Cyclic geomorphic patterns of washover on a barrier Island in southeastern North Carolina
Cyclic geomorphic patterns of washover on a barrier Island in southeastern North Carolina
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北卡罗来纳州东南部障壁岛冲刷的循环地貌格局
DOI：
10.1007/bf02430662
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发表时间：
1977
期刊：
影响因子：
--
通讯作者：
W. J. Cleary
中科院分区：
文献类型：
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作者：
P. E. Hosier;W. J. Cleary
对历史航空照片的详细分析为确定北卡罗来纳州东南部梅森博罗岛上海洋冲刷的规模和重要性提供了数据。冲刷在时间和空间上都是分布的，在岛屿的地面部分产生了一套地貌特征。可识别的四种地形类型包括：A)小聚生的疏松植被的沙丘，B)完整的、植被良好的沙丘和梯田，C)单独的孤立的洗涤扇形，以及D)洗涤梯田。包括灌木灌丛和黑色针茅沼泽在内的植被模式与古老的扇形场地有关。以盐碱地、细线草和黄花为主的地点与最近的过度冲刷有关。过程-响应模型综合了地形类型和植被模式，为该岛的管理计划提供了输入。根据洗涤器的历史和未来洗涤器的潜力，描绘了梅森博罗岛的五个部分。梅森博罗岛对溢流的反应与北卡罗来纳州核心滩的观测结果相似；但也有几个不同之处，可能是因为沙丘脊在冲刷后重新发育的速度很快。
A detailed analysis of historic aerial photographs provided the data for determining the magnitude and importance of oceanic overwash on Masonboro Island, southeastern North Carolina. Overwash, which is both temporally and spatially distributed, produces a suite of physiographic features on the subaerial portion of the island. Four physiographic types are recognized including: A) small coalescing loosely vegetated dunes, B) intact, well-vegetated dunes and terraces, C) individual, isolated washover fans, and D) washover terraces. Vegetation patterns, including shrub thickets and black needle rush marshes are related to old fan sites. Sites dominated by saltmeadow cordgrass and goldenrod are associated with recent overwashes. A process-response model, which synthesizes the physiographic types and vegetation patterns, provides input for a management program for the island. Five sections on Masonboro Island are delineated on the basis of washover history and potential for future washovers. The response of Masonboro Island to overwash is similar to that observed on Core Banks, North Carolina; however there are several differences, probably because of the rapidity with which dune ridges redevelop after washovers.