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

Water Resources Research

By:
, , and
DOI: 10.1002/wrcr.20458

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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