Christopher Magirl

Research Interests

Hydraulics, Hydrology Water Resources Engineering, River Mechanics, Sediment Transport, Surface-Water Modeling, Fluvial Geomorphology, Debris Flows, Mountain Processes

Areas of Expertise

Flow Instrumentation, Computational Fluid Dynamics, Hydraulic Modeling (HEC applications, GSTARS, MD-SWMS), Computer Programming (C/C++, Fortran, Perl), Field Survey, Geographic Information Systems (GIS), Product Development Management, Manufacturing Engineering

Education

Ph.D. (2006)	Hydrology (minor in Geology), The University of Arizona, Tucson, Arizona Advisors: Dr. Victor R. Baker and Dr. Robert H. Webb “Bedrock-controlled fluvial geomorphology and the hydraulics of rapids on the Colorado River”
(2009)	USGS Training: Sediment Data-Collection Techniques, Castle Rock, Washington
(2002)	USGS Training: MD-SWMS Hydraulic Modeling, Denver, Colorado
(2001)	NASA Summer School: High Performance Computational Sciences, Greenbelt, Maryland
M.S. (1992)	Mechanical Engineering, Purdue University, West Lafayette, Indiana Advisor: Dr. Frank P. Incropera "Experimental and numerical investigation of solidification of aqueous ammonium chloride”
B.S. (1990)	Aerospace Engineering, The University of Arizona, Tucson, Arizona

Professional Overview

Hydrologist

U.S. Geological Survey, Tacoma, Washington. July 2008 – present

• Developing geomorphic and GIS methodology to determine navigability of rivers.
• Designing and building low-cost, low-energy solar desalinization loop in Chula Vista, California.
• Researching geomorphic response of fluvial channels to dam removal.

Hydrologist

U.S. Geological Survey, Tucson, Arizona. May 2000 – June 2008

• Researched the complex formation, evolution, and hydraulics of rapids on bedrock-controlled rivers.
• Analyzed debris flows and debris-flow processes in arid and mountainous regions.
• Developed numerical models to analyze fluid mechanics and geomorphology of fluvial systems.
• Applied instrumentation (pitot tube, ADV, ADCP, fathometer) to study sediment transport and geomorphology.

Hydrologist

Self Employed, Tucson, Arizona. July 2004 – January 2007

• Provided hydraulic modeling expertise for restoration ecology work on riparian ecosystems.
• Built several HEC-RAS models for riparian streams and rivers in the Southwest.

Civil Engineer, EIT

Tetra Tech, Inc., Tucson, Arizona. May 2000 – November 2000

• Used HEC-1, HEC-2, and HEC-RAS to simulate 100-year discharge within Maricopa County.
• Completed a similar design and analysis of the flood-prone Earp Wash in Pima County, Arizona.

Project Manager

Hewlett-Packard Company, San Diego, California. August 1997 – August 1999

• Led a cross-functional business team in the development of new business opportunities.
• Recruited and managed a highly skilled and responsive team of 8 engineers and 3 technicians exploring printing opportunities outside traditional Hewlett-Packard markets.
• Managed development team to design Hewlett-Packard’s first Internet Appliance Printer, the e-Printer, a revolutionary, low-cost, low-profile printer that yielded more than 30 patents for HP.

Hardware Design Engineer

Hewlett-Packard Company, San Diego, California. April 1996 – August 1997

• Investigated the application of thermal inkjet printing in medical imaging and pre-press proofing.
• Worked closely with customers and partner divisions creatively applying HP technology to new target markets.

Development/Manufacturing Engineer

Hewlett-Packard Company, San Diego, California. August 1992 – April 1996

• Contributed to the research team delivering the world’s first 600-dpi, drop-on-demand inkjet cartridge.
• Saved millions of dollars in production costs with landmark print quality study characterizing defects.

Research Assistant

Purdue University, West Lafayette, Indiana. August 1990 – July 1992

• Characterized and improved casting processes of binary alloys used in high-performance applications.
• Applied multiphase CFD model and data-collection techniques to characterize the solidification..

Registration

1990 Passed the Engineer-in-Training Exam, Arizona, #900140

Teaching and Mentoring Experience

2008	Guest Lecturer in GEOS 596c, Fluvial Geomorphology, Universityof Arizona
2003	Assisted in the instruction of GEOS 650, Field Studies in Geomorphology, University of Arizona
1994–1995	Manufacturing Processes Instructor, Thermal Inkjet University, Industrial Course, Hewlett-Packard
2001–2007	Mentored four M.S. students and two B.S. students working on geomorphology projects at the USGS
1993–1999	Mentored a number of engineers (including my development team) at Hewlett-Packard

Publications

Griffiths, P.G., C.S. Magirl, R.H. Webb, E. Pytlak, P.A. Troch, and S.W. Lyon, 2009, “Spatial precipitation frequency of an extreme event: the July 2006 mesoscale convective complexes and floods in southeastern Arizona,” Water Resources Research, Vol. 45, W07419, doi:10.1029/2008WR007380.

Magirl, C.S., and T.D. Olsen, 2009, “Navigability potential of Washington rivers and streams determined with hydraulic geometry and a geographic information system,” U.S. Geological Survey Scientific Investigations Report 2009–5122, 22 p.

Magirl, C.S., J.W. Gartner, G.M. Smart, and R.H. Webb, 2009, “Water velocity and the nature of critical flow in large rapids on the Colorado River, Utah,” Water Resources Research, Vol. 45, W05427, doi:10.1029/2009WR007731.

Webb, R.H., Magirl, C.S., Griffiths, P.G., Youberg, A., and Pearthree, P.A., 2008, “Slopes fail, debris flows in extremis,” Southwest Hydrology, Vol. 7, p. 8.

Webb, R.H., C.S. Magirl, P.G. Griffiths, and D.E. Boyer, 2008, “Debris flows and floods in southeastern Arizona from extreme precipitation in July 2006; magnitude, frequency, and sediment delivery,” U.S. Geological Survey Open-File Report 2008-1274, 95 p.

Magirl, C.S., M.J. Breedlove, R.H. Webb, and P.G. Griffiths, 2008, “Modeling Water-Surface Elevations and Virtual Shorelines for the Colorado River in Grand Canyon, Arizona,” U.S. Geological Survey Scientific Investigation Report 2008-5075, 32 p.

Blainey, J.B., R.H. Webb, and C.S. Magirl, 2007, “Modeling the spatial and temporal variation of monthly and seasonal precipitation on the Nevada Test Site,” 1960–2006: U.S. Geological Survey Open-File Report 2007-1269, 40 p.

Magirl, C.S., G.M. Smart, J.W. Gartner, and R.H. Webb, 2007, “Techniques and instrumentation for measuring flow in high-gradient rivers,” in Cowin, E.A. and D.F. Hill (editors), 2007 Hydraulic Measurements & Experimental Methods Conference: Lake Placid, New York, September 10-12, American Society of Civil Engineers, pp. 454–459.

Magirl, C.S., R.H. Webb, M. Schaffner, S.W. Lyon, P.G. Griffiths, C. Shoemaker, C.L. Unkrich, S. Yatheendradas, P.A. Troch, E. Pytlak, D.C. Goodrich, S.L.E. Desilets, A. Youberg, and P.A. Pearthree, 2007, “Impact of recent extreme Arizona storms,” Eos Transactions, American Geophysical Union, Vol. 88, No. 17, pp. 191, 193.

Magirl, C.S., C. Shoemaker, R.H. Webb, M. Schaffner, P.G. Griffiths, E. Pytlak, 2007, “Debris flows and record floods from extreme mesoscale convective thunderstorms over the Santa Catalina Mountains, Arizona,” U.S. Geological Survey Open-File Report 2007-1108, 1 sheet.

Magirl, C.S., P.G. Griffiths, and R.H. Webb, 2006, “ADV point measurements within rapids of the Colorado River in Grand Canyon,” in Graham, R. (editor), Examining the Confluence of Environmental and Water Concerns, Proceedings of the 2006 World Environmental and Water Resources Congress, Omaha, Nebraska, May 21–25, 2006: Reston, Virginia, American Society of Civil Engineers Publication, 10 p.

Yanites, B.J., R.H. Webb, P.G. Griffiths, and C.S. Magirl, 2006, “Debris flow deposition and reworking by the Colorado River in Grand Canyon, Arizona.” Water Resources Research, Vol. 42, No. 11, W11411, doi:10.1029/2005WR004847.

Webb, R.H., P.G. Griffiths, C.S. Magirl, and T.C. Hanks, 2005, “Debris flows in Grand Canyon and the rapids of the Colorado River,” in Gloss, S.P., Lovich, J.E., and Melis, T.S. (eds.), The State of the Colorado River Ecosystem in Grand Canyon: U.S. Geological Survey Circular 1282, pp. 139–152.

Magirl, C.S., R.H. Webb, and P.G. Griffiths, 2005, “Changes in the water surface profile of the Colorado River in Grand Canyon, Arizona, between 1923 and 2000,” Water Resources Research, Vol. 41, No. 5, W05021, doi:10.1029/2003WR002519.

Magirl, C.S. and F.P. Incropera, 1995 “Effect of mold oscillation on convection and macrosegregation for unidirectional solidification from below,” Proceedings of Fourth ASME/JSME Thermal Engineering Conference, Maui, Hawaii, March 19-24, Vol. 4, pp. 33–39.

Magirl, C.S. and F.P. Incropera, 1994, “Multidirectional solidification of an aqueous ammonium chloride solution,” Proceedings Tenth International Heat Transfer Conference, G.F. Hewitt, Ed., Taylor and Francis Publishers, Brighton, England, Vol. 4, pp. 79–84.

Magirl, C.S. and F.P. Incropera, 1993, “Flow and morphological conditions associated with unidirectional solidification of aqueous ammonium chloride,” ASME Transactions, J. Heat Transfer, Vol. 115, pp. 1036–1043.

Magirl, C.S. and F.P. Incropera, 1992, “Flow and morphological conditions associated with unidirectional solidification of aqueous ammonium chloride,” In Topics in Heat Transfer, ASME HTD-Vol. 206-1, pp. 1–10, M. Keyhani, P.G. Simpkins, R.H. Pletcher, R.S. Amano, and B.F. Armaly, Eds., Twenty-Ninth National Heat Transfer Conference, San Diego, August 6–9.

Invited Talks

Curran, C.A., A.E. Draut, and C.S. Magirl, 2009, “Sediment Transport and Fluvial Geomorphology on the Elwha River,” Northwest Scientific Association 81st Annual Meeting, March 25-28, 2009, Seattle, Washington.

Magirl, C.S., R.H. Webb, P.G. Griffiths, 2007, “Debris Flows from Extreme Convective Precipitation in a Semi-Arid Mountainous Region,” Geological Society of America Abstracts with Programs, v. 39(6), p. 180, Denver, CO.

Magirl, C.S., R.H. Webb, P.G. Griffiths, D.E. Boyer, E. Pytlak, C. Shoemaker, M. Schaffner, T. Evans, P. Pearthree, and A. Youberg, 2007, “Floods and Debris Flows in the Catalina Front Range and Southern Arizona, July 31, 2006,” The Menudo Society, Tucson, Arizona, August 14.

Magirl, C.S., 2007, “Rapids on the Colorado River,” Meeting of the Southern Arizona Paddlers Club, Tucson, Arizona, May 14.

Magirl, C.S., 2007, “Summary of Coarse-Grained Sediment Modeling Efforts in Grand Canyon,” GCMRC’s Sediment Transport Modeling Review and Workshop, Santa Cruz, California, February 16.

Magirl, C.S., R.H. Webb, P.G. Griffiths, D.E. Boyer, E. Pytlak, C. Shoemaker, M. Schaffner, T. Evans, P. Pearthree, and A. Youberg, 2007, “Floods and Debris Flows in the Catalina Front Range and Southern Arizona, July 31, 2006,” Brown Bag Seminar at the US Geological Survey, Flagstaff, Arizona, March 8.

Magirl, C.S., J.W. Gartner, P.G. Griffiths, and R.H. Webb, 2007, “Coarse-Grained Sediment in Grand Canyon,” Morning Colloquium at the US Geological Survey, Flagstaff, Arizona, March 8.

Magirl, C.S., R.H. Webb, P.G. Griffiths, D.E. Boyer, E. Pytlak, C. Shoemaker, M. Schaffner, T. Evans, P. Pearthree, and A. Youberg, 2007, “Floods and Debris Flows in the Catalina Front Range and Southern Arizona, July 31, 2006,” Southern Arizona Branch of the American Society of Civil Engineers, Tucson, Arizona, February 14.

Magirl, C.S., R.H. Webb, P.G. Griffiths, D.E. Boyer, E. Pytlak, C. Shoemaker, M. Schaffner, T. Evans, P. Pearthree, and A. Youberg, 2007, “Southern Arizona Floods and Debris Flows during the Summer of 2006,” Cascades Volcano Observatory Lunch Colloquium, Portland, Oregon, February 8.

Magirl, C.S., R.H. Webb, P.G. Griffiths, D.E. Boyer, E. Pytlak, C. Shoemaker, M. Schaffner, T. Evans, P. Pearthree, and A. Youberg, 2006, “Floods and Debris Flows in the Catalina Front Range,” Arizona Chapter of the American Public Works Association, Tucson, Arizona, November 16.

Other Delivered Presentatinos

Magirl, C.S., 2009, “Hydraulic and geomorphic response of the bedrock-controlled Colorado River to extreme floods,” U.S. Geological Survey Brown-Bag Seminar, Tacoma, Washington, February 5.

Magirl, C.S., 2009, “Hydraulic and geomorphic response of the bedrock-controlled Colorado River to extreme floods,” U.S. Geological Survey Brown-Bag Seminar, Portland, Oregon, January 27.

Magirl, C.S., and M.E. Andersen, 2008, “Velocity distribution in the pools and rapids of the Colorado River and the impact on aquatic ecology,” Colorado River Basin Science and Resource Management Symposium, November 18-20, 2008, Scottsdale, Arizona.

Magirl, C.S., M.J. Breedlove, R.H. Webb, and P.G. Griffiths, 2008, “One-dimensional computer model and GIS tool set to predict river stage and inundation on the Colorado River in Grand Canyon,” Colorado River Basin Science and Resource Management Symposium, November 18-20, 2008, Scottsdale, Arizona.

Magirl, C.S., 2008, “Rapids and big rocks: Fluvial geomorphology on the bedrock-controlled Colorado River,” Colorado School of Mines Department of Geology and Geologic Engineering Lecture, Golden, CO, May 1.

Magirl, C.S., J.W. Gartner, P.G. Griffiths, and R.H. Webb, 2008, “Bedrock-controlled rivers: The role of coarse-grained alluvium in governing fluvial geomorphology,” U.S. Geological Survey Seminar, Tacoma, WA, April 10.

Magirl, C.S., R.H. Webb, P.G. Griffiths, D.E. Boyer, E. Pytlak, C. Shoemaker, M. Schaffner, T. Evans, P. Pearthree, and A. Youberg, 2007, “Floods and Debris Flows in the Catalina Front Range and Southern Arizona, July 31, 2006,” The University of Arizona’s Department of Hydrology and Water Resources Seminar, Tucson, Arizona, March 21.

Magirl, C.S., C. Shoemaker, R.H. Webb, M. Schaffner, P.G. Griffiths, E. Pytlak, 2006, “Debris flows and record floods from extreme mesoscale convective thunderstorms over the Santa Catalina Mountains, Arizona,” AGU Fall Meeting, Abstract H21B-1370.

Magirl, C.S., E. Pytlak, R.H. Webb P.G. Griffiths, D.E. Boyer, C. Shoemaker, M. Schaffner, T. Evans, P. Pearthree, and A. Youberg, 2006, “Floods and Debris Flows in the Catalina Front Range,” Arizona Geological Society, Inc., Tucson, Arizona, November 14.

Magirl, C.S., Webb, R.H., P.G. Griffiths, D.E. Boyer, E. Pytlak, C. Shoemaker, M. Schaffner, 2006, “Debris flows and Record Floods from Extreme Mesoscale Convective Thunderstorms over the Santa Catalina Mountains, Arizona,” Southeast Arizona Chapter of the American Meteorological Society, Tucson, Arizona October 26.

Magirl, C.S., P.G. Griffiths, Webb, R.H., D.E. Boyer, E. Pytlak, C. Shoemaker, M. Schaffner, 2006, “Floods and Debris flows in the Catalina Front Range,” Pima County Board of Supervisors Public Meeting, Tucson, Arizona, October 3.

Magirl, C.S., J.W. Gartner, P.G. Griffiths, R.H. Webb, T. Kenney, 2006, “Rapids in bedrock rivers: Hydraulic Monitoring and Modeling,” USGS Water Resources Research Seminar, Menlo Park, California, September 27.

Magirl, C.S., Webb, R.H., P.G. Griffiths, D.E. Boyer, E. Pytlak, C. Shoemaker, M. Schaffner, 2006, “Floods and Debris flows in the Catalina Front Range,” Quarterly meeting of the Society of American Foresters, Tucson, Arizona, September 21.

Magirl, C.S., J.W. Gartner, P.G. Griffiths, and R.H. Webb, 2006, “Rapids in bedrock rivers: Hydraulic Monitoring and Modeling,” Grand Canyon Monitoring and Research Center presents: Protocols Evaluation Program, Implementation of Long-Term Monitoring in the 21st Century, Flagstaff, Arizona, August 15-17.

Magirl, C.S., J.W. Gartner, P.G. Griffiths, R.H. Webb, and T. Kenney, 2006, “Rapids in bedrock rivers: Measurements and modeling of velocity distributions,” USGS Seminar, USGS Headquarters, Reston, Virginia.

Magirl, C.S., J.W. Gartner, Griffiths, P.G., and R.H. Webb, 2006, “Velocity measurements in rapids on the Colorado River in Grand and Cataract Canyons, Arizona and Utah” ASCE World Water and Environmental Resources Congress 2006, Omaha, Nebraska.

Magirl, C.S., 2006, “Velocity measurements in rapids on the Colorado River in Grand Canyon,” The Department of Hydrology and Water Resources’ El Dia del Agua 2006, the University of Arizona.

Magirl, C.S. and R.H. Webb, 2005, “Hydraulic response of Colorado River rapids to a reworking flood,” AGU Fall Meeting H53B-0476.

Magirl, C.S., and M.J. Breedlove, 2005, “And improved STARS model: Predicted Colorado River water-surface elevations and virtual shorelines for flows up to 200,000 cfs,” The Glen Canyon Dam Adaptive Management Program Presents: Colorado River Ecosystem Science Symposium, Tempe, Arizona, October 25-37.

Hanks, T.C., R.H. Webb, C.S. Magirl, and P.G. Griffiths, 2003, “Longitudinal-profile convexities related to long-term debris-flow inputs to the Colorado River in Grand Canyon, Arizona,” Geological Society of America Abstracts with Programs, v. 35, no. 6, p. 24.

Magirl, C.S., R.H. Webb, and P.G. Griffiths, 2003, “Geomorphic Change Detection in Grand Canyon: Comparison of 2000 LIDAR and 1923 Survey Data,” The Colorado River, An Ecosystem Science Symposium, The Glen Canyon Dam Adaptive Management Program, GCMRC, Tucson, Arizona, October 28-30.

Magirl, C.S., 2003, “1D Hydraulic Modeling: Advancements in hydraulic models used in Grand Canyon, Arizona,” The Department of Hydrology and Water Resources’ El Dia del Agua 2003, the University of Arizona.

Magirl, C.S., R.H. Webb, and P.G. Griffiths, 2002, “Geomorphic change detection in Grand Canyon: comparison of 2000 Lidar and 1923 survey data,” Geological Society of America Abstracts with Programs, v. 34, no. 6, p. 203.

Co-Authored Presentations

Griffiths, P.G., R.H. Webb, C.S. Magirl, and E. Pytlak, 2008, “Spatial precipitation frequency of an extreme event: the July 2006 mesoscale convective complexes and debris flows in southeastern Arizona,” Eos Transactions, American Geophysical Union, 89 (53), Fall Meeting Supplement, Abstract H44B-06.

Webb, R.H., P.G. Griffiths, and C.S. Magirl, 2008, “Debris flows in southeastern Arizona: Holocene frequency of extreme events,” Geological Society of America Abstracts with Programs, Vol. 40, No. 1, p. 88, Cordilleran Section and Rocky Mountain Section Joint Meeting, 19-21 March 2008, Las Vegas, Nevada.

Griffiths, P.,G., C.S. Magirl, R.H. Webb, D.E. Boyer, E. Pytlak, C. Shoemaker, M. Schaffner, T. Evans, P. Pearthree, and A. Youberg, 2007, “Floods and Debris Flows in the Catalina Front Range and Southern Arizona, July 31, 2006,” Casas Adobes Rotary Club, Tucson, Arizona, October 24.

Griffiths, P.G., C.S. Magirl, C.S., R.H. Webb, D.E. Boyer, E. Pytlak, C. Shoemaker, M. Schaffner, T. Evans, P. Pearthree, and A. Youberg, 2007, “Floods and Debris Flows in the Catalina Front Range and Southern Arizona, July 31, 2006,” Southern Arizona Environmental Management Society, Tucson, Arizona, September 26.

Smart, G.M., Magirl, C.S., J.W. Gartner, and R.H. Webb, 2007, “Techniques and instrumentation for measuring flow in high-gradient rivers,” 2007 Hydraulic Measurements & Experimental Methods Conference, Lake Placid, New York, September 10-12.

Parker, J.T.C., R.H. Webb, M. Schaffner, P.G. Griffiths, C. Shoemaker, C.S. Magirl, and E. Pytlak, 2007. Debris Flows and Record Floods from Extreme Mesoscale Convective Thunderstorms over the Santa Catalina Mountains, Arizona. Proceedings National Hydrologic Warning Council Seventh Biennial Conference and Exposition, Savannah, June 11-14, 2007.

Magirl, C.S., J.W. Gartner, and R.H. Webb, 2007 “Swift-water velocity measurements,” National Surface Water Conference & Hydroacoustics Workshop, St. Louis, Missouri, April 5.

Gartner, J.W., Magirl, C.S., R.H. Webb, P.G. Griffiths, D.E. Boyer, E. Pytlak, C. Shoemaker, M. Schaffner, T. Evans, P. Pearthree, and A. Youberg, 2007, “Floods and Debris Flows in the Catalina Front Range and Southern Arizona, July 31, 2006” National Surface Water Conference & Hydroacoustics Workshop, St. Louis, Missouri, April 3.

Griffiths, P.G., R.H. Webb, C.S. Magirl, D.E. Boyer, E. Pytlak, C. Shoemaker, M. Schaffner, T. Evans, P. Pearthree, and A. Youberg, 2007, “Floods and Debris Flows in the Catalina Front Range and Southern Arizona, July 31,” Arizona Water and Pollution Control Association Luncheon, Tucson, Arizona, March 22.

Webb, R.H., P.G. Griffiths, C.S. Magirl, D.E. Boyer, E. Pytlak, C. Shoemaker, M. Schaffner, T. Evans, P. Pearthree, and A. Youberg, 2007, “Floods and Debris Flows in the Catalina Front Range and Southern Arizona, July 31,” The University of Arizona’s Department of Soil, Water, and Environmental Science; Tucson, Arizona, Jan. 29.

Youberg, A., Webb, R.H., P.G. Griffiths, C.S. Magirl, D.E. Boyer, E. Pytlak, C. Shoemaker, M. Schaffner, T. Evans, and P. Pearthree, 2007, “Floods and Debris Flows in the Catalina Front Range, July 31, 2006” Arizona Hydrological Society Monthly Meeting, Tucson, Arizona, January 9.

Webb, R.H., P.G. Griffiths, C.S. Magirl, D.E. Boyer, E. Pytlak, C. Shoemaker, M. Schaffner, T. Evans, P. Pearthree, and A. Youberg, 2006, “Floods and Debris Flows in the Catalina Front Range,” Rural Metro Fire Informational Meeting, Oro Valley, Arizona, November 20.

Shoemaker, C., C.S. Magirl, M. Schaffner, R.H. Webb, E. Pytlak, and P.G. Griffiths, 2006, “Extreme Hydrometeorological Event From Multi-Day Mesoscale Convective Thunderstorms over the Santa Catalina Mountains, Arizona,” The Thirteenth Annual Workshop on Weather Prediction in the Intermountain West, Salt Lake City, Utah, November 16.

Webb, R.H., P.G. Griffiths, C.S. Magirl, D.E. Boyer, E. Pytlak, C. Shoemaker, M. Schaffner, T. Evans, P. Pearthree, and A. Youberg, 2006, “Floods and Debris Flows in the Catalina Front Range,” Oro Valley Town Council, Oro Valley, Arizona, November 16.

Griffiths P.G., R.H. Webb, C.S. Magirl, D.E. Boyer, E. Pytlak, C. Shoemaker, M. Schaffner, T. Evans, P. Pearthree, and A. Youberg, 2006, “Floods and Debris Flows in the Catalina Front Range,” Pima County Flood Control District Advisory Board Meeting, Tucson, Arizona, November 15.

Webb, R.H., P.G. Griffiths, C.S. Magirl, D.E. Boyer, E. Pytlak, C. Shoemaker, M. Schaffner, 2006, “Debris flows and Record Floods from Extreme Mesoscale Convective Thunderstorms over the Santa Catalina Mountains, Arizona,” Pima Domestic Preparedness Council: Pima County Office of Emergency Management and Homeland Security, Tucson, Arizona, October 19.

Griffiths, P.G., R.H. Webb, R.H., C.S. Magirl, D.E. Boyer, E. Pytlak, C. Shoemaker, M. Schaffner, 2006, “Floods and Debris flows in the Catalina Front Range,” Friends of Sabino Canyon Annual Meeting, Tucson, September 30.

Griffiths, P.G., Webb, R.H., C.S. Magirl, D.E. Boyer, E. Pytlak, C. Shoemaker, M. Schaffner, 2006, “Floods and Debris flows in the Catalina Front Range,” Coronado National Forest Sabino Canyon Public Forum, Tucson, Arizona, September 23.

Webb, R.H., P.G. Griffiths, C.S. Magirl, D.E. Boyer, E. Pytlak, C. Shoemaker, M. Schaffner, 2006, “Floods and Debris flows in the Catalina Front Range,” USDA Forest Service, Coronado District, Tucson, Arizona, Sept. 21.

Webb, R.H., P.G. Griffiths, C.S. Magirl, D.E. Boyer, E. Pytlak, C. Shoemaker, M. Schaffner, 2006, “Debris flows and Record Floods from Extreme Mesoscale Convective Thunderstorms over the Santa Catalina Mountains, Arizona,” US Geological Survey Seminar, Tucson, Arizona, September 20.

Webb, R.H., P.G. Griffiths, C.S. Magirl, D.E. Boyer, E. Pytlak, C. Shoemaker, M. Schaffner, 2006, “Floods and Debris flows in the Catalina Front Range,” Department of Pima County Flood Control, Tucson, Arizona, Sept. 18.

Webb, R.H., P.G. Griffiths, C.S. Magirl, D.E. Boyer, E. Pytlak, C. Shoemaker, M. Schaffner, 2006, “Debris flows in the Catalina Front Range,” USGS Brownbag Seminar, Tucson, Arizona, September 6.

Griffiths, P.G., Webb, R.H., and Magirl, C.S., 2006, “Modeling debris flows: Grand Canyon and the Colorado Plateau,” Grand Canyon Monitoring and Research Center Protocol Evaluation Program, Implementation of Long-Term Monitoring in the 21st Century, Flagstaff, Arizona, August 15-17.

Yanites, B.J., R.H. Webb, P.G. Griffiths, and C.S. Magirl, 2005, “Remote sensing of debris flow deposition and reworking by the Colorado River in Grand Canyon, Arizona,” AGU Fall Meeting H43C-0511.

Webb, R.H., P.G. Griffiths, C.S. Magirl, and B.J. Yanites, 2005, “Changes in debris fans and rapids: 21 years of monitoring debris flows in Grand Canyon” The Glen Canyon Dam Adaptive Management Program Presents: Colorado River Ecosystem Science Symposium, Tempe, Arizona, October 25-37.

Webb, R.H., P.G. Griffiths, C.S. Magirl, and T.C. Hanks, 2005, “Debris Flows in Grand Canyon and the Rapids of the Colorado River (Chapter 8),” The Glen Canyon Dam Adaptive Management Program Presents: Colorado River Ecosystem Science Symposium, Tempe, Arizona, October 25-37.

Webb, R.H., P.G. Griffiths, C.S. Magirl, and T.C. Hanks, 2005 “Debris flows in Grand Canyon: Modeling changes in the longitudinal profile of the Colorado River,” Grand Canyon Monitoring and Research Center’s Geomorphology Symposium, Flagstaff, Arizona, February 8-10.

Hanks, T.C., R.H. Webb, C.S. Magirl, and P.G. Griffiths, 2003, “Longitudinal Profile Convexities: Long-term debris flow input, and transport processes for the Colorado River in Grand Canyon, Arizona” The Colorado River, An Ecosystem Science Symposium, The Glen Canyon Dam AMP, GCMRC, Tucson, October 28-30.

Scholarships and Awards

• 2001 NASA Summer School: High Performance Computational Sciences
• National Science Foundation Graduate Trainee Fellowship, 1999–2000

Patents

• 6,923,585: Mann, Hay, Catchpole, and Magirl, 2005, “Hybrid set-top box and printing device.”
• 6,652,174: Mann, Hay, Catchpole, and Magirl, 2003, “Hybrid set-top box and printing device.”
• 6,328,415: Norton, McKay, Yamamoto, Magirl, and Hay, 2001, “Displaceable print cartridge chute.”
• 6,139,128: Magirl, McKay, Yamamoto, and Norton, 2000, “Discrete pen wiping…to reduce size of inkjet printer.”
• 6,135,655: Magirl, 2000, “Multipixel dots in monochrome drop-on-demand printing.”

Membership

• American Geophysical Union
• Geological Society of America