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DSAS v6.0 infographic
DSAS v6.0 Infographic
DSAS v6.0 Infographic
DSAS v6.0 Infographic

The Digital Shoreline Analysis System (DSAS) version 6 is a standalone application that calculates shoreline or boundary change over time. The GIS of a user’s choice is used to prepare the data for DSAS.  Like previous versions, DSAS v.6 enables a user to calculate rate-of-change statistics from multiple historical shoreline positions.

The Digital Shoreline Analysis System (DSAS) version 6 is a standalone application that calculates shoreline or boundary change over time. The GIS of a user’s choice is used to prepare the data for DSAS.  Like previous versions, DSAS v.6 enables a user to calculate rate-of-change statistics from multiple historical shoreline positions.

infographic showing transects signaling coastal change, onshore and offshore baselines
DSAS
DSAS
DSAS

DSAS generates transects that are cast perpendicular to the reference baseline to intersect shorelines at a user-specified spacing alongshore. Please note that the figure above illustrates the placement of both onshore and offshore baselines as examples. In DSAS v6.0 all baselines in a file must be placed either offshore or onshore, not combined.

DSAS generates transects that are cast perpendicular to the reference baseline to intersect shorelines at a user-specified spacing alongshore. Please note that the figure above illustrates the placement of both onshore and offshore baselines as examples. In DSAS v6.0 all baselines in a file must be placed either offshore or onshore, not combined.

A woman stands in front of a table covered with information products, with 2 large vertical posters behind her.
Donya Frank-Gilchrist (SPCMSC) manages the USGS booth at the 2024 SCDRP annual meeting
Donya Frank-Gilchrist (SPCMSC) manages the USGS booth at the 2024 SCDRP annual meeting
Donya Frank-Gilchrist (SPCMSC) manages the USGS booth at the 2024 SCDRP annual meeting

Donya Frank-Gilchrist (SPCMSC) manages the USGS booth at the recent SCDRP annual meeting to share USGS data and tools with community resilience partners and stakeholders.

group of people smiling for group photo in building with USGS on the wall
COAWST Training
COAWST Training
COAWST Training

On January 17-18, 2024, John Warner provided a two-day training for the COAWST (Coupled Ocean-Atmosphere-Waves-Sediment Transport) modeling system.

On January 17-18, 2024, John Warner provided a two-day training for the COAWST (Coupled Ocean-Atmosphere-Waves-Sediment Transport) modeling system.

Bleaching Elkhorn coral in Buck Island Reef National Monument
Bleaching Elkhorn coral in Buck Island Reef National Monument
Bleaching Elkhorn coral in Buck Island Reef National Monument
Bleaching Elkhorn coral in Buck Island Reef National Monument

Shown here is a photograph taken on October 20, 2023, of a wild Elkhorn coral colony in Buck Island Reef National Monument, St. Croix, VI, showing the effects of heat stress caused by elevated ocean temperatures. The heat stress causes “coral bleaching,” or the loss of nutrient-giving microscopic algae that normally live within corals.

Shown here is a photograph taken on October 20, 2023, of a wild Elkhorn coral colony in Buck Island Reef National Monument, St. Croix, VI, showing the effects of heat stress caused by elevated ocean temperatures. The heat stress causes “coral bleaching,” or the loss of nutrient-giving microscopic algae that normally live within corals.

A screen shot of computer tool shows selected areas (left) and total water level forecast for Madeira Beach Florida (right)
View of forecast for Madeira Beach, FL on the USGS Total Water Level and Coastal Change Forecast Viewer on August 30, 2023, during Hurricane Idalia
View of forecast for Madeira Beach, FL on the USGS Total Water Level and Coastal Change Forecast Viewer on August 30, 2023, during Hurricane Idalia
View of forecast for Madeira Beach, FL on the USGS Total Water Level and Coastal Change Forecast Viewer on August 30, 2023, during Hurricane Idalia

Prior to landfall on the Gulf coast of the Florida peninsula on August 30, 2023, the Coastal Change Hazards Team forecast that 95 percent of beaches were forecast to erode at the dunes’ base, 20 percent of dunes were forecast to be overwashed by storm waves, and 1 percent of dunes were expected to be inundated (completely submerged) by surge, tide, and waves. T

Prior to landfall on the Gulf coast of the Florida peninsula on August 30, 2023, the Coastal Change Hazards Team forecast that 95 percent of beaches were forecast to erode at the dunes’ base, 20 percent of dunes were forecast to be overwashed by storm waves, and 1 percent of dunes were expected to be inundated (completely submerged) by surge, tide, and waves. T

Bleached Elkhorn coral now under shade in Biscayne National Park
Bleached Elkhorn coral now under shade in Biscayne National Park
Bleached Elkhorn coral now under shade in Biscayne National Park
Bleached Elkhorn coral now under shade in Biscayne National Park

Shown here is a small colony of the threatened Elkhorn coral, Acropora palmata, that has become "bleached," that is, lost all its algal symbionts (also called zooxanthellae) because of the summer 2023 ocean-heat wave. The coral is attached to a cement block as part of the U.S.

Shown here is a small colony of the threatened Elkhorn coral, Acropora palmata, that has become "bleached," that is, lost all its algal symbionts (also called zooxanthellae) because of the summer 2023 ocean-heat wave. The coral is attached to a cement block as part of the U.S.

Elkhorn coral suffering from bleaching in Dry Tortugas National Park, Pulaski Shoal
Elkhorn coral suffering from bleaching in Dry Tortugas National Park, Pulaski Shoal
Elkhorn coral suffering from bleaching in Dry Tortugas National Park, Pulaski Shoal
Elkhorn coral suffering from bleaching in Dry Tortugas National Park, Pulaski Shoal

Shown here is a colony of the threatened Elkhorn coral, Acropora palmata, that has succumbed to "bleaching," that is, lost all its algal symbionts (also called zooxanthellae) because of the summer 2023 ocean-heat wave. The coral is attached to a cement block as part of the U.S.

Shown here is a colony of the threatened Elkhorn coral, Acropora palmata, that has succumbed to "bleaching," that is, lost all its algal symbionts (also called zooxanthellae) because of the summer 2023 ocean-heat wave. The coral is attached to a cement block as part of the U.S.

Divers putting shades over experimental Elkhorn corals in Biscayne National Park
Divers putting shades over experimental Elkhorn corals in Biscayne National Park
Divers putting shades over experimental Elkhorn corals in Biscayne National Park
Divers putting shades over experimental Elkhorn corals in Biscayne National Park

Shown here are three SCUBA divers installing shade structures over experimental Elkhorn corals (Acropora palmata) that have become "bleached," that is, lost all their algal symbionts (also called zooxanthellae) because of the summer 2023 ocean-heat wave. The corals are attached to cement blocks as part of the U.S.

Shown here are three SCUBA divers installing shade structures over experimental Elkhorn corals (Acropora palmata) that have become "bleached," that is, lost all their algal symbionts (also called zooxanthellae) because of the summer 2023 ocean-heat wave. The corals are attached to cement blocks as part of the U.S.

A bleached white Elkhorn coral in Dry Tortugas National Park has died
Bleached Elkhorn coral in Dry Tortugas National Park
Bleached Elkhorn coral in Dry Tortugas National Park
Bleached Elkhorn coral in Dry Tortugas National Park

Shown here is a colony of the threatened Elkhorn coral, Acropora palmata, in Dry Tortugas National Park that has become "bleached," that is, lost all its algal symbionts (also called zooxanthellae) because of the summer 2023 ocean-heat wave.

Shown here is a colony of the threatened Elkhorn coral, Acropora palmata, in Dry Tortugas National Park that has become "bleached," that is, lost all its algal symbionts (also called zooxanthellae) because of the summer 2023 ocean-heat wave.

Bleached white Elkhorn coral shown under a shade cover installed to protect it in Dry Tortugas National Park, Pulaski Shoal
Bleached Elkhorn coral under a shade in Dry Tortugas National Park, Pulaski Shoal
Bleached Elkhorn coral under a shade in Dry Tortugas National Park, Pulaski Shoal
Bleached Elkhorn coral under a shade in Dry Tortugas National Park, Pulaski Shoal

Shown here is a colony of the threatened Elkhorn coral, Acropora palmata, that has become "bleached," that is, lost all its algal symbionts (also called zooxanthellae) because of the summer 2023 ocean-heat wave. The coral is attached to a cement block as part of the U.S.

Shown here is a colony of the threatened Elkhorn coral, Acropora palmata, that has become "bleached," that is, lost all its algal symbionts (also called zooxanthellae) because of the summer 2023 ocean-heat wave. The coral is attached to a cement block as part of the U.S.

Bleached white Elkhorn coral under a shade in Dry Tortugas National Park, Garden Key
Bleached Elkhorn coral under a shade in Dry Tortugas National Park, Garden Key
Bleached Elkhorn coral under a shade in Dry Tortugas National Park, Garden Key
Bleached Elkhorn coral under a shade in Dry Tortugas National Park, Garden Key

Shown here is a colony of the threatened Elkhorn coral, Acropora palmata, that has become "bleached," that is, lost all its algal symbionts (also called zooxanthellae) because of the summer 2023 ocean-heat wave. The coral is attached to a cement block as part of the U.S.

Shown here is a colony of the threatened Elkhorn coral, Acropora palmata, that has become "bleached," that is, lost all its algal symbionts (also called zooxanthellae) because of the summer 2023 ocean-heat wave. The coral is attached to a cement block as part of the U.S.

Lake superior beach with sand, dune, driftwood, grass and trees
Lakeshore Park Beach in Ontonagon, Michigan
Lakeshore Park Beach in Ontonagon, Michigan
Lakeshore Park Beach in Ontonagon, Michigan

Coastal communities on the Great Lakes may experience coastal change, including dune erosion. The USGS and NOAA are developing the Total Water and Coastal Change Forecast at sites like this one in Ontanogan, Michigan to provide communities with real-time information for decision making.

Coastal communities on the Great Lakes may experience coastal change, including dune erosion. The USGS and NOAA are developing the Total Water and Coastal Change Forecast at sites like this one in Ontanogan, Michigan to provide communities with real-time information for decision making.

Scientist in fieldwork gear standing with 2 sediment traps on a research vessel
Scientist with sediment traps
Scientist with sediment traps
Scientist with sediment traps

Photograph of Caitlin Reynolds and the sediment traps from the Gulf of Mexico aboard the R/V Weatherbird. Scientists collect and redeploy the mooring every 6-9 months. 

Photograph of Caitlin Reynolds and the sediment traps from the Gulf of Mexico aboard the R/V Weatherbird. Scientists collect and redeploy the mooring every 6-9 months. 

a scientist points to a cylindrical object in front of two young women in a laboratory
Dr. Legna Torres-García shows oceanographic equipment to campers from Oceanography Camp for Girls
Dr. Legna Torres-García shows oceanographic equipment to campers from Oceanography Camp for Girls
Dr. Legna Torres-García shows oceanographic equipment to campers from Oceanography Camp for Girls

Dr. Legna Torres-García participated in camper interviews for the 2023 Oceanography Camp for Girls, during which she explained the types of oceanographic equipment that is used to collect data to help create and improve coastal change hazard predictions. 

Dr. Legna Torres-García participated in camper interviews for the 2023 Oceanography Camp for Girls, during which she explained the types of oceanographic equipment that is used to collect data to help create and improve coastal change hazard predictions. 

Students gather around an outdoor picnic table holding a scientific display. A woman speaks and holds a poster.
Kara Doran describes USGS coastal change hazards forecasts to students
Kara Doran describes USGS coastal change hazards forecasts to students
Kara Doran describes USGS coastal change hazards forecasts to students

Kara Doran shares USGS coastal change hazards forecasts and observations with campers from University of South Florida's 2023 Oceanography Camp for Girls.

A person in a USGS shirt stands by a monitor displaying maps of Puerto Rico with red and white lines indicating probabilities
Priscila Vargas-Babilonia attended the 2023 CariCOOS General Assembly
Priscila Vargas-Babilonia attended the 2023 CariCOOS General Assembly
Priscila Vargas-Babilonia attended the 2023 CariCOOS General Assembly

The Caribbean Coastal Ocean Observing System (CARICOOS) hosted a General Assembly May 26, 2023, in San Juan, Puerto Rico, and featured a presentation about USGS coastal hazards research, shoreline change geonarrative, natural hazards web pages, and other research related to the island.

The Caribbean Coastal Ocean Observing System (CARICOOS) hosted a General Assembly May 26, 2023, in San Juan, Puerto Rico, and featured a presentation about USGS coastal hazards research, shoreline change geonarrative, natural hazards web pages, and other research related to the island.

A research vessel with equipment and 3 people on deck sits dockside on a clear, sunny day.
The R/V Weatherbird II in port
The R/V Weatherbird II in port
The R/V Weatherbird II in port

The R/V Weatherbird II docked at the Florida Institute of Oceanography at University of South Florida (USF) College of Marine Science in St. Petersburg, Florida. USGS scientists and partners at Eckerd College and USF load the vessel in preparation for a research cruise as part of a National Science Foundation (NSF)-funded Scientist-at-Sea program.

The R/V Weatherbird II docked at the Florida Institute of Oceanography at University of South Florida (USF) College of Marine Science in St. Petersburg, Florida. USGS scientists and partners at Eckerd College and USF load the vessel in preparation for a research cruise as part of a National Science Foundation (NSF)-funded Scientist-at-Sea program.