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Land subsidence contributions to relative sea level rise at tide gauge Galveston Pier 21, Texas

October 21, 2020

Relative sea level rise at tide gauge Galveston Pier 21, Texas, is the combination of absolute sea level rise and land subsidence. We estimate subsidence rates of 3.53 mm/a during 1909–1937, 6.08 mm/a during 1937–1983, and 3.51 mm/a since 1983. Subsidence attributed to aquifer-system compaction accompanying groundwater extraction contributed as much as 85% of the 0.7 m relative sea level rise since 1909, and an additional 1.9 m is projected by 2100, with contributions from land subsidence declining from 30 to 10% over the projection interval. We estimate a uniform absolute sea level rise rate of 1.10 mm ± 0.19/a in the Gulf of Mexico during 1909–1992 and its acceleration of 0.270 mm/a2 at Galveston Pier 21 since 1992. This acceleration is 87% of the value for the highest scenario of global mean sea level rise. Results indicate that evaluating this extreme scenario would be valid for resource-management and flood-hazard-mitigation strategies for coastal communities in the Gulf of Mexico, especially those affected by subsidence.

Citation Information

Publication Year 2020
Title Land subsidence contributions to relative sea level rise at tide gauge Galveston Pier 21, Texas
DOI 10.1038/s41598-020-74696-4
Authors Yi Liu, Jiang Li, John Fasullo, Devin Galloway
Publication Type Article
Publication Subtype Journal Article
Series Title Scientific Reports
Index ID 70215538
Record Source USGS Publications Warehouse
USGS Organization WMA - Earth System Processes Division

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