Statistical mapping of zones of focused groundwater/surface-water exchange using fiber-optic distributed temperature sensing
Water Resources Research
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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.
Study Area
| 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 |
| Google Analytic Metrics | Metrics page |