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Coastal and Marine Hazards and Resources Program

Scientists and staff study coastal and ocean processes, from shorelines to the deep sea, to identify hazards and provide critical information on our nation's resources. This work supports preparedness, emergency response, and the protection of people and resources in coastal and ocean environments.

News

A Path to National-Scale Coastal Change Projections

A Path to National-Scale Coastal Change Projections

PCMSC’s Andy O’Neill Receives CSBPA’s Joe Johnson Outstanding Service Award

PCMSC’s Andy O’Neill Receives CSBPA’s Joe Johnson Outstanding Service Award

Repeated Marine Heatwaves Have Dramatically Reshaped Coral Reefs in Hawaiʻi National Parks

Repeated Marine Heatwaves Have Dramatically Reshaped Coral Reefs in Hawaiʻi National Parks

Publications

Storm surge barriers reduce seaward sediment supply to lagoonal estuaries Storm surge barriers reduce seaward sediment supply to lagoonal estuaries

Numerical simulations with realistic forcing of fixed infrastructure for a proposed storm surge barrier for a lagoonal estuary, Jamaica Bay (New York, USA), are analyzed during typical forcing conditions to assess alterations to flow and sediment transport with the barrier open. Lagoonal estuaries are shallow and have modest watershed freshwater and sediment inputs, so sediment delivery...
Authors
David K. Ralston, Philip M. Orton, John C. Warner, Shima Kasaei

Acoustic measurements and modeling of sub-bottom layers on the summit of the Atlantis II Seamount Acoustic measurements and modeling of sub-bottom layers on the summit of the Atlantis II Seamount

Sub-bottom profiler images taken from the summit plateau of the Atlantis II Seamount reveal distinct seabed stratigraphy, including marine sediment, limestone, and basalt layers. Acoustic reflection data also show arrivals reflecting from this sub-bottom structure. A wavenumber integration model with elastic geoacoustic properties is able to reproduce the arrival pattern of seabed...
Authors
Tzu-Ting Chen, Matthew A. Milone, Jason Chaytor, James H. Miller, Gopu R. Potty, William S.. Hodgkiss, Ying-Tsong Lin

Spatial heterogeneity of salt marsh vulnerability to sea-level rise: Dual controls of hydrological setting and salinity regime Spatial heterogeneity of salt marsh vulnerability to sea-level rise: Dual controls of hydrological setting and salinity regime

Salt marsh vulnerability to sea-level rise (SLR) is typically assessed using point measurements of vertical accretion, neglecting three-dimensionality of geomorphic evolution and spatial variability. Recent studies suggest links between vertical and horizontal vulnerability, with differences between oligohaline and polyhaline marshes, yet these relationships remain untested in estuary...
Authors
Dongxiao Yin, Zafer Defne, Neil K. Ganju, John C. Warner, David K. Ralston, Courtney K. Harris, Bin Li

Science

Coastal and Marine Science in Long Island Sound

Long Island Sound is a highly productive estuary and vital natural resource bordering New York and Connecticut. It’s essential for its massive economic impact, generating billions annually by supporting recreation, fisheries, and transportation, as well as its biodiversity, serving as a critical habitat for thousands of marine species. USGS research in Long Island Sound helps protect these...
Coastal and Marine Science in Long Island Sound

Coastal and Marine Science in Long Island Sound

Long Island Sound is a highly productive estuary and vital natural resource bordering New York and Connecticut. It’s essential for its massive economic impact, generating billions annually by supporting recreation, fisheries, and transportation, as well as its biodiversity, serving as a critical habitat for thousands of marine species. USGS research in Long Island Sound helps protect these...
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National Shoreline Change Data Publication Catalog

The U.S. Geological Survey (USGS) maintains shoreline positions for the United States from older sources, such as aerial photos and topographic surveys, and contemporary sources like digital elevation models (DEMs) and lidar elevation point cloud data. It's important to maintain, and make available, records of historical shoreline positions to allow monitoring of change over time, and to identify...
National Shoreline Change Data Publication Catalog

National Shoreline Change Data Publication Catalog

The U.S. Geological Survey (USGS) maintains shoreline positions for the United States from older sources, such as aerial photos and topographic surveys, and contemporary sources like digital elevation models (DEMs) and lidar elevation point cloud data. It's important to maintain, and make available, records of historical shoreline positions to allow monitoring of change over time, and to identify...
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Offshore Analysis of Seafloor Instability and Sediments (OASIS)

The Offshore Analysis of Seafloor Instability and Sediments (OASIS) project is an interagency partnership coordinated by the Bureau of Ocean Energy Management to better understand underwater mudslides and their impacts in the Mississippi River Delta Front. The USGS plays a central role in the project, contributing long-term expertise in coastal and marine geology, seafloor mapping, and geohazard...
Offshore Analysis of Seafloor Instability and Sediments (OASIS)

Offshore Analysis of Seafloor Instability and Sediments (OASIS)

The Offshore Analysis of Seafloor Instability and Sediments (OASIS) project is an interagency partnership coordinated by the Bureau of Ocean Energy Management to better understand underwater mudslides and their impacts in the Mississippi River Delta Front. The USGS plays a central role in the project, contributing long-term expertise in coastal and marine geology, seafloor mapping, and geohazard...
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