Geologic Evidence for Onshore Sediment Transport from the Inner Continental Shelf: Fire Island, New York
Geologic Evidence for Onshore Sediment Transport from the Inner Continental Shelf: Fire Island, New York
复制标题
内陆架陆上沉积物迁移的地质证据：纽约火岛
DOI：
10.2112/jcoastres-d-12-00160.1
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发表时间：
2013
期刊：
影响因子：
2.9
通讯作者：
J. Warner
中科院分区：
文献类型：
--
作者：
W. C. Schwab;W. Baldwin;C. Hapke;E. Lentz;P. Gayes;J. Denny;J. List;J. Warner
Schwab， W.C.；鲍德温,真实再现;Hapke C.J.;Lentz一些;同性恋的看法;丹尼,参考;List, j.h.和Warner， j.c., 2013。内陆大陆架陆上沉积物运输的地质证据：火岛，纽约。沿着纽约火岛南岸的沉积物预算分析，已经在科学和海岸工程文献中进行了几十年的讨论。有充分的证据表明，该系统中泥沙输运的主要组成部分是沿海岸由东向西进行的，但体积泥沙收支计算仍然存在差异。额外的沙子数量，平均约为200,000立方米/年，需要解释堰洲岛西段的增长，这是一个前进的吐槽。沿岸泥沙来源于海岸的上漂侵蚀、海滩营养填充物的增加、内陆大陆架的陆上运输、滨面泥沙，或两者兼而有之，都被认为是平衡泥沙收支赤字所需的额外泥沙的潜在来源。分析2011年收集的高分辨率海底测绘数据，包括地震反射剖面和干涉声呐声学后向散射和带状测深；与1996-1997年海底测绘数据的比较和1933年至2011年的海岸线变化分析支持了之前的建议，即内陆架全新世沉积沉积物可能是解决这种沉积物收支差异的来源。
ABSTRACT Schwab, W.C.; Baldwin, W.E.; Hapke, C.J.; Lentz, E.E.; Gayes, P.T.; Denny, J.F.; List, J.H., and Warner, J.C., 2013. Geologic evidence for onshore sediment transport from the inner continental shelf: Fire Island, New York. Sediment budget analyses along the south shore of Fire Island, New York, have been conducted and debated in the scientific and coastal engineering literature for decades. It is well documented that a primary component of sediment transport in this system is directed alongshore from E to W, but discrepancies in volumetric sediment budget calculations remain. An additional quantity of sand, averaging about 200,000 m3/y is required to explain the growth of the western segment of the barrier island, a prograding spit. Littoral sediment derived from updrift erosion of the coast, addition of beach nourishment fill, and onshore transport of inner continental shelf, shoreface sediments, or both have all been proposed as potential sources of the additional sediment needed to balance the sediment budget deficit. Analysis of high-resolution seafloor mapping data collected in 2011, including seismic reflection profiles and inteferometric sonar acoustic backscatter and swath bathymetry; comparison with seafloor mapping data collected in 1996–1997; and shoreline change analysis from 1933 to 2011 support previous suggestions that the inner-shelf Holocene sedimentary deposit is a likely source to resolve this sediment budget discrepancy.