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Transportation Research Record | 1996

Evaluation of Selected Pier-Scour Equations Using Field Data

Mark N. Landers; David S. Mueller

Field measurements of channel scour at bridges are needed to improve the understanding of scour processes and the ability to accurately predict scour depths. An extensive data base of pier-scour measurements has been developed over the last several years in cooperative studies between state highway departments, the Federal Highway Administration, and the U.S. Geological Survey. Selected scour processes and scour design equations are evaluated using 139 measurements of local scour in live-bed and clear-water conditions. Pier-scour measurements were made at 44 bridges around 90 bridge piers in 12 states. The influence of pier width on scour depth is linear in logarithmic space. The maximum observed ratio of pier width to scour depth is 2.1 for piers aligned to the flow. Flow depth and scour depth were found to have a relation that is linear in logarithmic space and that is not bounded by some critical ratio of flow depth to pier width. Comparisons of computed and observed scour depths indicate that none of the selected equations accurately estimate the depth of scour for all of the measured conditions. Some of the equations performed well as conservative design equations; however, they overpredict many observed scour depths by large amounts. Some equations fit the data well for observed scour depths less than about 3 m (9.8 ft), but significantly underpredict larger observed scour depths.


Archive | 1996

CHANNEL SCOUR AT BRIDGES IN THE UNITED STATES

Mark N. Landers; David S. Mueller


Hydraulic Engineering | 1993

Reference Surfaces for Bridge Scour Depths

Mark N. Landers; David S. Mueller


Archive | 2000

PORTABLE INSTRUMENTATION FOR REAL-TIME MEASUREMENT OF SCOUR AT BRIDGES

David S. Mueller; Mark N. Landers


Stream Stability and Scour at Highway Bridges: Compendium of Stream Stability and Scour Papers Presented at Conferences Sponsored by the Water Resources Engineering (Hydraulics) Division of the American Society of Civil Engineers | 1999

U.S. Geological Survey Field Measurements of Pier Scour

Mark N. Landers; David S. Mueller; Everett V. Richardson


Open-File Report | 1996

Bridge-Scour Data Management System user's manual

Mark N. Landers; David S. Mueller; Gary R. Martin


Hydraulic Engineering | 1993

Bridge-Scour Analysis Using the W ater- S urface Pro file (WSPRO) Model

David S. Mueller


Hydraulic Engineering | 1993

Instrumentation for Detailed Bridge-Scour Measurements

Mark N. Landers; David S. Mueller; Roy Trent


Stream Stability and Scour at Highway Bridges: Compendium of Stream Stability and Scour Papers Presented at Conferences Sponsored by the Water Resources Engineering (Hydraulics) Division of the American Society of Civil Engineers | 1999

Detailed Field Measurement of Scour Processes During Floods

David S. Mueller; Mark N. Landers


Proceedings of the Symposium on Fundamentals and Advancements in Hydraulic Measurements and Experimentation | 1994

Real-time data collection of scour at bridges

David S. Mueller; Mark N. Landers

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Mark N. Landers

United States Geological Survey

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