Adapting to Sea Level Rise Joseph F Bouchard

Adapting to Sea Level Rise Joseph F. Bouchard, Ph. D. Captain, U. S. Navy (Ret. ) Presentation to the Virginia Ship Repair Association June 21, 2011

Overview • Impact of Sea Level Rise • Adaptation Strategies • Adaptation Efforts in Hampton Roads

Focus on Sea Level Rise The Historical Record: Sea Level Rise in Chesapeake Bay Projected increase through 2100: About 0. 7 to 1. 6 m (2' 4" to 5' 3") Source: Chesapeake Bay Program Science and Technical Advisory Committee (STAC), “Climate Change and the Chesapeake Bay: State-of-the-Science Review and Recommendations, ” April 21, 2008, pp. 18, 81.

Sea Level Rise in Chesapeake Bay Is It Accelerating? Source: John Boon, Ph. d. , “Sea Coast And Sea Level Trends, ” 2008, pp. 4, 5. Dr. Boon is Professor Emeritus, Virginia Institute of Marine Science, College of William and Mary, School of Marine Science

USGS Coastal Vulnerability Index The Coastal Vulnerability Index shows the relative vulnerability of the coast to future rise in sea-level. Most of the Virginia Coast is Very High Risk. Source: US Geologic Survey, “National Assessment of Coastal Vulnerability to Sea-Level Rise: Preliminary Results for the U. S. Atlantic Coast, ” U. S. Geological Survey Open. File Report 99 -593. E. Robert Thieler and Erika S. Hammar-Klose, Woods Hole, Massachusetts, 1999. http: //pubs. usgs. gov/of/1999/of 99 -593/

Mid-Atlantic Region is Especially Vulnerable Rising sea level and the potential for stronger storms pose an increasing threat to coastal cities, residential communities, infrastructure, beaches, wetlands, and ecosystems. The potential impacts to the United States extend across the entire country: ports provide gateways for transport of goods domestically and abroad; coastal resorts and beaches are central to the U. S. economy; wetlands provide valuable ecosystem services such as water filtering and spawning grounds for commercially important fisheries. In the mid-Atlantic region from New York to North Carolina, tide-gauge observations indicate that relative sea-level rise (the combination of global sealevel rise and land subsidence) rates were higher than the global mean and generally ranged between 2. 4 and 4. 4 millimeters per year, or about 0. 3 meters (1 foot) over the twentieth century. U. S. Climate Change Science Program, Coastal Sensitivity to Sea-level Rise: A Focus on the Mid-Atlantic Region, pp. 1 -2 January 16, 2009. http: //www. climatescience. gov/Library/sap 4 -1/final-report/#finalreport

Risk to Hampton Roads from Sea Level Rise: #2 in the United States

Risk to Hampton Roads from Sea Level Rise: #10 in the World

Absolute vs. Relative Sea Level Change The Difference Matters a lot in Hampton Roads • Absolute • Observed change in sea level rise caused only by changes in sea level • Relative • Observed changes in sea level rise cause by two factors: • Change in sea level • Change in ground level • Relative sea level is more important in Hampton Roads because of subsidence – the land is sinking as sea level rises • Causes of subsidence: • Tectonic plate tilting • The Chesapeake Crater • Ground water depletion

Impact of Sea Level Rise (I) Inundation

Impact of Sea Level Rise (II) Shoreline Erosion

Impact on the Insurance Industry The Insurance Industry is Factoring Sea Level Rise into Risk Assessments

Impact on Norfolk

Norfolk & Portsmouth Hurricane Storm Surge Sea level Rise Increases Storm Surge

Impact on the Virginia Beach Oceanfront Source: Skip Stiles, Wetlands Watch

Impact on the Northrop Grumman Shipyard

Adaption Recommendations Governor’s Commission on Climate Change Adaptation and Sequestration Working Group Recommendations • Acquire high resolution topographic data for all of coastal Virginia (LIDAR) • Base all State and Local planning on: • Temperature increase of approximately 3. 6°F • Sea level rise of 2. 3 feet, but tailored to local relative sea level rise • Greater instability in weather patterns and precipitation • Closely monitor trends and adjust policies as necessary

Adapting to Sea Level Rise: Protect

Adapting to Sea Level Rise Accommodate

Adapting to Sea Level Rise Retreat

Adaptation Efforts in Hampton Roads: Hampton Roads Planning District Commission Climate change will be one of the greatest challenges for Hampton Roads, the United States, and the world to deal with over the next century. Climate change is already occurring and will continue to have large impacts on populations around the world. Planning for climate change now may help mitigate its impacts while also reducing the costs of any necessary adaptation. http: //www. hrpdc. org/Documents/Phys%20 Planning/2010/Climate_Change_Final_Report_All. pdf

Norfolk has Launched Adaptation Planning

Transportation Risk Assessment

Langley Air Force Base: Protect Daily Press Langley AFB wants $5. 5 million in flood protection By David Macaulay April 7, 2010 Langley Air Force Base is seeking more than $5 million in federal funds to protect it against storm surges that have caused massive damage at the base in past years. Projects: • Shoreline stabilization: “Living shoreline” • Replace existing seawall • Reinforcement under takeoff and landing zones Hurricane Isabel Flooding at Langley AFB, September 2003

Naval Station Norfolk Piers: Accommodate As sea level has risen over the last 60 years, utilities suspended beneath old single deck piers have become increasingly vulnerable to damage from sea water immersion and are less accessible for maintenance. Utilities suspended from upper deck. 21 feet above sea level On old single deck piers utilities are suspended below the deck, close to the water. Images Source: Naval Facilities Engineering Command, Atlantic Division https: //portal. navfac. navy. mil/portal/page/portal/navfac_ww_pp/navfac_navfaclant_pp/tab 36140/piers. pdf

We Have Been Warned! Rear Admiral David W. Titley, Ph. D. Oceanographer of the Navy Director, Task Force Climate Change “Climate Change and the U. S. Navy” December 2, 2010 Old Dominion University

Conclusions Regardless of what you may think about the causes of climate change, remember this: • Sea level rise and inundation increase can be seen and measured in Hampton Roads – they are happening now. • DOD and the Navy take it seriously and are already spending hundreds of millions to adapt to sea level rise and inundation. • Economic loss from failure to adapt is much greater than the cost of adaptation. Adaptation planning is long overdue. • Effective adaptation plans will have an increasing impact on the competitiveness of shipyards. • The Navy is already looking into the impact of inundation on shipyards and ship repair contracts. Shipyards that adapt will win, shipyards that fail to adapt will fail.

Questions? Navy Task Force Assesses Changing Climate By Bob Freeman, Special to American Forces Press Service, July 31, 2009 Rapidly diminishing sea ice, melting glaciers, rising sea levels, increased storm severity -- all are possible consequences of a climate that mounting evidence suggests is changing significantly. As the scientific community works to understand the changing climate, the chief of naval operations has created a task force, headed by Rear Adm. David Titley, the Navy's senior oceanographer, to better understand evaluate its implications for maritime security. “Task Force Climate Change was initiated … to assess the Navy’s preparedness to respond to emerging requirements, and to develop a sciencebased timeline for future Navy actions regarding climate change, ” Titley explained in a July 28 interview. Two merchant ships transit Northeast Passage Summer 2009

Climate Change in Coastal Virginia Air and Water Temperature By 2080~2100 Air temperature increase of about 3. 6° F, range of 2. 5° F to 5. 3° F Sea Level Rise By 2100: About 1 m, range 0. 7 to 1. 6 m (About 3’ 4”, range 2' 4" to 5' 3”) Unstable Weather Patterns Variability in precipitation patterns Frequency of extreme weather events Intensity of extreme weather events

Major Storms in H. R. , 1970 -2008