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Morphodynamics of barrier-inlet systems in the context of regional sediment management, with case studies from west-central Florida, USA

机译：在区域沉积物管理的背景下，屏障入口系统的形态动力学，以美国佛罗里达州中西部的案例研究为例

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The temporal and spatial scales controlling the morphodynamics of barrier-inlet systems are critical components of regional sediment management practice. This paper discusses regional sediment management methods employed at multiple barrier-inlet systems, with case studies from West-Central Florida. A decision-support tool is proposed for regional sediment management with discussion of its application to barrier-inlet systems. Connecting multiple barrier islands and inlets at appropriate spatio-temporal scales is critical in developing an appropriately scoped sediment management plan for a barrier-inlet system. Evaluating sediment bypassing capacity and overall inlet morphodynamics can better inform regional sand sharing along barrier-inlet coastlines; particularly where sediment resources are scarce and a close coupling between inlet dredging and beach placement is vital to long-term sustainable management. Continued sea-level rise and anthropogenic activities may intensify the need for investigating longer-term processes and expanding regional planning at a centennial timescale, and are acknowledged as challenging tasks for RSM studies. Specifically, we suggested that a regionally focused, multi-inlet study were necessary for management plan of individual inlet for the west-central Florida case studies. Key recommendations based on the case studies include: 1) allow the natural sediment bypassing to be re-established at Blind Pass inlet through reduced ebb-tidal delta mining, 2) reduce the interruption to sediment bypassing at John's Pass and Pass-a-Grille inlets through an improved design of the dredged mining areas located along sediment bypassing pathways, 3) allow for continued natural sediment bypassing at Bunces Pass, and, 4) incorporate the cyclic swash-bar attachment sediment bypassing into the management plan at Bunces Pass and adjacent barrier-islands.
机译：控制屏障入口系统形态动力学的时空尺度是区域沉积物管理实践的关键组成部分。本文以佛罗里达州中西部的案例为基础，讨论了在多种屏障入口系统中采用的区域沉积物管理方法。提出了一种用于区域沉积物管理的决策支持工具，并讨论了其在屏障入口系统中的应用。以适当的时空尺度连接多个屏障岛和入口对于制定屏障入口系统的适当范围的沉积物管理计划至关重要。评估沉积物的绕过能力和总体入口形态动力学可更好地为沿屏障入口海岸线的区域性沙粒共享提供信息。尤其是在沉积物资源稀缺且入口疏inlet与海滩布置之间紧密联系的情况下，对于长期可持续管理至关重要。持续的海平面上升和人为活动可能会加剧对长期过程进行调查并在百年时间尺度上扩大区域规划的需求，这被认为是RSM研究的艰巨任务。具体而言，我们建议针对佛罗里达州中西部案例研究的单个进气口管理计划，需要进行区域性，多进气口研究。基于案例研究的主要建议包括：1）通过减少潮汐三角洲开采，在盲道入口重新建立天然沉积物旁路，2）减少在John's Pass和Pass-a-Grille对沉积物旁路造成的干扰通过沿泥沙绕行路径设置的疏mining矿区的改进设计设计的入口，3）允许在Bunces Pass继续进行天然泥沙绕开，并且，4）将循环斜拉杆附件泥沙绕过纳入Bunces Pass及其附近的管理计划屏障岛。

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