Simulation of water-surface elevations and velocity distributions at the U.S. Highway 13 bridge over the Tar River at Greenville, North Carolina, using one- and two-dimensional steady-state hydraulic models / by Chad R. Wagner ; prepared in cooperation with the North Carolina Department of Transportation.

Format:

Book

Government document

Author/Creator:

Wagner, C. Russell

Contributor:

North Carolina. Department of Transportation

Geological Survey (U.S.)

Series:

Scientific investigations report ; 2007-5263.

Scientific investigations report ; 2007-5263

Language:

English

Subjects (All):

Scour at bridges--North Carolina--Greenville--Mathematical models.

Scour at bridges.

Stream measurements--North Carolina--Greenville--Mathematical models.

Stream measurements.

Water levels--North Carolina--Greenville--Mathematical models.

Water levels.

Scour at bridges--Mathematical models.

Stream measurements--Mathematical models.

Water levels--Mathematical models.

North Carolina--Greenville.

Physical Description:

1 online resource (v, 33 pages)

Place of Publication:

Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2007.

Summary:

The use of one-dimensional hydraulic models currently is the standard method for estimating velocity fields through a bridge opening for scour computations and habitat assessment. Flood-flow contraction through bridge openings, however, is hydrodynamically two dimensional and often three dimensional. Although there is awareness of the utility of two-dimensional models to predict the complex hydraulic conditions at bridge structures, little guidance is available to indicate whether a one- or two-dimensional model will accurately estimate the hydraulic conditions at a bridge site. The U.S. Geological Survey, in cooperation with the North Carolina Department of Transportation, initiated a study in 2004 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. The field data consisted of discharge and depth-averaged velocity profiles measured with an acoustic Doppler current profiler and surveyed water- surface profiles for two high-flow conditions. For the initial study site (U.S. Highway 13 over the Tar River at Greenville, North Carolina), the water-surface elevations and velocity distributions simulated by the one- and two-dimensional models showed appreciable disparity in the highly sinuous reach upstream from the U.S. Highway 13 bridge.

Notes:

Title from title screen (viewed on February 8, 2008).

Includes bibliographical references (page 28).

OCLC:

191852629