环境拥护者说，在气候变化的海平面上升和更频繁的强烈天气事件的情况下，美国陆军工程兵团需要改变其对洪水风险项目的方法。18luck官网

在11月10日letterto迈克尔·康纳（Michael Connor），newly confirmed assistant Army secretary for civil works, the Environmental Defense Fund and dozens of other groups ask Corps officials to “improve and evolve” strategies for addressing current and future flood risks tied to climate change.

这些组织写道：“比以往任何时候都有更多的洪水危险，随着气候变化促进更激烈的飓风和降雨，这种风险正在迅速增长，并且随着海平面上升威胁到全国各地的沿海社区。”

A spokesperson for Connor said the Corps will consider issues raised in the letter. The Corps already is addressing some climate change risks through programs such as与自然的工程.

发言人说：“利益相关者的意见将继续非常重要，因为国家应对当前和未来的洪水风险。”

这些团体说，军团应考虑解决洪水风险的整体方法，指控当前的战略仅着眼于飓风风暴潮，并且与海平面上升相关的短视。拥护者说，军团应在所有沿海风险管理研究中“完全纳入独立和复杂洪水的影响和解决方案”，并将其参数扩展到包括海平面上升和沿海和河流洪泛区的极端风暴。

这些团体还说，这些军团需要优先考虑“自然解决方案”，而不是诸如障碍，堤防和门等结构性的，因为那些没有减轻潮汐洪水，海平面上升和降水的洪水风险。根据团体的信，所谓的“灰色基础设施”可能会产生负面影响，例如限制动物的运动，改变潮流或栖息地退化。

相反，他们说，基于自然的功能可以提供防止风暴的保护，这表明2008年的一项研究估计美国沿海湿地每年提供232亿美元的风暴保护福利。新利luck军团成本分析可能会忽略其他好处，例如栖息地多样性，改善水质，碳固存，甚至娱乐和旅游业。

“在我们迅速改变气候的世界中，上一个世纪的标准洪水风险降低操作程序已不再足够，” EDF气候弹性海岸和流域副总裁Natalie Snider在一份声明中说。

The Corps has already started looking at nature-based flood risk management, releasing in September in its与自然的工程initiative, the 1,000-page “International Guidelines on Natural and Nature-Based Features for Flood Risk Management.” It highlights use of natural features along coasts such as beaches and dunes, coastal wetlands, islands, reefs and aquatic vegetation, as well as river, floodplain and wetland restoration and other nature-based solutions for fluvial systems.

十月，军团释放了气候适应and Resilience Plan作为拜登政府面对气候危机的目标的一部分。该计划呼吁该机构采取诸如现代化计划以支持气候富裕投资的行动，并在计划工作时使用有关预计气候相关变化的信息。

军团以前对这些问题遭到批评。

When its New York District released a draft report following 2012's Superstorm Sandy on a plan for a $119-billion sea wall with gates from Queens to New Jersey, some officials criticized it as only addressing storm surge that would be insufficient to protect New York City from rising sea levels. In Texas, where the Corps has proposed a $28.87-billion plan with barriers and gates along the Gulf Coast, local experts have said additional defenses such as in-bay island barriers made of dredge material are needed as well.

EDF and the other groups say current Corps approaches to flood risks also don’t consider systemic inequities. Low-income communities and those of color are at greater flood risk and have more difficulty recovering from flood events. their letter states. The groups want the Corps to consider social costs and modify its cost-benefit analysis and decision-making processes to address equity, or to even waive benefit-cost ratio requirements for underserved communities to avoid bias in property values.

“The economic, environmental and social costs of ignoring the multiple flood threats impacting our coastal and riverine communities is astronomical,” the letter states. “We need to act now to take more holistic, equitable and long-term approaches to meet the very real and severe threats of a changing climate.”