01152274

Component

https://doi.org/10.3141/2195-16

http://scholar.google.com...dict&publication_year=2010

The U.S. Geological Survey, in cooperation with the Maryland State Highway Administration, used field measurements of scour to evaluate the sensitivity of the Maryland abutment scour equation to the critical (or threshold) velocity variable. Four selected methods for estimating threshold velocity were applied to the Maryland abutment scour equation, and the predicted scour to the field measurements were compared. Results indicated that performance of the Maryland abutment scour equation was sensitive to the threshold velocity with some threshold velocity methods producing better estimates of predicted scour than did others. In addition, results indicated that regional stream characteristics can affect the performance of the Maryland abutment scour equation with moderate-gradient streams performing differently from low-gradient streams. On the basis of the findings of the investigation, guidance for selecting threshold velocity methods for application to the Maryland abutment scour equation are provided, and limitations are noted.

01331160

10-0119

English

pp 153-167

2010

Transportation Research Record: Journal of the Transportation Research Board

9780309160711

Print

Figures (13) ; References (14) ; Tables (2)

Bridge abutments; Critical velocity; Equations; Field studies; Hydraulic gradient; Mathematical prediction; Scour; Sensitivity analysis; Streams

Field measurements

Maryland

Bridges and other structures; Design; Highways; Hydraulics and Hydrology; I24: Design of Bridges and Retaining Walls

TRIS, TRB

Jan 25 2010 10:07AM

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