. doi:10.1002/rra.3349.

Hadley, D.R., Kaplinski, M.A., Hazel, J.E., J., Gushue, T.M., Ross, R.P., Grams, P.E., Parnell, R.A., 2018. Geomorphology and campsite data, Colorado River, Marble and Grand Canyons, Arizona. U.S. Geol. Surv. data release. doi:10.5066/F7FJ2FQQ.

Hadley, D.R., Grams, P.E., Kaplinski, M.A., Hazel, J.E., J., Parnell, R.A., 2018. Geomorphology and vegetation change at Colorado River campsites, Marble and Grand Canyons, Arizona. U.S. Geol. Surv. Sci. Investig. Rep. 2017–5096 64. doi:10.3133/sir20175096.

Grams, P.E., Tusso, R.B., Buscombe, D., 2018. Automated Remote Cameras for Monitoring Alluvial Sandbars on the Colorado River in Grand Canyon, Arizona. U.S. Geol. Surv. Open-File Rep. 2018-1019 61. doi:10.3133/ofr20181019.

Vanderkooi, S.P., Kennedy, T.A., Topping, D.J., Grams, P.E., Ward, D.L., Fairley, H.C., Bair, L.S., Sankey, J.B., Yackulic, C.B., Schmidt, J.C., 2017. Scientific monitoring plan in support of the selected alternative of the Glen Canyon Dam Long-Term Experimental and Management Plan. U.S. Geol. Surv. Open-File Rep. 2017-1006 18. doi:10.3133/ofr20171006.

Kaplinski, M., Hazel, Joseph E., J., Grams, P.E., Kohl, K., Buscombe, D.D., Tusso, R.B., 2017. Channel Mapping of the Colorado River in Grand Canyon National Park, Arizona - May 2009, river miles 29 to 62—Data: U.S. Geological Survey data release, https://dx.doi.org/10.5066/F7930RCG.

Kaplinski, M., Hazel, Joseph E., J., Grams, P.E., Kohl, K., Buscombe, D.D., Tusso, R.B., 2017. Channel Mapping River Miles 29 – 62 of the Colorado River in Grand Canyon National Park , Arizona , May 2009. U.S. Geol. Surv. Open-File Rep. 2017-1030 35 p. doi:10.3133/ofr20171030.

Buscombe, D., Grams, P.E., & Kaplinski, M. A., 2017, Compositional signatures in acoustic backscatter over vegetated and unvegetated mixed sand-gravel riverbeds. Journal of Geophysical Research: Earth Surface, 122, 1771–1793, doi:10.1002/2017JF004302.

Buscombe, D., Grams, P.E., & Kaplinski, M. A., 2017, Acoustic backscatter—Data and Python code. U.S. Geological Survey data release. Reston, VA: U.S. Geological Survey. https://doi.org/10.5066/F7B56HM0.

Mueller, E.R., Schmidt, J.C., Topping, D.J., Shafroth, P.B., Rodríguez-Burgueño, J.E., Ramírez-Hernández, J., Grams, P.E., 2017, Geomorphic change and sediment transport during a small artificial flood in a transformed post-dam delta: The Colorado River delta, United States and Mexico. Ecol. Eng. 106, 757–775. doi:10.1016/j.ecoleng.2016.08.009.

Alvarez, L.V., Schmeeckle, M.W., Grams, P.E., 2017, A Detached Eddy Simulation Model for the Study of Lateral Separation Zones along a Large Canyon-Bound River, Journal of Geophysical Research: Earth Surface, v. 122, p. 25–49, doi:10.1002/2016JF003895.

Hamill, D., Wheaton, J.M., Buscombe, D., Grams, P.E., Melis, T.S., 2016. Bed texture mapping in large rivers using recreational-grade sidescan sonar, in: Constantinescu, Garcia, M., Hanes, D. (Eds.), River Flow 2016, Proceedings of the International Conference on Fluvial Hydraulics. Taylor & Francis Group, London, pp. 306–311. doi:10.1201/9781315644479-51.

Buscombe, D., Grams, P.E., 2016. Stochasticity of riverbed backscattering, with implications for acoustical classification of non-cohesive sediment using multibeam sonar, in: Constantinescu, Garcia, M., Hanes, D. (Eds.), River Flow 2016, Proceedings of the International Conference on Fluvial Hydraulics. Taylor & Francis Group, London, pp. 1496–1502. doi:10.1201/9781315644479-236.

Grams, P.E., Schmidt, J.C., Wright, S.A., Topping, D.J., Melis, T.S., and Rubin, D.M., 2015, Building Sandbars in the Grand Canyon. EOS, Trans. Am. Geophys. Union, 96(11), 12–16, doi:10.1029/2015EO030349.

Buscombe, D., P. E. Grams, and S. M. C. Smith (2015), Automated Riverbed Sediment Classification Using Low-Cost Sidescan Sonar, J. Hydraul. Eng., 06015019, doi:10.1061/(ASCE)HY.1943-7900.0001079.

Sankey, J.B., Ralston, B.E., Grams, P.E., Schmidt, J.C., and Cagney, L.E., 2015, Riparian vegetation, Colorado River, and climate--Five decades of spatiotemporal dynamics in the Grand Canyon with river regulation: J. Geophys. Res. Biogeosci., 120, 1532–1547, doi:10.1002/2015JG002991.

Buscombe, D., P. E. Grams, M. A. Kaplinski, R. Tusso, and D. M. Rubin (2015), Hydroacoustic signatures of Colorado riverbed sediments in Marble and Grand Canyons using multibeam sonar, in Proceedings of the 5th Federal Interagency Hydrologic Modeling Conference and the 10th Federal Interagency Sedimentation Conference, pp. 1066–1077, Reno, Nev. http://acwi.gov/sos/pubs/3rdJFIC/index.html

Buscombe, D., P. E. Grams, T. S. Melis, and S. M. C. Smith (2015), Large river bed sediment characterization with low-cost sidescan sonar: Case studies from two settings in the Colorado (Arizona) and Penobscot (Maine) Rivers, in Proceedings of the 5th Federal Interagency Hydrologic Modeling Conference and the 10th Federal Interagency Sedimentation Conference, pp. 1273–1277, Reno, Nev. http://acwi.gov/sos/pubs/3rdJFIC/index.html

Grams, P. E., D. Buscombe, D. J. Topping, J. E. J. Hazel, and M. Kaplinski (2015), Use of flux and morphologic sediment budgets for sandbar monitoring on the Colorado River in Marble Canyon, Arizona, in Proceedings of the 5th Federal Interagency Hydrologic Modeling Conference and the 10th Federal Interagency Sedimentation Conference, pp. 1144–1155, Reno, Nev. http://acwi.gov/sos/pubs/3rdJFIC/index.html

Mueller, E. R., J. C. Schmidt, D. J. Topping, and P. E. Grams (2015), Geomorphic change in the limitrophe reach of the Colorado River in response to the 2014 delta pulse flow, United States and Mexico, in Proceedings of the 5th Federal Interagency Hydrologic Modeling Conference and the 10th Federal Interagency Sedimentation Conference, pp. 1501–1512, Reno, Nev. http://acwi.gov/sos/pubs/3rdJFIC/index.html

Ross, R. P., and P. E. Grams (2015), Long-term monitoring of sandbars on the Colorado River in Grand Canyon using remote sensing, in Proceedings of the 5th Federal Interagency Hydrologic Modeling Conference and the 10th Federal Interagency Sedimentation Conference, pp. 86–96, Reno, Nev. http://acwi.gov/sos/pubs/3rdJFIC/index.html

Tusso, R. B., D. Buscombe, and P. E. Grams (2015), Using oblique digital photography for alluvial sandbar monitoring and low-cost change detection, in Proceedings of the 5th Federal Interagency Hydrologic Modeling Conference and the 10th Federal Interagency Sedimentation Conference, pp. 79–85, Reno, Nev. http://acwi.gov/sos/pubs/3rdJFIC/index.html

Mueller, E. R., P. E. Grams, J. C. Schmidt, J. Hazel, Joseph E., M. Kaplinski, J. A. Alexander, and K. Kohl (2014), Monitoring and Research to Describe Geomorphic Effects of the 2011 Controlled Flood on the Green River in the Canyon of Lodore , Dinosaur National Monument , Colorado and Utah, U.S. Geological Survey Scientific Investigations Report 2014-5022. https://pubs.er.usgs.gov/publication/sir20145022

Buscombe, D., P. E. Grams, and M. A. Kaplinski (2014), Journal of Geophysical Research: Earth Surface, Characterizing riverbed sediment using high-frequency acoustics: 1. Spectral properties of scattering, 119, 2674–2691, doi:10.1002/2014JF003189.

Buscombe, D., P. E. Grams, and M. A. Kaplinski (2014), Journal of Geophysical Research: Earth Surface Characterizing riverbed sediment using high-frequency acoustics: 2. Scattering signatures of Colorado River bed sediment in Marble and Grand Canyons, 119, 2692–2710, doi:10.1002/2014JF003191.In.

Mueller, E. R., P. E. Grams, J. C. Schmidt, J. E. Hazel, J. S. Alexander, and M. Kaplinski (2014), The influence of controlled floods on fine sediment storage in debris fan-affected canyons of the Colorado River basin, Geomorphology, 226, 65–75, doi:10.1016/j.geomorph.2014.07.029.

Grams, P.E., and P. R. Wilcock, 2013, Transport of fine sediment over a coarse, immobile river bed, Journal of Geophysical Research: Earth Surface, 2013JF002925.

Grams, P. E., D. J. Topping, J. C. Schmidt, J. E. Hazel Jr., and M. Kaplinski, 2013, Linking morphodynamic response with sediment mass balance on the Colorado River in Marble Canyon: Issues of scale, geomorphic setting, and sampling design, J. Geophys. Res. Earth Surf., 118, 361–381, doi:10.1002/jgrf.20050. http://onlinelibrary.wiley.com/doi/10.1002/jgrf.20050/full

Grams P. E., 2013, A sand budget for Marble Canyon, Arizona--implications for long-term monitoring of sand storage change, U.S. Geological Survey Fact Sheet 2013–3074, 4 p., http://pubs.usgs.gov/fs/2013/3074/.

Kennedy, T. A., Yackulic, C. B., Cross, W. F., Grams, P.E., Yard, M. D. and Copp, A. J., 2013, The relation between invertebrate drift and two primary controls, discharge and benthic densities, in a large regulated river. Freshwater Biology. doi: 10.1111/fwb.12285

Ross, R., and Grams, P.E., 2013, Nearshore thermal gradients of the Colorado River near the Little Colorado River confluence, Grand Canyon National Park, Arizona, 2010: U.S. Geological Survey Open-File Report 2013–1013, 65 p. http://pubs.usgs.gov/of/2013/1013/.

Schmidt, J.C. and Grams, P.E., 2011, Chapter 2: Understanding Physical Processes of the Colorado River in Melis, T. S., ed., 2011, Effects of three high-flow experiments on the Colorado River ecosystem downstream from Glen Canyon Dam, Arizona: U.S. Geological Survey Circular 1366, 147 p. https://pubs.usgs.gov/circ/1366/

Schmidt, J.C. and Grams, P.E., 2011, Chapter 3: The High Flows—Physical Science Results in Melis, T. S., ed., 2011, Effects of three high-flow experiments on the Colorado River ecosystem downstream from Glen Canyon Dam, Arizona: U.S. Geological Survey Circular 1366, 147 p. https://pubs.usgs.gov/circ/1366/

Melis, T.S.,  Grams, P.E., Kennedy, T.A., Ralston, B.E., Robinson, C.T., Schmidt, J.C., Schmit, L.M., Valdez, R.A., and Wright, S.A., 2011, Three experimental  high-flow releases from Glen Canyon Dam, Arizona—Effects on the downstream Colorado River ecosystem: U.S. Geological Survey Fact Sheet 2011-3012, 4 p. https://pubs.usgs.gov/fs/2011/3012/

Grams, P.E., Hazel, J.E., Schmidt, J.C., Kaplinski, M., Wright, S.A., Topping, D.J., and Melis, T.S., 2010, Geomorphic response of sandbars to the March 2008 high-flow experiment on the Colorado River downstream from Glen Canyon Dam, in Hydrology and sedimentation for a changing future; existing and emerging issues (Joint Federal Interagency Conference 2010--Federal Interagency Hydrologic Modeling, 4th, and Federal Interagency Sedimentation, 9th), Las Vegas, Nev., June 27- July 1, Proceedings: v. ISBN: 978-0-9779007-3-2, CD-ROM.

Grams, P.E., Schmidt, J.C., and Andersen, M.E., 2010, 2008 High-flow experiment at Glen Canyon Dam--morphologic response of eddy-deposited sandbars and associated aquatic backwater habitats along the Colorado River in Grand Canyon National Park: U.S. Geological Survey Open-File Report 2010-1032, 73 p. https://pubs.usgs.gov/of/2010/1032/.

Grams, P.E., Schmidt, J.C., and Topping D.J., 2010, Bed incision and channel adjustment of the Colorado River in Glen Canyon National Recreation Area downstream from Glen Canyon Dam , in Melis, T.S., Hamill, J.F., Bennett, G.E., Coggins, L.G., Jr., Grams, P.E., Kennedy, T.A., Kubly, D.M., and Ralston, B.E., eds., Proceedings of the Colorado River Basin Science and Resource Management Symposium, November 18–20, 2008, Scottsdale, Arizona: U.S. Geological Survey Scientific Investigations Report 2010–5135. https://pubs.usgs.gov/sir/2010/5135/

Hazel, J.E.., Jr., Grams, P.E., Schmidt, J.C., and Kaplinski, M., 2010, Sandbar response following the 2008 high-flow experiment on the Colorado River in Marble and Grand Canyons, Arizona: U.S. Geological Survey Scientific Investigations Report 2010-5015, 52 p. http://pubs.usgs.gov/sir/2010/5015/.

Melis, T.S., Hamill, J.F., Coggins, L.G., Bennett, G.E., Grams, P.E., Kennedy, T.A., Kubly, D.M., and Ralston, B.E., 2010, Proceedings of the Colorado River Basin Science and Management Symposium, November 18-20, 2008, Scottsdale, Arizona: U.S. Geological Survey Scientific Investigations Report 2010-5135, 372 p. https://pubs.usgs.gov/sir/2010/5135/

Melis, T.S., Topping, D.J., Grams, P.E., Rubin, D.M., Wright, S.A., Draut, A.E., Hazel, J.E., Jr., Ralston, B.E., Kennedy, T.A., Rosi-Marshall, Emma, Korman, Josh, Hilwig, K.D., and Schmit, Lara M., 2010, 2008 High-flow experiment at Glen Canyon Dam benefits Colorado River resources in Grand Canyon National Park: U.S. Geological Survey Fact Sheet 2010-3009, 4 p. http://pubs.usgs.gov/fs/2010/3009/.

Rubin, D.M., Topping, D.J., Chezar, H., Hazel, J.E., Schmidt, J.C., Breedlove, M., Melis, T.S., and Grams, P.E., 2010, 20,000 grain-size observations from the bed of the Colorado River and implications for sediment transport through Grand Canyon, in Hydrology and sedimentation for a changing future; existing and emerging issues (Joint Federal Interagency Conference 2010—Federal Interagency Hydrologic Modeling, 4th, and Federal Interagency Sedimentation, 9th), Las Vegas, Nev., June 27- July 1, Proceedings: v. ISBN: 978-0-9779007-3-2, CD-ROM.

Topping, D.J., Rubin, D.M., Grams, P.E., Griffiths, R.E., Sabol, T.A., Voichick, N., Tusso, R.B., Vanaman, K.M., and McDonald, R.R., 2010, Sediment transport during three controlled-flood experiments on the Colorado River downstream from Glen Canyon Dam, with implications for eddy-sandbar deposition in Grand Canyon National Park: U.S. Geological Survey Open-File Report 2010-1128, 111 p. https://pubs.usgs.gov/of/2010/1128/

Wright, S.A. and Grams, P.E., 2010, Evaluation of water year 2011 Glen Canyon Dam flow release scenarios on downstream sand storage along the Colorado River in Arizona: U.S. Geological Survey Open-File Report 2010-1133, 18 p. https://pubs.usgs.gov/of/2010/1133/

Grams, P.E., and Wilcock, P.R., 2007, Water Resources Research.  Entrainment of fine sediment into suspension over a coarse immobile bed in equilibrium transport.

Wiele, S.M., Wilcock, P.R, and Grams, P.E., 2007, Reach-averaged sediment routing model of a canyon river, Water Resources Research, v. 43, W02425, doi:10.1029/2005WR004824.

Grams, P.E., Schmidt, J.C., and Topping, D.J., 2007, The Degraded Reach:  Rate and Pattern of Bed and Bank Adjustment of the Colorado River in the 25 km Immediately Downstream from Glen Canyon Dam, GSA Bulletin, v. 119, no.5/6, p. 556-575; doi: 10.1130/B25969.1.

Grams, P.E., Wilcock, P.R, and Wiele, S.M., 2005, Entrainment and non-uniform transport of fine-sediment in coarse-bedded rivers.  proceedings, River Coastal and Estuarine Morphodynamics, Urbana, Illinois.

Grams, P.E. and Schmidt, J.C., 2005.  Equilibrium or indeterminate? Where sediment budgets fail: Sediment mass balance and adjustment of channel form, Green River downstream from Flaming Gorge Dam, Utah and Colorado.  Geomorphology, 71: 156-181. https://doi.org/10.1016/j.geomorph.2004.10.012

Grams, P.E. and Schmidt, J.C., 2002.  Streamflow regulation and multi-level flood plain formation: Channel narrowing on the aggrading Green River in the eastern Uinta Mountains, Colorado and Utah. Geomorphology, 44: 337-360. https://doi.org/10.1016/S0169-555X(01)00182-9

Grams, P.E. and Schmidt, J.C., 1999. Geomorphology of the Green River in the eastern Uinta Mountains, Dinosaur National Monument, Colorado and Utah. In: A.J. Miller and A. Gupta (Editors), Varieties of Fluvial Form. John Wiley & Sons Ltd, Chichester, pp. 81-111. https://www.wiley.com/en-us/Varieties+of+Fluvial+Form-p-9780471973515

Schmidt, J.C., Parnell, R.A., Grams, P.E., J.E. Hazel, M.A. Kaplinski, L.E. Stevens, and T.L. Hoffnagle, 2001, The 1996 controlled flood in Grand Canyon: hydrology, hydraulics, sediment transport, and geomorphic change: Ecological Applications, 11(3): 657-671. DOI: 10.2307/3061108

Schmidt, J.C., Grams, P.E. and Leschin, M.F., 1999. Variation in the magnitude and style of deposition and erosion in three long (8-12 km) reaches as determined by photographic analysis. In: R.H. Webb, J.C. Schmidt, R.A. Valdez and G.R. Marzolf (Editors), The Controlled Flood in Grand Canyon. Geophysical Monograph 110. American Geophysical Union, pp. 185-203. DOI:10.1029/GM110

Schmidt, J.C., Grams, P.E. and Webb, R.H., 1995. Comparison of the magnitude of erosion along two large regulated rivers. Water Resources Bulletin, 31: 617-631. https://doi.org/10.1111/j.1752-1688.1995.tb03389.x

Theses:

Grams, P.E., 2006, Sand transport over a coarse and immobile bed.  Ph.D. dissertation, Johns Hopkins University, Baltimore, Maryland.

Grams, P.E., 1997. Geomorphology of the Green River in Dinosaur National Monument. MS Thesis, Utah State University, Logan, Utah, 140 pp. https://digitalcommons.usu.edu/etd/6703/

Grams, P.E., 1991. Degradation of alluvial sand bars along the Snake River below Hells Canyon Dam, Hells Canyon National Recreation Area, Idaho, Middlebury College, Middlebury, Vermont, 98 pp. https://www.fs.usda.gov/Internet/FSE_DOCUMENTS/fsbdev7_008716.pdf