Sea levels in the Chesapeake Bay have risen about a foot in the last century—an alarming rate at more than twice the global average. By 2050, models project that we could see an average of two feet of sea-level rise. With more than 7,000 miles of Atlantic and Chesapeake Bay shoreline, our communities across the state are already dealing with flooding, marsh loss, and saltwater damage to agricultural fields.
The Nature Conservancy takes a two-pronged approach to tackling climate change: mitigation and adaptation. We mitigate the acceleration of climate change by working to reduce carbon emissions with renewable energy projects. And we adapt to climate change by using science to understand and adjust to the changes that we know are coming.
We are on the front lines of climate change. Nature can help.
Tidal Wetlands: Quantifying Nature's First Line of Defense
Along Maryland’s Chesapeake and Atlantic coasts, tidal wetlands act as the first line of defense against storms and rising seas. To better quantify how these natural coastal features reduce the impacts of storm surge, TNC partnered with George Mason University (GMU) and the Maryland Department of Natural Resources (DNR) on a wave attenuation study in 2018.
After collecting data for one year from sensors installed on a Deal Island marsh, we found a striking data point: the first few feet of tidal marsh reduced wave height by up to 90 percent.
The success of our Deal Island wave attenuation study has now led to a three-year grant from NOAA’s Effects of Sea Level Rise (ESLR) Program to study and quantify the benefits of coastal habitats across the Chesapeake and Atlantic coasts.
Through this grant, we are working with GMU, Maryland DNR and an advisory committee of regional experts and coastal managers to model how natural coastal features reduce the impact of storm surge and flooding now and into the future considering numerous sea-level rise projections. We will also develop scenario models to assess the effectiveness of different restoration techniques for improving protective coastal habitats.
REPI Challenge: Protecting Marsh Migration Zones
In late 2020, The Atlantic Test Ranges and Naval Air Station Patuxent River were awarded a $3 million grant from the Department of Defense’s Readiness and Environmental Protection Integration (REPI) Program to protect land on Maryland’s Eastern Shore. The funds will be used to purchase easements on 4,000 acres of land, establishing a resilient and connected marsh migration corridor and preventing incompatible development within the Navy’s fly zone. The U.S. Navy will partner with TNC, the U.S. Fish and Wildlife Service and others on the protection effort.
Since the award was announced, TNC has completed a land prioritization mapping exercise to identify the parcels that will provide the highest return on investment for people and nature. With TNC staff working on the ground with landowners, the Maryland REPI partnership is ready to begin the ambitious work of protecting 4,000 acres of critical coastal habitat.
Watch: Nature's Role
Contact
Kelly Leo
Resilient Coasts Program Director
email: kleo@tnc.org
Jackie Specht
Coastal Science Program Manager
email: jackie.specht@tnc.org
Resources
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Resilient Coasts Program Factsheet
Helping our coastal communities plan for and adapt to rising seas.
DOWNLOAD -
Maryland Coastal Resiliency Assessment Factsheet
The statewide assessment results include a Natural Features Analysis, Community Flood Risk Analysis, Marsh Protection Potential Index, and the identification of Priority Shoreline Areas for conservation or restoration actions.
DOWNLOAD
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