Coastal Landscape Change and Vulnerability
Scientific research and applications assessing coastal landscape change and vulnerability are critical for applications such as shoreline mapping, hydrodynamic modeling, coastal vulnerability, and coastal geomorphology studies. However, very little ground truth data are available within the intertidal zone and adjacent beaches.
During a field trip in late April, 2014, U.S. Geological Survey (USGS) and National Oceanic and Atmospheric Administration National Geophysical Data Center scientists collected precision elevation data at several locations in New York, including Heckscher State Park and Montauk Point State Park on Long Island; Dubos Point Wildlife Sanctuary in Queens, New York; Battery Park in Manhattan, New York; and along the southeastern coast of Staten Island, New York. At all locations, transects perpendicular to the shoreline were mapped using survey-grade GPS equipment to obtain beach elevation profiles. The field surveys were timed to occur near low tide, and the transects were extended into the water to a depth of up to 1 meter. The transect spacing varied based on the length of the publicly accessible shoreline, but the typical spacing was 50-100 meters. GPS elevation data were also collected in some forested areas and in densely vegetated wetlands, particularly in Phragmites australis stands in order to quantify the accuracy of the bare earth elevation obtained from airborne lidar in various land cover types.
The goal of the field work was to collect field measurements using both precision GPS and a mobile terrestrial lidar scanner that is nearly concurrent with airborne lidar surveys that have been flown recently (winter/early spring 2014) over New York City. GPS and terrestrial lidar were collected along beaches, in adjacent coastal wetlands, in the intertidal zone, and along other topographic features such as seawalls or artificial dunes that can impede or direct the flow of water through the landscape. The data will be incorporated into an integrated topobathymetric elevation surface of the New York City area. A portion of the data will be set aside as an independent dataset to quantify the vertical error in the final integrated TBDEM and to evaluate the ability of airborne lidar to resolve small but important topographic features.
Additional information regarding Hurricane Sandy is available online at https://www.usgs.gov/special-topic/hurricane-sandy.
Below are other science projects associated with this project.
Coastal National Elevation Database (CoNED) Applications Project
Coastal National Elevation Database (CoNED) Applications Project
Scientific research and applications assessing coastal landscape change and vulnerability are critical for applications such as shoreline mapping, hydrodynamic modeling, coastal vulnerability, and coastal geomorphology studies. However, very little ground truth data are available within the intertidal zone and adjacent beaches.
During a field trip in late April, 2014, U.S. Geological Survey (USGS) and National Oceanic and Atmospheric Administration National Geophysical Data Center scientists collected precision elevation data at several locations in New York, including Heckscher State Park and Montauk Point State Park on Long Island; Dubos Point Wildlife Sanctuary in Queens, New York; Battery Park in Manhattan, New York; and along the southeastern coast of Staten Island, New York. At all locations, transects perpendicular to the shoreline were mapped using survey-grade GPS equipment to obtain beach elevation profiles. The field surveys were timed to occur near low tide, and the transects were extended into the water to a depth of up to 1 meter. The transect spacing varied based on the length of the publicly accessible shoreline, but the typical spacing was 50-100 meters. GPS elevation data were also collected in some forested areas and in densely vegetated wetlands, particularly in Phragmites australis stands in order to quantify the accuracy of the bare earth elevation obtained from airborne lidar in various land cover types.
The goal of the field work was to collect field measurements using both precision GPS and a mobile terrestrial lidar scanner that is nearly concurrent with airborne lidar surveys that have been flown recently (winter/early spring 2014) over New York City. GPS and terrestrial lidar were collected along beaches, in adjacent coastal wetlands, in the intertidal zone, and along other topographic features such as seawalls or artificial dunes that can impede or direct the flow of water through the landscape. The data will be incorporated into an integrated topobathymetric elevation surface of the New York City area. A portion of the data will be set aside as an independent dataset to quantify the vertical error in the final integrated TBDEM and to evaluate the ability of airborne lidar to resolve small but important topographic features.
Additional information regarding Hurricane Sandy is available online at https://www.usgs.gov/special-topic/hurricane-sandy.
Below are other science projects associated with this project.