Statistical mapping of zones of focused groundwater/surface-water exchange using fiber-optic distributed temperature sensing

Water Resources Research
By: , and 

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Abstract

Fiber-optic distributed temperature sensing (FO-DTS) increasingly is used to map zones of focused groundwater/surface-water exchange (GWSWE). Previous studies of GWSWE using FO-DTS involved identification of zones of focused GWSWE based on arbitrary cutoffs of FO-DTS time-series statistics (e.g., variance, cross-correlation between temperature and stage, or spectral power). New approaches are needed to extract more quantitative information from large, complex FO-DTS data sets while concurrently providing an assessment of uncertainty associated with mapping zones of focused GSWSE. Toward this end, we present a strategy combining discriminant analysis (DA) and spectral analysis (SA). We demonstrate the approach using field experimental data from a reach of the Columbia River adjacent to the Hanford 300 Area site. Results of the combined SA/DA approach are shown to be superior to previous results from qualitative interpretation of FO-DTS spectra alone.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Statistical mapping of zones of focused groundwater/surface-water exchange using fiber-optic distributed temperature sensing
Series title Water Resources Research
DOI 10.1002/wrcr.20458
Volume 49
Issue 10
Year Published 2013
Language English
Publisher American Geophysical Union
Publisher location Washington, D.C.
Contributing office(s) Office of Groundwater-Branch of Geophysics
Description 6 p.
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Water Resources Research
First page 6979
Last page 6984
Country United States
State Washington
City Richland
Other Geospatial Columbia River