1934•AgEcon Search (University of Minnesota, USA)Open access
Bridge Piers as Channel Obstructions
David L. Yarnell, Yarnell, David L.
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Abstract
IEITect or channel contraction on coefficient_ ___ 16 Backwater occurrent'C!____________________ 2 J,ITect on coefficient oC setting piers lit an~le Principal earlier bridge-pier studi~~____________ 3 with current______________________________ __ 20 Scope oC the investigations_____________________ 4 Use oC data illustrated by exnmples_ .__________ ~'O Example 1_________________________________ 2() Description oC experimental plant_____________ 6 University laboratory_____________________ 6 Example 2________________ .. ______________ 24 Measuring weir____________________________ 6 Summary and conclusions____________________ 24 Pier models_______________________________ 6 Literature cited _________________________ "' ___ .. ~ ~5 Piezometer and piezomoter tubes__________ 7 Annotated reCerences relating to bridge piers 85 channelobstructions_________________________ 26 Theory oC the obstruction oC bridge piers to /low oC water _____________________________________ i Appendix: Test procedure_ __________________________ _____ 10 Energy method oC computing" hrading-up" due to piers ______________________________ 32 EtTect oC shape oC pier on coefficient____________ 11 EtTect oC length-wldtb ratio oC pier on coeffi-Empirical Cormulas and grapbicsolutlons..
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