Document Type

Article

Publication Date

2020

DOI

10.1029/2020GL090013

Publication Title

Geophysical Research Letters

Volume

47

Issue

18

Pages

e2020GL090013 (1-9)

Abstract

Hampton Roads is among the regions along the U.S. Atlantic Coast experiencing high rates of relative sea level rise. Partly to mitigate subsidence from aquifer compaction, Hampton Roads is injecting treated wastewater into the underlying aquifer. However, the GPS (Global Positioning System) station spacing (∼30 km) is too coarse to capture the spatial variability of subsidence and potential uplift from the injection. We present a cost‐effective workflow for generating an InSAR (interferometric synthetic aperture radar) and GPS combined displacement product. We leverage a live, open‐access archive of InSAR products generated from Sentinel‐1 data. We find an overall subsidence rate of −3.6 ± 2.3 mm/year with considerable spatial variability. The effects of groundwater injection are currently below detection. The workflow presented here is an asset for sustained monitoring of the injection effort and regional subsidence that is applicable along the U.S. coasts for assisting in mitigation and adaptation of relative sea level rise.

Comments

Published under an Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) license.

Original Publication Citation

Buzzanga, B., Bekaert, D. P., Hamlington, B. D., & Sangha, S. S. (2020). Towards sustained monitoring of subsidence at the coast using InSAR and GPS: An application in Hampton Roads, Virginia. Geophysical Research Letters, 47(18), 1-9, Article e2020GL090013. https://doi.org/10.1029/2020GL090013

ORCID

0000-0002-0602-3196 (Buzzanga)

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