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• W2317490987 abstract "A limited review of methodologies for design and prediction ofbeach nourishment performance is presented and some recent results of the evolution of the total plan area of a nourishment project on a long straight beach are examined. The emphasis is on rather simple approaches which may be more applicable for preliminary design and screening of candidate designs rather than final design. Most beach nourishment projects are placed at slopes that are steeper than equilibrium. Thus the project is initially out of equilibrium both in the planform and profile. The simple approaches represent the planform evolution and cross-shore processes separately. Planform evolution can be represented by the Pelnard Considere equation, which in addition to providing a basis for representing the performance of a particular design, also provides a good overall basis for understanding the behavior of beach nourishment projects. Several solutions of the Pelnard Considere equation are examined and some of the general results obtainable from this equation are presented and discussed. Particular results include the insensitivity ofevolution to storm sequence, the reduction of spreading “losses” due to refraction around a planform anomaly, relative insensitivity of planform evolution to wave direction for nourishment sand that is compatible with the native, and the effects of nourishing on beaches with sand coarser and finer than the native. Profile evolution is best modeled over short time scales when the profile is significantly out of equilibrium. Limited observations indicate that profile equilibration time scales associated with oversteepened nourished profiles are on the order of 5 years. Application of equilibrium beach profile methodology demonstrates the sensitivity of additional dry beach width to sand size. Recent results of the evolution of the total plan area of a beach nourishment project are presented. It is found that nourishment with sands coarser and finer than the native, results in total plan areas that increase and decrease, respectively, with time. Because the results obtained considering nourishment sands of a single size are unrealistic, a method is applied in which the nourishment sands are characterized by two sizes of different proportions. The results for this approach are more reasonable and consistent with expectations." @default.
• W2317490987 created "2016-06-24" @default.
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• W2317490987 date "1999-04-26" @default.
• W2317490987 modified "2023-09-23" @default.
• W2317490987 title "Beach Nourishment: A Limited Review and Some Recent Results" @default.
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• W2317490987 doi "https://doi.org/10.1061/9780784404119.003" @default.
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