Barrier Island Migration and Morphologic Evolution, Fire Island Inlet, New York
Barrier Island Migration and Morphologic Evolution, Fire Island Inlet, New York
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障壁岛迁移和形态进化，火岛湾，纽约
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
G. Zarillo
中科院分区：
文献类型：
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作者：
Jamie M. Bonisteel;Michelle Peters;G. Zarillo
纽约州火岛湾是一个重叠的障碍式进水口系统，进水口航道位于东西方向，火岛在南面和东面，雪松岛和琼斯海滩在北面和西面。这项研究的主要目的是考察在几十年的时间尺度上入口地貌和邻近海岸线行为对入口稳定的响应。这项研究量化了火岛湾周围地区的进水口迁移、唾液扩展和海岸线变化，描述了对进水口系统的主要长期影响，并解释了工程作业对邻近海岸线位置的影响。分析是使用ESRI Arcview tm地理信息系统和专门为此目的开发的BeachTools扩展程序进行的。可用于进行这一分析的数据包括1936年至今的航空摄影、1834年以来美国海岸和大地测量局土地勘测的历史海岸线数据、NOAA水文勘测的地形数据和最近的浅滩数据。火岛湾的演变呈下移冲刷和上移堆积的趋势。1941年在火岛西端增加了一个码头，1959年在海湾内修建了一条沙堤，但这并没有阻止这一趋势。多余的沉积物绕过码头，进入进水口区域，形成唾沫和浅滩。这剥夺了橡树海滩和吉尔戈海滩向下漂移区域的沉积物。
Fire Island Inlet, New York, is an overlapping barrier inlet system where the inlet channel lies on an east-west orientation with Fire Island to the south and east and Cedar Island and Jones Beach to the north and west. The main purpose of this study was to examine the response to inlet stabilization of inlet geomorphology and adjacent shoreline behavior over a time scale of decades. This study quantifies inlet migration, spit extension, and shoreline change in the areas surrounding Fire Island Inlet, describes major long-term influences to the inlet system, and interprets the consequences of engineering operations to the position of neighboring shorelines. The analysis was performed using ESRI Arcview tm GIS and the BeachTools extension, which was developed specifically for this purpose. The available data to perform this analysis consisted of aerial photography covering the period from 1936 to present, historical shoreline data from the U. S. Coast & Geodetic Survey land surveys dating back to 1834, and topographic data from NOAA hydrographic surveys and recent SHOALS data. Fire Island Inlet’s evolution has been a trend of downdrift erosion and updrift accretion. The addition of a jetty on Fire Island’s western tip in 1941 and a sand dike within the inlet in 1959 did not halt this trend. Excess sediment bypasses the jetty and migrates into the inlet area, forming spits and shoals. This deprives the downdrift areas of Oak Beach and Gilgo Beach of sediment.