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Nancy DeWitt

Nancy DeWitt is a Geologist at the St. Petersburg Coastal and Marine Science Center in St. Petersburg, Florida.

Science and Products

Filter Total Items: 22

High-resolution Geophysical Data Collected in June 2022 Near Tyndall Air Force Base, Panama City, Florida

Scientists from the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center in St. Petersburg, Florida (USGS - SPCSMC), conducted a geophysical survey within the interior bay north of the Tyndall Air Force Base, Panama City, Florida, during June 2022. During this study, multibeam bathymetry and acoustic backscatter data were collected aboard the research vessel (R/V) Sallenger usin
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St. Petersburg Coastal and Marine Science Center

Archive of Chirp Subbottom Profile Data Collected in 2022 From Seven Mile Island, New Jersey

As part of the Coastal Sediment Availability and Flux project, scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center (SPCMSC) conducted a nearshore geophysical survey to map the shoreface and inner shelf, as well as characterizing stratigraphy near Seven Mile Island, New Jersey (NJ) in April and May 2022. The objective of the project is to improve the u
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St. Petersburg Coastal and Marine Science Center

Coastal Single-beam Bathymetry Data Collected in 2022 off Seven Mile Island, New Jersey

The U.S. Geological Survey St. Petersburg Coastal and Marine Science Center (USGS SPCMSC) collected single beam echosounder (SBES) data in the nearshore environment off Seven Mile Island, New Jersey in May 2022. This USGS data release includes the processed elevation point data (xyz) for Field Activity Number (FAN) 2022-309-FA, SubFAN 22BIM03 on board the research vessel (RV) Sallenger and SubFAN
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St. Petersburg Coastal and Marine Science Center

Sediment Data From Vibracores and Sand Augers Collected in 2021 and 2022 From Fire Island, New York

In 2021 and 2022, scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center (SPCMSC) and the USGS New York Water Science Center (NYWSC), on behalf of SPCMSC, conducted sediment sampling and ground penetrating radar (GPR) surveys at Point O' Woods and Ho-Hum Beach (NYWSC, 2021) and Watch Hill, Long Cove, and Smith Point (SPCMSC, 2022), Fire Island, New York.
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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Radiochemical Data From Sediment Cores Collected on Deer Island, Mississippi

In December 2021, four sediment push cores (core names appended with 'M' for marsh push core) and peat augers (core names appended with 'R' for Russian peat auger) were collected from the marshes of Deer Island, Mississippi during U.S. Geological Survey (USGS) field activity number (FAN) 2021-351-FA. Select intervals from the manual push cores were analyzed for determination of lead-210 activities
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St. Petersburg Coastal and Marine Science Center

Archive of Chirp Subbottom Profile and Single-Beam Bathymetry Data Collected in 2021 From Santa Rosa Island, Florida

As part of the Coastal Resource Evaluation for Management Applications (CREMA) Project, scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center (SPCMSC) conducted a nearshore geophysical survey to map the shoreface and determine Holocene stratigraphy near Pensacola Beach, Florida (FL) in June of 2021. The objective of the project is to investigate nearsho
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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Archive of Chirp Subbottom Profile Data Collected in 2019 From Rockaway Peninsula, New York

As part of the Coastal Sediment Availability and Flux Project, scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center conducted a nearshore geophysical survey to map the shoreface of Rockaway, New York (NY) between September and October of 2019. The objective of the project is to improve the understanding of barrier island geomorphic evolution and the se
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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Coastal Bathymetry and Backscatter Data Collected in September-October 2019 from Rockaway Peninsula, New York

Scientists from the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center in St. Petersburg, Florida (USGS - SPCSMC), conducted a geophysical survey nearshore the Rockaway Peninsula, New York, during September and October 2019. During this study, multibeam bathymetry and acoustic backscatter data were collected aboard the R/V Sallenger (two separate survey efforts: Leg 1-October
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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Multibeam Bathymetry Data Collected in 2018 offshore of Cedar Key, Florida

The U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center (SPCMSC) conducted a multibeam bathymetry survey of a selected area offshore Cedar Key, Florida (FL) for the Florida Big Bend Pilot Study funded by USGS and the National Oceanic Atmospheric Administration (NOAA). The study involves federal, state, and local agencies who are taking a comprehensive approach to investi
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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Coastal Bathymetry Data Collected in August 2018 from the Chandeleur Islands, Louisiana

Scientists from the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center in St. Petersburg, Florida (USGS-SPCSMC), conducted a bathymetric survey of the Northern Chandeleur Islands, in August 2018. During this study, multibeam bathymetry data were collected aboard the research vessel (R/V) Sallenger, while single-beam bathymetry data were collected aboard the R/V Jabba Jaw. Effo
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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Archive of Chirp Subbottom Profile Data Collected in 2018 From the Northern Chandeleur Islands, Louisiana

As part of the Barrier Island Evolution Research Project, scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center conducted a nearshore geophysical survey around the northern Chandeleur Islands, Louisiana, in August of 2017. The objective of the project is to improve the understanding of barrier island geomorphic evolution, particularly storm-related depo
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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center, Gulf of Mexico

Single-Beam Bathymetric Data Collected in 2004 and 2008 from the Mississippi River Delta Plain, Louisiana

This data release serves as an archive of single-beam bathymetric (SBB) data collected in July 2004 (Madison Bay study area; U.S. Geological Survey [USGS] Field Activity Number [FAN] 2004-303-FA) and August 2008 (Bully Camp, Point au Chien, Caminada, Fourchon, and Leeville study areas; USGS FAN 08SWL02) at six study areas in the Mississippi River Delta Plain (MRDP), Louisiana. Data were collected
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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center
Filter Total Items: 30

Nearshore single-beam bathymetry data collected in 2015, Dauphin Island, Alabama

Dauphin Island, Alabama, is a barrier island located in the northern Gulf of Mexico that supports local residences, tourism, commercial infrastructure, and historic Fort Gaines. During the past decade, Dauphin Island was affected by several major hurricanes—Hurricanes Ivan (2004), Katrina (2005), and Isaac (2012)—and storms, along with sea-level rise, continue to present a threat to island stabili
Authors
Nancy T. DeWitt, Chelsea A. Stalk, James G. Flocks, Julie Bernier, Kyle W. Kelso, Jake J. Fredericks, Thomas M. Tuten
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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Nearshore coastal bathymetry data collected in 2016 from West Ship Island to Horn Island, Gulf Islands National Seashore, Mississippi

The U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center, in cooperation with the U.S. Army Corps of Engineers, Mobile District, conducted bathymetric surveys of the nearshore waters surrounding Ship and Horn Islands, Gulf Islands National Seashore, Mississippi. The objective of this study was to establish base-level elevation conditions around West Ship, East Ship, and H
Authors
Nancy T. DeWitt, Chelsea A. Stalk, Jake J. Fredericks, James G. Flocks, Kyle W. Kelso, Andrew S. Farmer, Thomas M. Tuten, Noreen A. Buster
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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Chirp subbottom profile data collected in 2015 from the northern Chandeleur Islands, Louisiana

As part of the Barrier Island Evolution Research project, scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center conducted a nearshore geophysical survey around the northern Chandeleur Islands, Louisiana, in September 2015. The objective of the project is to improve the understanding of barrier island geomorphic evolution, particularly storm-related depo
Authors
Arnell S. Forde, Nancy T. DeWitt, Jake J. Fredericks, Jennifer L. Miselis
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Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Single-beam bathymetry data collected in 2015 from Grand Bay, Alabama-Mississippi

As part of the Sea-level and Storm Impacts on Estuarine Environments and Shorelines (SSIEES) project, scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center conducted a single-beam bathymetry survey within the estuarine, open-bay, and tidal creek environments of Grand Bay, Alabama-Mississippi, from May to June 2015. The goal of the SSIEES project is to a
Authors
Nancy T. DeWitt, Chelsea A. Stalk, Christopher G. Smith, Stanley D. Locker, Jake J. Fredericks, Terrence A. McCloskey, Cathryn J. Wheaton
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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Analysis of seafloor change around Dauphin Island, Alabama, 1987–2015

Dauphin Island is a 26-km-long barrier island located southwest of Mobile Bay, Alabama, in the north-central Gulf of Mexico. The island contains sandy beaches, dunes, maritime forests, freshwater ponds and intertidal wetlands, providing habitat for many endangered and threatened species. Dauphin Island also provides protection for and maintains estuarine conditions within Mississippi Sound, suppor
Authors
James G. Flocks, Nancy T. DeWitt, Chelsea A. Stalk
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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center, Gulf of Mexico

Archive of bathymetry data collected in South Florida from 1995 to 2015

DescriptionLand development and alterations of the ecosystem in south Florida over the past 100 years have decreased freshwater and increased nutrient flows into many of Florida's estuaries, bays, and coastal regions. As a result, there has been a decrease in the water quality in many of these critical habitats, often prompting seagrass die-offs and reduced fish and aquatic life populations. Resto
Authors
Mark Erik Hansen, Nancy T. DeWitt, Billy J. Reynolds
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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Post-Hurricane Katrina coastal oblique aerial photographs collected from Panama City, Florida, to Lakeshore, Mississippi, and the Chandeleur Islands, Louisiana, August 31, 2005

The U.S. Geological Survey (USGS), as part of the National Assessment of Storm-Induced Coastal Change Hazards project, conducts baseline and storm-response photography missions to document and understand the changes in vulnerability of the Nation's coasts to extreme storms. On August 31, 2005, the USGS conducted an oblique aerial photographic survey from Panama City, Florida, to Lakeshore, Mississ
Authors
Karen L. M. Morgan, Nancy T. DeWitt
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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center, Hurricanes

Coastal single-beam bathymetry data collected in 2015 from Raccoon Point to Point Au Fer Island, Louisiana

As part of the Barrier Island Comprehensive Monitoring Program (BICM), scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center conducted a nearshore single-beam bathymetry survey along the south-central coast of Louisiana, from Raccoon Point to Point Au Fer Island, in July 2015. The goal of the BICM program is to provide long-term data on Louisiana’s coas
Authors
Chelsea A. Stalk, Nancy T. DeWitt, Jack L. Kindinger, James G. Flocks, Billy J. Reynolds, Kyle W. Kelso, Joseph J. Fredericks, Thomas M. Tuten
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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Coastal single-beam bathymetry data collected in 2015 from the Chandeleur Islands, Louisiana

As part of the Louisiana Coastal Protection and Restoration Authority (CPRA) Barrier Island Comprehensive Monitoring Program, scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center conducted a single-beam bathymetry survey around the Chandeleur Islands, Louisiana, in June 2015. The goal of the program is to provide long-term data on Louisiana’s barrier i
Authors
Chelsea A. Stalk, Nancy T. DeWitt, Julie Bernier, Jack G. Kindinger, James G. Flocks, Jennifer L. Miselis, Stanley D. Locker, Kyle W. Kelso, Thomas M. Tuten
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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Coastal bathymetry data collected in 2013 from the Chandeleur Islands, Louisiana

As part of the Barrier Island Evolution Research Project, scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center conducted nearshore geophysical surveys around the northern Chandeleur Islands, Louisiana, in July and August of 2013. The objective of the study is to better understand barrier-island geomorphic evolution, particularly storm-related depositio
Authors
Nancy T. DeWitt, Jennifer L. Miselis, Jake J. Fredericks, Julie Bernier, Billy J. Reynolds, Kyle W. Kelso, David M. Thompson, James G. Flocks, Dana S. Wiese
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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Archive of bathymetry and backscatter data collected in 2014 nearshore Breton and Gosier Islands, Breton National Wildlife Refuge, Louisiana

As part of the Barrier Island Monitoring Project, scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center conducted nearshore geophysical surveys off Breton and Gosier Islands, Louisiana, in July and August of 2014. To assist the United States Fish and Wildlife Service (USFWS) with restoration planning efforts, the USGS was tasked with answering fundament
Authors
Nancy T. DeWitt, Jake J. Fredericks, James G. Flocks, Jennifer L. Miselis, Stanley D. Locker, Jack L. Kindinger, Julie Bernier, Kyle W. Kelso, Billy J. Reynolds, Dana S. Wiese, Trevor Browning
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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Archive of Sidescan Sonar and Swath Bathymetry Data Collected During USGS Cruise 13CCT04 Offshore of Petit Bois Island, Gulf Islands National Seashore, Mississippi, August 2013

In August of 2013, the U.S. Geological Survey conducted a geophysical survey offshore of Petit Bois Island, Mississippi. This effort was part of the U.S. Geological Survey Gulf of Mexico Science Coordination partnership with the U.S. Army Corps of Engineers to assist the Mississippi Coastal Improvements Program and the Northern Gulf of Mexico Ecosystem Change and Hazards Susceptibility Project, by
Authors
Nancy T. DeWitt, James G. Flocks, Jack L. Kindinger, Julie Bernier, Kyle W. Kelso, Dana S. Wiese, David P. Finlayson, William R. Pfeiffer
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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center, Gulf of Mexico

Science and Products