Statistical mapping of zones of focused groundwater/surface-water exchange using fiber-optic distributed temperature sensing
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.
Citation Information
Publication Year | 2013 |
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Title | Statistical mapping of zones of focused groundwater/surface-water exchange using fiber-optic distributed temperature sensing |
DOI | 10.1002/wrcr.20458 |
Authors | Kisa Mwakanyamale, Frederick D. Day-Lewis, Lee D. Slater |
Publication Type | Article |
Publication Subtype | Journal Article |
Series Title | Water Resources Research |
Index ID | 70074270 |
Record Source | USGS Publications Warehouse |
USGS Organization | Office of Groundwater-Branch of Geophysics |