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

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doi: 10.1038/s41598-020-74696-4
Authors:Liu, Yi; Li, Jiang; Fasullo, John; Galloway, Devin L.
Author Affiliations:Primary:
Morgan State University, Department of Civil Engineering, Baltimore, MD, United States
National Center for Atmospheric Research, United States
U. S. Geological Survey, United States
Source:Scientific Reports, 10(17905). Publisher: Nature Publishing Group, London, United Kingdom. ISSN: 2045-2322
Publication Date:2020
Note:In English. 44 refs.
Summary: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.
Subjects:Aquifers; Coastal environment; Floods; Geologic hazards; Ground water; Land management; Mitigation; Natural hazards; Ocean circulation; Sea-level changes; Subsidence; Tides; Atlantic Ocean; Galveston County Texas; Galveston Texas; Gulf of Mexico; North Atlantic; Texas; United States
Coordinates:N180000 N300400 W0803000 W0980000
Record ID:894595-1
Copyright Information:GeoRef, Copyright 2021 American Geosciences Institute.
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