美国陆军工程兵团制定的一项暂定计划要求将大部分南卡罗来纳州查尔斯顿（Charleston）的大部分地区敲响，以防止暴风雨的墙壁敲响，以捍卫该市市中心的未来洪水。

The Corps estimates the cost of the entire project at $1.1 billion. Officials say the “optimized” plan is cheaper, adds more resilience and has a better cost-benefit ratio than other options considered by the study.

Downtown Charleston is located on a mostly flat, low-lying peninsula between the Ashley River, Cooper River and Charleston Harbor. Several hospitals are located in the flood-prone areas, and there are more than 12,000 structures collectively worth billions of dollars on the peninsula. The area sometimes experiences tidal flooding even without a storm, and the Corps study warned that a coastal storm making landfall at high tide “could be catastrophic for the community.”

查尔斯顿地区的军团开始研究2018年对半岛的沿海风暴影响。新利18备用可行性报告草案and environmental impact statement, released on Sept. 10, proposes building a 12-ft-elevation storm-surge wall around the perimeter of the peninsula.

“这是建立持久的沿海resilienc而设计的y for the medical community and all residents and businesses,” said Lt. Col. Andrew Johannes, commander and district engineer in a statement.

大多数障碍物将是带有混凝土茎壁和桩支撑底座的T壁。墙将像历史悠久的电池墙一样将墙绑在现有的高地。在沼泽中，障碍物将是一个类似于内港导航运河屏障的组合墙，由风暴潮一侧的连续垂直桩组成，另一侧撞击，由混凝土盖连接。车辆和行人会有潮流的门，可以在预期的暴风雨前关闭。在墙壁的内侧，泵设施将防止洪水泛滥。

The plan also calls for oyster reef-based living shoreline sills to be created in some areas to reduce storm impacts on natural shorelines and marsh.

This is not the only strategy Charleston has pursued to mitigate flooding. As ENR previously reported, the city has undertakendrainage improvement projects旨在处理比目前水平高2英尺的海平面。

关于军团提案的公众审查和评论期开放至10月25日。此后，该机构预计将在2022年5月发布最终报告，然后再提交调查结果并计划向国会提交。