Long Term Assessment of Beach Nourishment Project Performance
Long Term Assessment of Beach Nourishment Project Performance
复制标题
海滩滋养项目绩效的长期评估
DOI：
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发表时间：
1991
期刊：
影响因子：
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通讯作者：
Garry W. Holem
中科院分区：
文献类型：
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作者：
D. Stauble;Garry W. Holem
已收集并分析了Indialantic/墨尔本海滩海滩营养项目的剖面响应、沉积物分布和波浪信息的长期数据，以正确评估随时间推移的填充体积保留和填充粒度稳定性的历史。1980年冬季，沿着佛罗里达州布雷瓦德县（位于卡纳维拉尔角以南43公里处）3.4公里的海滩，填充了195，060立方米的填充物。借用材料来自高地，并通过卡车运输放置在设计剖面上。在填充物放置后5个月至7年的项目长期监测包括近季度的剖面，以及包括重大风暴事件的额外剖面。在此期间观察到的夏季吸积和冬季侵蚀的季节性。风暴频率是控制因子的填充率从前滨删除。由于每次风暴，较粗的填充材料被暴露，并沿填充放置区沿着重新引入。前滩沉积物样品组成表现出沿着变粗的季节性趋势。通过对该海滩营养项目的长期系统监测，可以深入了解填充模板的初始快速调整、填充剖面和沉积物调整的季节性和风暴变化、针对风暴条件提供的项目响应和保护以及填充性能的时间寿命。这种类型的数据是必要的，以改善填充放置的设计概念，设计护堤模板，取土区的适用性和项目寿命的时间预测。
Long-term data on profile response, sediment distribution and wave information have been collected and analyzed for the Indialantic/Melbourne Beach beach nourishment project in order to properly assess the history of fill volume retention and fill grain size stability through time. A fill volume of 195,060 m 3 was placed in the winter of 1980 along a 3.4 km section of beach in Brevard County, Florida, located 43 km south of Cape Canaveral. The borrow material was from an upland source and was placed by truck haul on the design profile. The longer-term monitoring of the project from five months to seven years after fill placement consisted of near-quarterly profiles, with additional profiles bracketing significant storm events. A seasonality of summer accretion and winter erosion was observed during this period. Storm frequency was the controlling factor in rate of fill removed from the foreshore. As a result of each storm, coarser fill material was exposed and reintroduced along the fill placement zone. Foreshore sediment sample composites showed a seasonal trend along with coarsening after each storm. The systematic monitoring of this beach nourishment project over the long-term provided insight into initial rapid readjustment of the fill template, seasonal and storm variability in fill profile and sediment adjustment, project response and protection provided to storm conditions, and the temporal longevity of fill performance. This type of data is necessary to improve design concepts of fill placement, design berm templates, borrow area suitability and temporal prediction of project lifespan.