Scour at Contracted Bridges (2006) / Chapter Skim
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1 CHAPTER 1: INTRODUCTION Current application of scour prediction methods overestimates scour depths around abutments and in contracted openings at many locations. Such excessive scour depth prediction results in construction of unnecessarily deep foundations or installation of unnecessary countermeasures.
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2 Error in prediction of scour components stems from three sources: (1) estimation of hydraulic parameters, typically through hydraulic modeling; (2)
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3 bed material. The complexity of the erosion resistance of bed material has been marginally included into scour-prediction equations.
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4 (1) to describe and quantify the influence of processes affecting scour magnitude in contracted openings using field data; (2)
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5 reach affected by the bridge where flood and site conditions permitted (4 of 15 sites)
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6 The research team provided recommendations for future research that will advance scour prediction methods. These recommendations include suggested modifications to the Strategic Plan for Scour Research to reflect the findings of this research.
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