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| USGS North Carolina Water Science Center |
North Carolina Water Science Center
3916 Sunset Ridge Rd
Raleigh, NC 26707
(919) 571-4021 Voice
(919) 571-4041 FAX
cwagner@usgs.gov
Education · Research · Publications
Master of Science, Environmental Engineering (1999) University of Tennessee, Knoxville, Tennessee.
Bachelor of Science, Civil and Environmental Engineering (1998) University of Tennessee, Knoxville, Tennessee.
Hydrodynamic Modeling – Activities include one- and two-dimensional hydraulic and sediment transport numerical modeling to evaluate the impacts of structures such as bridges and dam on habitat and scour processes.
The U.S. Geological Survey, in cooperation with the North Carolina Department of Transportation, initiated a study to compare one- and two-dimensional model results with field measurements at complex riverine and tidal bridges in North Carolina to evaluate the ability of each model to represent field conditions. By compiling pertinent bridge site characteristics and relating them to the results of several model-comparison studies, the framework for developing guidelines for selecting the most appropriate model for a given bridge site can be accomplished.
The Olmsted two-dimensional hydrodynamic and sediment-transport model was developed in cooperation with the U.S. Army Corps of Engineers, Louisville District. The model was used to estimate the effects that the phased-construction sequence and operation of the Olmsted Locks and Dam had on sediment-transport patterns in the 11.9-mile study reach (Ohio River miles 962.6 to 974.5), particularly over an area of endangered orange-footed pearly mussel (Plethobasus cooperianus) beds beginning approximately 2 miles downstream of the dam construction.
Advancement of Hydroacoustic Technology – Activities include providing technical support to the Office of Surface Water for the development and advancement of hydroacoustic instrumentation for use in streamflow, velocity, depth, and other hydraulic and hydrologic measurements.
Water-Quality Modeling – Activities include developing hydrodynamic and water-quality models to assess the impact of fecal-indicator bacteria and other conservative and non-conservative water quality parameters on receiving waters and tributaries in the three-rivers area of Pittsburg, Pennsylvania. The water quality model (RMA4) will be used to (1) assist ALCOSAN in evaluating treatment alternatives; and (2) determine the relative significance of dry and wet-weather events on the receiving waters within the 3 Rivers.
Assessment of Mussel Habitat - Construction activities associated with bridge-replacement projects may jeopardize endangered mussel habitat by modifying river hydraulics and increasing scour and sedimentation. To evaluate the impact, freshwater-mussel and hydrographic surveys were conducted at two reference sites along the Allegheny River in northwestern Pennsylvania. Hydraulic data (water depth, velocity) and their derivatives (shear stress, shear velocity, Froude number) were collected or computed for a reference site and used as targets to identify mussel refuges for a bridge replacement site at Foxburg, PA.
StreamStats - The U.S. Geological Survey (USGS) has developed a Web-based application, named StreamStats, as a platform for obtaining streamflow statistics and other information for gaged and ungaged streams in the United States. NHDPlus is an integrated suite of application-ready geospatial data products that can be used to calculate watershed characteristics linked to a hydrologic flow-network for modeling watershed and stream-network processes. The USGS in cooperation with the North Carolina Department of Transportation (NCDOT) initiated a pilot project to develop and implement NHDPlus and StreamStats applications for the Upper French Broad River basin in western North Carolina. The pilot project utilizes the local resolution NHD product, 20-foot DEMs (derived from LIDAR data), and the most current regional streamflow regression equations, and datasets of landscape characteristics.
Bridge Scour – Activities include collecting real-time bridge scour data to ultimately improve accuracy of scour-prediction equations. The specific objectives of this research were as follows: (1) to describe and quantify the influence of processes affecting scour magnitude in contracted openings using field data; (2) to provide field data for use in verification of physical- and numerical-model studies; (3) to develop interim guidelines for applying scour-prediction methodology at contracted bridge sites for a wide range of common field situations; and (4) to provide recommendations for future research that will advance scourprediction methodology in accordance with the Strategic Plan for Scour Research as modified by the findings of this research (Parola et al, 1996).
Bales, J.D., Wagner, C.R., Tighe, K.C., Terziotti, Silvia, 2007, “Flood inundation maps for real-time flood mapping applications, Tar River Basin, North Carolina”, Scientific Investigations Report 2007-5032.
Fulton, J.F., Wagner, C.R., Rogers, M.E., Zimmerman, G.F., “Hydraulic Modeling of Endangered Mussel Habitat at Bridge Replacement Sites along the Allegheny River in Western Pennsylvania”, Journal of the North American Benthological Society, in review (2007).
Mueller, D.S. and Wagner, C.R., 2003, “Field Observations and Evaluations of Streambed Scour at Bridges”, Federal Highway Administration Publication FHWA-RD-03-052.
(PDF: 1.8MB, 131p)
Mueller, D.S. and Wagner, C.R., 2006, “Application of the Loop Method for Correcting Acoustic Doppler Current Profiler Discharge Measurements Biased by Sediment Transport”, Scientific Investigations Report 2006-5079.
Mueller, D.S. and Wagner, C.R., 2007, “Correcting Acoustic Doppler Current Profiler Discharge Measurements Biased by Sediment Transport”, American Society of Civil Engineers, Journal of Hydraulic Engineering, Vol. 133, No. 12, December 1.
Wagner, C.R. and Mueller, D.S., 2001, “Calibration and Validation of a Two-Dimensional Hydrodynamic Model of the Ohio River, Jefferson County, Kentucky”, Water Resources Investigations Report 01-4091.
Wagner, C.R., 2002, “Use of Velocity Data to Calibrate and Validate Two-Dimensional Hydrodynamic Models”, Proceedings paper and presentation to Federal Interagency Hydrologic Modeling Conference, Las Vegas, NV, July 28-August 1, 2002.
(PDF: 800KB, 12p)
Wagner, C.R., 2003, “Results of a Two-Dimensional Hydrodynamic and Sediment-Transport Model to Predict the Effects of the Phased Construction and Operation of the Olmsted Locks and Dam on the Ohio River near Olmsted, Illinois”, Water Resources Investigations Report 03-4336.
Wagner, C.R., Mueller, D.S., Parola, A.C., Hagerty, D.J., Benedict, S.T., 2005, “Scour at Contracted Bridge Openings”, Transportation Research Board, National Cooperative Highway Research Program, Project 24-14.
(PDF: 12.7MB, 299p)
Wagner, C.R., 2007, “Simulation of Water-Surface Elevations and Velocity Distributions at US Highway 13 Bridge over the Tar River near Greenville, North Carolina using Two-Dimensional and One-Dimensional Steady-State Hydraulic Models”, Scientific Investigations Report 2007-5263.
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