Massachusetts High Water Shorelines (1800s-2009)
- Due to continued coastal population growth and increased threats of erosion, current data on trends and rates of shoreline movement are required to inform shoreline and floodplain management. The Massachusetts Office of Coastal Zone Management (MACZM) launched the Shoreline Change Project in 1989 to identify erosion-prone areas of the coast. In 2001, a 1994 shoreline was added to calculate both long- and short-term shoreline change rates at 40-meter intervals along ocean-facing sections of the Massachusetts coast. Currently, shorelines and transects with rates are available in MORIS, the Massachusetts Ocean Resource Information System. Updated and improved shoreline change information will advance understanding of the magnitude and causes of erosion and support informed and responsible coastal management decisions by coastal managers, shorefront landowners, and potential property buyers. The Coastal and Marine Geology Program of the U.S. Geological Survey (USGS) in cooperation with the Massachusetts Office of Coastal Zone Management, has compiled reliable historical shoreline data along open-facing sections of the Massachusetts coast under the Massachusetts Shoreline Change Mapping and Analysis Project 2013 Update. Two oceanfront shorelines for Massachusetts (approximately 1,370 km) were (1) delineated using 2008/09 color aerial orthoimagery, and (2) extracted from topographic LIDAR datasets (2007) obtained from NOAA's Ocean Service (NOS), Coastal Services Center (CSC). The new shorelines were integrated with existing MACZM and USGS historical shoreline data in order to compute long- and short-term rates using the latest version of the Digital Shoreline Analysis System (DSAS).
- U.S. Geological Survey, Coastal and Marine Geology Program
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