Countermeasure Calculations and Design

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Selecting a Countermeasure• depends on Erosion Mechanism, Stream Characteristics, Construction and Maintenance Requirements, Vandalism, and Costs
Countermeasures for MeanderMigration• bank revetments,• spurs,• retardance structures,• longitudinal dikes,• vane dikes,• bulkheads,• channel relocations, and• a carefully planned cutoff
Page 1: Countermeasure Calculationsand Desi
Page 5 and 6: Example of River MeanderFHA (1978)
Page 7 and 8: Countermeasures ForDegradation• C
Page 9 and 10: Degradation Failure,Ariz.FHA (1978)
Page 11 and 12: Countermeasures to ControlAggradati
Page 13 and 14: Countermeasure to ControlContractio
Page 15 and 16: Contraction Scour Schematic• Orig
Page 17 and 18: Bendway Wiers/ Stream BarbsFlow goe
Page 19 and 20: Bank-Hardening: Riprap• Use round
Page 21 and 22: Spurs Flow goes around to re-direct
Page 23 and 24: River-Training: Groynes/SpurDikesPh
Page 25 and 26: Guidebanks For use when embankments
Page 27 and 28: GuidebankFHA (1978) “Countermeasu
Page 29 and 30: Geobags-Pervious Bags Filledwith Gr
Page 31 and 32: NCHRP Reports Published onBridge Sc
Page 33 and 34: More NCHRP Reports• Countermeasur
Page 35 and 36: Bank Hardening: Cable-TiedBlocks•
Page 37 and 38: Flow Altering: SubmergedVanes• Cr
Page 39 and 40: Flow Altering: Delta Wings• Creat
Page 41: Grade-Control StructureBeforeSmall

Countermeasure Calculations and Design

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