Images

Installing large boulders as rip rap to armor the shore against further erosion at Goleta Beach in Southern California. The tide is very low (negative).

Exposed bedrock on the beach during very low (negative) tide at Isla Vista, California

Beach loss and armoring at Goleta Beach, very low (negative) tide

Bedrock exposed at low tide along the beach at Isla Vista, California

USGS oceanographer Dan Hoover uses a GPS-equipped backpack to measure sand elevations near the mouth of the San Lorenzo River in Santa Cruz, California, January 12, 2017. Surveys like this make long-term studies of coastal change possible.

A sonar-equipped personal watercraft mapping the bathymetry underwater near Santa Cruz, Calif.

USGS scientists readying a sonar-equipped boat to map the ocean bottom near Santa Cruz, Calif.

USGS scientist Daniel Hoover mapping the beach at Santa Cruz with a GPS-equipped backpack unit.

 USGS scientists setting up a lidar scanner on the pier to map the beach near Capitola, California.

Mount Crillon in the backdrop during a multibeam bathymetry survey of the Queen Charlotte-Fairweather Fault, offshore southeastern Alaska.

Participants at the September 2016 Argus Workshop at the U.S. Army Corps of Engineers Field Research Facility in Duck, North Carolina, including many of the scientists named in this article (labeled). Rob Holman (Oregon State University) took the photo with a drone.

USGS research geologist Jon Warrick explains how his team applied structure-from-motion analysis to photos from the California Coastal Records Project to measure coastal change. Jon Warrick explains a “difference map” constructed from structure-in-motion data. Red areas indicate loss of material (erosion); blue areas show addition of material (deposition).

Photograph from pole-mounted camera, looking west across the Skagit River delta and one of several large sediment fans that are moving 1-2 meters per day across the tidal flats. These fans threaten to bury the last intact stands of eelgrass in Skagit Bay, an important rearing habitat for juvenile salmon, crab, and other marine wildlife.

Three-dimensional view of the Hosgri fault 45 meters below the seafloor, revealing fault strands (black), and potential paths along the fault that fluid could follow (green/blue). The other colors represent different geologic layers.

The USGS strives to put coastal change data and information at the fingertips of users such as planners and emergency managers. The explicit goal is to enable users to integrate and apply USGS data and tools to address their specific needs. Online resources such as the Coastal Change Hazards (CCH) portal are designed with applied use of data in mind.

Photographs taken during Tropical Storm Colin (left, June 6, 2016) and one day later (right) on Sunset Beach in the town of St. Pete Beach, Florida. Storm waves eroded the beach and dune, producing a cliff-like feature called a beach scarp. Continuous video collected during a storm could provide more information about the processes causing this coastal change.

A USGS researcher gathers elevation data from an eroding coastal bluff in Arctic Alaska

Sandy beach and cliffs at Moss Landing, California

Large storm waves crashing on the rocks near Santa Cruz, California

Map view. Colored shaded-relief bathymetry map of Monterey Canyon and Vicinity map area, generated from multibeam-echosounder and bathymetric-sidescan data. Colors show depth: reds and oranges indicate shallower areas; purples, deeper areas. Illumination azimuth is 300°, from 45° above horizon.

Photographs showing equipment used during bathymetric and topographic surveys along the Columbia River littoral cell, Washington and Oregon.