Sea Floor Stress and Sediment Mobility Database

Database Update History

Database Update History

Database updates from November 2012- July 2020

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Critical Stress Calculation

Critical Stress Calculation

Surficial sediment texture data are used to estimate the critical shear stress at those points where sediment texture data are available. Additional information may be found in Dalyander and others. (2012).

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Links to Data

The U.S. Geological Survey Sea Floor Stress and Sediment Mobility Database contains estimates of wave-current bottom stress and sediment mobility for the U.S. Atlantic and Gulf Coast continental shelf regions. 

Gulf of Maine

Middle Atlantic Bight

South Atlantic Bight

Gulf of Mexico

Science Center Objects

The U.S. Geological Survey Sea Floor Stress and Sediment Mobility Database contains estimates of wave-current bottom stress and sediment mobility for the U.S. Atlantic and Gulf Coast continental shelf regions.

This USGS database provides information to address issues in coastal and offshore areas where the degree and/or frequency of sediment mobility are important, such as characterization of sea floor ecosystems and evaluation of areas prior to development.

The estimates contained in the database are designed to spatially and seasonally resolve the general characteristics of wave-current bottom shear stress over the US continental shelf, and to estimate sea floor mobility by comparing the modeled stress to critical shear stress thresholds for initiation of sediment movement at sites where grain size data are available. All stress values are given in Pascals (Pa). The methodology for creating the estimates of bottom stress and sediment mobility contained in this data base may be found in Dalyander and others (2012).

The database is organized by region. Select the region of interest to download files showing previews of results, metadata, and sea floor stress and mobility statistics in Arc polygon and point shapefile format. 

Please use the following citation when referencing these datasets:

Dalyander, P.S., Butman, B., Sherwood, C.R., and Signell, R.P., 2012, U.S. Geological Survey sea floor stress and sediment mobility database: U.S. Geological Survey data release, https://doi.org/10.5066/P999PY84