Minimizing Roadway Embankment Damage from Flooding (2016) / Chapter Skim
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Pages 70-73
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From page 70... ...
68 CHAPTER NINE DESIGN CONSIDERATIONS the section "Modes of Failure" in chapter eight, the most effective approach to choose the design flood is the risk approach. Targeting a risk of 0.001 fatalities per year and $1,000 in the United States per year may be acceptable target risk values.
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From page 71... ...
69 Where PoEy is the target PoE coming from Equation 9.1 with y being the number of years for the design life of the embankment. Now that the return period of the flood is known, the design can proceed for each one of the failure modes identified in Figure 109.
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From page 72... ...
70 constant sheet flow overtopping. In this case, the mean water level is lower than the embankment height but the waves can still overtop the crest.
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From page 73... ...
71 • Armoring the slope (Nevada) • Keeping the subbase above design flood level (Tennessee)
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