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Science Brings Clarity to Shifting Shores
Homes After Hurricane Isabel

Houses in Rodanthe, NC, are left in the waves at the ocean’s edge following the passage of Hurricane Isabel, which made landfall as a category 2 storm in the Outer Banks on September 18, 2003. Photo Credit: Hilary Stockdon, USGS

Each and every day, waves move sand back and forth, onto and away from beaches. The thin ribbon of sandy barrier islands and beaches along America’s coastline shifts constantly, especially during hurricanes, nor’easters, and other extreme storms.

How vulnerable is your favorite beach if a hurricane like Katrina, Ike, or Sandy paid a visit? What did your beach look like 50, 100, or 150 years ago? What might it look like in the future? Since more than 40% of the nation’s population lives in coastal counties on both the East and West Coasts, answering questions like these will help protect millions of citizens who are at risk from changing sea level, retreating shorelines, and extreme coastal storms.

To help ensure safe and resilient coasts, the U.S. Geological Survey (USGS) has created an online tool that allows anyone to interactively “see” past, present and future hazards. This tool — the USGS Coastal Change Hazards Portal — can aid in decisions that involve emergency preparedness, ecosystem restoration, and where and how to develop coastal areas.

No sophisticated technology is required. The tool runs on web browsers, tablets, and smartphones. It is designed for a wide-range of audiences, from federal and state agencies to non-governmental organizations, public entities, and private citizens.

“Our nation’s coastlines are constantly changing landscapes that pose unique management challenges,” said Suzette Kimball, USGS acting director. “This new USGS portal is truly one-of-a-kind, providing a credible foundation for making decisions to protect resources, reduce risk, and prevent economic losses.”

“Essentially, the portal is an interactive mapping product with layers of information, but don’t let that simple explanation be deceiving,” Kimball continued. “The portal is unique in that it compiles a diverse array of science — science that is unbiased — to provide a comprehensive picture needed to visualize and understand how coasts behave under various conditions.”

Hurricane Irene Makes Landfall

Upper aerial photograph shows Rodanthe, NC, looking south along the coast on August 30, 2011, three days after landfall of Hurricane Irene. The central and lower aerial photographs show pre-storm and post-storm extreme coastal change, with the yellow arrow in all 3 photographs pointing to the same cottage. Photo Credit: Karen Morgan, USGS

How It Works

One key component of the portal is the ability to explore coastal hazard risks at varied scales, from a local area of interest to a national perspective. This location-specific capability is extremely valuable for planning and preparedness and for making decisions to build coastal resilience.

For example, if a hurricane alert is issued, users can input their city and state to see maps and imagery of potential impacts for a similar storm scenario. If an individual is planning to move to a beach, they can type a location into the portal to view what types of coastal hazards and impacts have occurred nearby. The Coastal Vulnerability Index feature shows the relative susceptibility of the Nation’s coasts to sea- level rise. Resource managers can also make decisions on how best to protect precious ecosystems. These are just a few ways the portal may be utilized.

Video Tutorial

The following short video demonstrates how a resident in Rodanthe, NC, can use the portal to answer the question: As a long-term resident in this coastal community on the Outer Banks, how much beach erosion is occurring in my community?

Technology Sets Sail — New ‘Mashup’ Capabilities

A range of information is provided through the portal, such as historical data, existing publications, satellite imagery, maps, and more. This ‘mashup’ of information is possible due to the wide scope of USGS expertise. For example, USGS scientists have completed a national research project that measures and interprets coastline change from the past 150-plus years.  By looking to the past, scientists have direct evidence of how our diverse shorelines have behaved, allowing for more accurate analyses of future change. The USGS also investigates coastal change during extreme storms to help understand hazards such as severe beach erosion, island overwash, or coastal inundation. The portal will enable users to view USGS science in conjunction with their own personalized data to answer specific questions.

Partnerships are Essential

The maintenance of an accurate and up-to-date portal relies on relationships with federal agencies and many non-governmental organizations. This cooperation includes, for example, the incorporation of current forecasts from the National Weather Service along with corresponding coastal change forecasts from the USGS, a key partnership that will help in achieving near-real-time predictions of coastal change when hurricanes approach.

Similar collaborations are also necessary to make sure the portal addresses the needs of information users. For example, refuge managers at the U.S. Fish and Wildlife Service will be able to use this tool in combination with many of their own mapping products to develop an appropriate forecast for endangered species and resource management. Managers with the National Park Service can apply these data to evaluate how to reduce or prevent vulnerabilities at specific facilities or cultural resources due to exposure to coastal hazards.

The information provided through the portal also enables state agencies to improve their ability to monitor and assess their coastlines. “The ability to easily locate and access USGS research and data through the new Coastal Change Hazards Portal is of great value for coastal managers,” said Massachusetts Office of Coastal Zone Management Director Bruce Carlisle. “This information directly supports our work with local cities and towns to assess risk and communicate current and future hazards.”

Future Portal Plans and Enhancements

Coastlines are constantly changing landscapes that pose unique management challenges requiring fresh information. The USGS Coastal Change Hazards Portal is designed to be continually updated with the most current catalogues of information and tools that can be used to evaluate risk and inform actions that lead to improved coastal resilience.

In the future, the portal will evolve into an even more advanced web tool to forecast shoreline variations and provide managers and planners with information they need to protect resources, reduce risk, and prevent economic losses. Future refinements will sharpen information to the highest resolution available and provide capabilities for real-time storm vulnerability assessments.

Start with Science

Informed management and policy decisions require expert science as their foundation. The USGS is dedicated to addressing this need and providing unbiased coastal science. The USGS Coastal Change Hazards Portal is one way the USGS continues to work on Hurricane Sandy impacts and recovery. The Portal is an internal partnership between the Coastal and Marine Geology Program, which develops the data and understanding to forecast coastal change, and the Center for Integrated Data Analytics, which provides the advanced software development and delivery capabilities to ensure USGS science is available as widely and effectively as possible.

Get Onboard and Explore

Follow the link below to investigate the coast and learn more about impending hazards:

USGS Coastal Change Hazards Portal

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Page Last Modified: February 2, 2011