Tags:Coastal, Nature Base Solutions, Resiliency, Restoration and Wetland
Abstract:
Coastal environments are uniquely vulnerable to climate related impacts (e.g., storm surge, inundation, sea level change) and therefore require careful planning and management to protect communities and valued resources such as coastal habitat. Nature-based solutions (NBS) provide unique opportunities to enhance coastal flood resilience and habitat protection. Some options include the conservation and enhancement of habitat using Natural and Nature-Based Features (NNBF), the use of sediment beneficially, and the integration of NNBF elements into hybrid infrastructure designs. These solutions align with the Army Corps of Engineers (USACE) Engineering with Nature® (EWN®) initiative, and the beneficial use of dredge material (BUDM) mandate to achieve 70% BUDM by the year 2030 (“70/30 Goal”). However, there are many challenges to overcome to meet these objectives. Therefore, the goal of this study was to document NBS practices in coastal Louisiana, USA that successfully applied innovations to achieve multiple benefits while executing the Corps’ navigation mission. Specifically, two studies areas were highlighted that successfully demonstrated the full array of environmental, economic, and social impacts using beneficially used dredged sediments. These projects include 1) creation of bird islands in Baptiste Collette Bayou, and 2) coastal marsh habitat restoration in West Bay. As documented in these project examples, BUDM continues to increase and now is recognized as a critical resource in building large-scale (estimated multi-billion dollar) efforts to mitigate land and habitat losses along the U.S. Gulf coast. Overall, BUDM is being used to more sustainably execute the USACE navigation and ecosystem restoration missions while increasing the resiliency of waterborne transport infrastructure and the communities that rely on them.
Application of Nature-Based Solutions to Enhance Coastal Resiliency in Louisiana