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Analysis of water surface and flow distribution for the design flood at a proposed highway crossing of the Sabine River near Tatum, Texas

Water-Resources Investigations Report 88-4231

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Abstract

The hydraulic effects of the proposed Texas Highway 43 crossing of the Sabine River were determined using a two-dimensional finite-element surface-water flow model (FESWMS). In the planning of the crossing by the Texas State Highway Department, accurate approximations of apportionment of flow among the openings and velocities within the openings were of concern. The model was used to simulate flow in the river floodplain system for the proposed crossing design, an alternate crossing design, and for the natural conditions. The alternate design more closely represents the existing bridge widths. Preliminary one-dimensional computations were used as an aid in establishing the boundary conditions for the two-dimensional analysis. The simulations show that, among other things, a proposed lengthening of the right overflow bridge is not beneficial. The alternate design is one that does not include the proposed lengthening of the right overflow bridge or the proposed construction of a new embankment at the existing main channel opening. The results of the two-dimensional simulation of the proposed design indicate some differences in the apportionment of flow among the openings when compared to the one-dimensional proposed crossing computations. Simulations of the alternate crossing design resulted in water-surface altitudes which are slightly lower than the proposed design. The alternate design would require less modification to the existing embankment. Velocities computed at the bridge abutments using the two- dimensional model were within the design specifications of the Texas State Department of Highways and Public Transportation. (USGS)

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Analysis of water surface and flow distribution for the design flood at a proposed highway crossing of the Sabine River near Tatum, Texas
Series title:
Water-Resources Investigations Report
Series number:
88-4231
Edition:
-
Year Published:
1989
Language:
ENGLISH
Publisher:
Dept. of the Interior, U.S. Geological Survey ; Books and Open-File Reports Section [distributor],
Description:
v, 36 p. :ill. ;28 cm.