Investigation of aquifer-estuary interaction using wavelet analysis of fiber-optic temperature data

Geophysical Research Letters
By: , and 

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Abstract

Fiber-optic distributed temperature sensing (FODTS) provides sub-minute temporal and meter-scale spatial resolution over kilometer-long cables. Compared to conventional thermistor or thermocouple-based technologies, which measure temperature at discrete (and commonly sparse) locations, FODTS offers nearly continuous spatial coverage, thus providing hydrologic information at spatiotemporal scales previously impossible. Large and information-rich FODTS datasets, however, pose challenges for data exploration and analysis. To date, FODTS analyses have focused on time-series variance as the means to discriminate between hydrologic phenomena. Here, we demonstrate the continuous wavelet transform (CWT) and cross-wavelet transform (XWT) to analyze FODTS in the context of related hydrologic time series. We apply the CWT and XWT to data from Waquoit Bay, Massachusetts to identify the location and timing of tidal pumping of submarine groundwater.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Investigation of aquifer-estuary interaction using wavelet analysis of fiber-optic temperature data
Series title Geophysical Research Letters
DOI 10.1029/2008GL036926
Volume 36
Issue 6
Year Published 2009
Language English
Publisher Wiley
Contributing office(s) Toxic Substances Hydrology Program, OGW Branch of Geophysics
Description L06403; 6 p.