Managing the Retreat from Rising Seas — Blackwater National Wildlife Refuge, Maryland: Blackwater 2100

In 2013, The Conservation Fund, National Audubon Society, and U.S. Fish and Wildlife Service partnered to produce a “salt marsh persistence” report for Blackwater National Wildlife Refuge (NWR) titled Blackwater 2100 to address marsh migration in response to sea-level rise and tidal erosion. Blackwater NWR is a wildlife sanctuary and wetland area of high ecological importance located in Dorchester County, Maryland. Since the 1930s, over 5,000 acres of marsh have been lost at Blackwater NWR. The objectives of the report are to identify areas of current tidal marsh most resilient to sea-level rise and of the highest value to salt marsh bird species as well as future locations that may support marsh migration corridors. The report’s authors utilized several tools, including the Sea-Level Rise Affecting Marshes Model (SLAMM), to select one of three different adaptation strategies for wetland areas within Blackwater NWR to create a comprehensive management plan. The three adaptation strategies include: (1) in-place restoration actions targeted at improving existing tidal marsh health and productivity; (2) strategic conservation in priority marsh migration corridors; and (3) actions supporting the transition of uplands into marsh.

Blackwater 2100 can provide a useful example for natural resources, open space, and coastal managers to plan for minimizing coastal habitat loss due to sea-level rise by evaluating the tradeoffs of different adaptation strategies; and building partnerships with stakeholder groups and the community to examine marsh migration on an ecosystem scale that necessitates public and private land acquisitions and involvement. It may also serve as a model that can be adapted for other coastal locations with different management criteria or priorities.

  

This case study is one of 17 case studies featured in a report written by the Georgetown Climate Center, Managing the Retreat from Rising Seas: Lessons and Tools from 17 Case Studies. Each case study tells a different story about how states, local governments, and communities across the country are approaching questions about managed retreat. Together, the case studies highlight how different types of legal and policy tools are being considered and implemented across a range of jurisdictions — from urban, suburban, and rural to riverine and coastal — to help support new and ongoing discussions on the subject. These case studies are intended to provide transferable lessons and potential management practices for coastal state and local policymakers evaluating managed retreat as one part of a strategy to adapt to climate change on the coast. 

For additional case studies and more information about managed retreat, also see Georgetown Climate Center’s Managed Retreat Toolkit.

Publication Date: 2013

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