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Land subsidence and relative sea-level rise in the southern Chesapeake Bay region

Circular 1392

Prepared in cooperation with the Hampton Roads Planning District Commission
By:
,
DOI: 10.3133/cir1392

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Abstract

The southern Chesapeake Bay region is experiencing land subsidence and rising water levels due to global sea-level rise; land subsidence and rising water levels combine to cause relative sea-level rise. Land subsidence has been observed since the 1940s in the southern Chesapeake Bay region at rates of 1.1 to 4.8 millimeters per year (mm/yr), and subsidence continues today.


This land subsidence helps explain why the region has the highest rates of sea-level rise on the Atlantic Coast of the United States. Data indicate that land subsidence has been responsible for more than half the relative sea-level rise measured in the region. Land subsidence increases the risk of flooding in low-lying areas, which in turn has important economic, environmental, and human health consequences for the heavily populated and ecologically important southern Chesapeake Bay region.


The aquifer system in the region has been compacted by extensive groundwater pumping in the region at rates of 1.5- to 3.7-mm/yr; this compaction accounts for more than half of observed land subsidence in the region. Glacial isostatic adjustment, or the flexing of the Earth’s crust in response to glacier formation and melting, also likely contributes to land subsidence in the region.

Geospatial Extents

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Land subsidence and relative sea-level rise in the southern Chesapeake Bay region
Series title:
Circular
Series number:
1392
DOI:
10.3133/cir1392
Year Published:
2013
Language:
English
Publisher:
U.S. Geological Survey
Publisher location:
Reston, VA
Contributing office(s):
Virginia Water Science Center
Description:
iv, 24 p.
Number of Pages:
32
Country:
United States
State:
Virginia
Other Geospatial:
Chesapeake Bay
Additional Online Files(Y/N):
N