Coasts

Filter Total Items: 279
Date published: May 15, 2021
Status: Completed

Alaska North Slope LiDAR

High-resolution light detection and ranging (lidar) elevation data were acquired along the north coast of Alaska between 2009 and 2012. The lidar acquisition, from Icy Cape, Alaska to the United States/Canadian border, comprised approximately 11,000 km2. The airborne lidar data were acquired in support of the U.S. Geological Survey...

Date published: September 19, 2019
Status: Active

Using Video Imagery to Study Coastal Change: Sunset State Beach

Two video cameras overlook the coast at Sunset State Beach in Watsonville, California. Camera 1 looks northwest while Camera 2 looks north. The cameras are part of the Remote Sensing Coastal Change project.

Date published: September 18, 2019
Status: Completed

Topobathymetric Elevation Model of Mobile Bay, Alabama

Mobile Bay is ecologically important as it is the fourth largest estuary in the United States. The Mobile Bay topobathymetric digital elevation model (TBDEM) was developed in collaboration between U.S. Geological Survey (USGS) Coastal and Marine Geology Program (CMGP) and USGS National...

Date published: September 18, 2019
Status: Completed

Hurricane Sandy Region - Topobathymetric Elevation Model of New Jersey / Delaware

Hurricane Sandy severely impacted the New Jersey/Delaware coast, altering the topography and ecosystems of this heavily populated region. In response to the storm, the U.S. Geological Survey (USGS) Coastal and Marine Geology Program in collaboration with USGS National Geospatial Program , and ...

Date published: September 16, 2019
Status: Completed

Hurricane Sandy Region - Topobathymetric Elevation Model of New England

Hurricane Sandy significantly impacted coastal New England from Connecticut to as far north as Maine altering the topography and ecosystems of this heavily populated region that includes both New York and Boston. In response to the storm, the U.S. Geological Survey (USGS) Coastal and Marine Geology Program in collaboration with ...

Date published: September 16, 2019
Status: Completed

Shoreline Definition in Emergent Wetland Environments

Coastal shoreline mapping is a particularly complex issue because of the dynamic nature of water levels at the land-water interface, the various tidal vertical datums in use, and the spatial scale of the shoreline delineation. In addition, the definition of a shoreline varies depending on whether the shoreline will be used for nautical charts and navigation, delineating the legal federal and...

Date published: September 16, 2019
Status: Completed

Shoreline Definition of Inland Water Bodies Not Hydrologically Connected to the Ocean

Most airborne topographic light detection and ranging (lidar) systems operate within the near-infrared spectrum. Laser pulses from these systems frequently are absorbed by water and do not generate reflected returns on water bodies in the resulting lidar point cloud. Thus, the absence of lidar returns over water is useful for identifying inland water bodies that are not connected by any path...

Date published: September 16, 2019
Status: Completed

Hydrologic-Enforcement of Lidar DEMs

Hydrologic connectivity of light detection and ranging (lidar)-derived elevation data is critical for coastal hydrologic modeling applications. However, unless hydrologically-enforced, raised structures (i.e. bridges, roads overlaying culverts) can block overland flow to coastal waters. Because highly detailed lidar-derived elevation surfaces include features such as bridge decks and road fill...

Date published: September 12, 2019
Status: Completed

Structure From Motion

Coastal topographic and bathymetric (topobathymetric) data with high spatial resolution (1-meter or better) and high vertical accuracy are needed to assess the vulnerability of Pacific Islands to climate change impacts, including sea-level rise. According to the Intergovernmental Panel on Climate Change reports, low-lying atolls in the Pacific Ocean are extremely vulnerable to king tide events...

Date published: September 12, 2019
Status: Completed

Storm Surge Hazards

The USGS Coastal National Elevation Database Applications Project organized a workshop in cooperation with the College of Staten Island-City University of New York to discuss storm surge modeling and get input from scientists across a broad community. The workshop, held on April 22-23, 2014 on the College of Staten Island campus, is part of a larger project intended to enhance topobathymetric...

Date published: September 12, 2019
Status: Completed

Sea-level rise

The accuracy with which coastal topography has been mapped directly affects the reliability and usefulness of elevation-based sea-level rise vulnerability assessments. Recent research has shown that the qualities of the elevation data must be well understood to properly model potential impacts. The cumulative vertical uncertainty has contributions from elevation data error, water level data...

Date published: September 11, 2019
Status: Completed

Restoration, Redevelopment, and Protection Projects

The Coastal National Elevation Database Applications Project supports scientific research and applications assessing restoration, redevelopment, and protection projects in the Hurricane Sandy impact areas along New Jersey and New York coastal beaches.