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Long-term and short-term shoreline change rates for coastal region around Boston, Massachusetts calculated without the proxy-datum bias using the Digital Shoreline Analysis System version 5.0

Dates

Publication Date

Citation

Himmelstoss, E.A., Farris, A.S., Weber, K.M., and Henderson, R.E., 2019, Massachusetts shoreline change project, 2018 update–A GIS compilation of shoreline change rates calculated using Digital Shoreline Analysis System version 5.0, with supplementary intersects and baselines for Massachusetts (ver. 2.0, August 2019): U.S. Geological Survey data release, https://doi.org/10.5066/P9RRBEYK.

Summary

The Massachusetts Office of Coastal Zone Management launched the Shoreline Change Project in 1989 to identify erosion-prone areas of the coast. The shoreline position and change rate are used to inform management decisions regarding the erosion of coastal resources. In 2001, a shoreline from 1994 was added to calculate both long- and short-term shoreline change rates along ocean-facing sections of the Massachusetts coast. In 2013, two oceanfront shorelines for Massachusetts were added using 2008-9 color aerial orthoimagery and 2007 topographic lidar datasets obtained from the National Oceanic and Atmospheric Administration's Ocean Service, Coastal Services Center. This 2018 data release includes rates that incorporate two new mean [...]

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Boston_rates_browse.png thumbnail 260.74 KB
Boston_rates_meta.html 93.92 KB
Boston_rates_meta.txt 44.26 KB
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45.45 KB
Shapefile: Boston_NB_LT_rates.zip
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Boston_NB_LT_rates.sbn 12.7 KB
Boston_NB_LT_rates.sbx 828 Bytes
Boston_NB_LT_rates.shp 130.1 KB
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Shapefile: Boston_NB_ST_rates.zip
Boston_NB_ST_rates.CPG 5 Bytes
Boston_NB_ST_rates.dbf 221.78 KB
Boston_NB_ST_rates.prj 145 Bytes
Boston_NB_ST_rates.sbn 12.3 KB
Boston_NB_ST_rates.sbx 804 Bytes
Boston_NB_ST_rates.shp 125.22 KB
Boston_NB_ST_rates.shx 9.72 KB

Purpose

This dataset describes the long-term (~150 years) and short-term (~30 years) shoreline change rates for the Boston coastal region. Rate calculations were computed within a GIS using the Digital Shoreline Analysis System (DSAS) version 5.0, an ArcGIS extension developed by the U.S. Geological Survey. Long-term and short-term rates of shoreline change were calculated using a linear regression rate based on available shoreline data. A reference baseline was used as the originating point for the orthogonal transects cast by the DSAS software. The transects intersect each shoreline establishing measurement points, which are then used to calculate rates. This dataset consists of shoreline change rates calculated with DSAS v5.0 and stored as a new transect layer. Original measurement transects are cast by DSAS from the baseline to intersect shoreline vectors, and the intersect data provide location and time information used to calculate rates of change.

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