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Measurements of Bridge-Scour Depths in Mississippi

by K. Van Wilson, Jr., (M.ASCE),



Document Type: Proceeding Paper

Part of: North American Water and Environment Congress & Destructive Water

Abstract:

This paper briefly summarizes 190 measured pier-scour depths collected dur ing 1942?94 at 22 selected bridges in Mississippi and presents an envelope-curve equation for the data. The envelope-curve equation was developed by relating pier-scour depth divided by normal pier width to approach-flow depth divided by nor mal pier width. Measured pier-scour depths were compared to pier-scour depths predicted by the pier-scour equation currently recommended in the Federal High way Administration Hydraulic Engineering Circular No. 18 and pier-scour depths predicted by the envelope-curve equation.

Subject Headings: Piers | Scour | Hydraulic engineering | Data collection | Building envelope | Bridges | Rivers and streams | Mississippi | United States | Mississippi River

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