Estimating 3D variation in active-layer thickness beneath arctic streams using ground-penetrating radar
Journal of Hydrology
By: T.R. Brosten, J.H. Bradford, J. P. McNamara, M.N. Gooseff, J.P. Zarnetske, W.B. Bowden, and M.E. Johnston
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Abstract
We acquired three-dimensional (3D) ground-penetrating radar (GPR) data across three stream sites on the North Slope, AK, in August 2005, to investigate the dependence of thaw depth on channel morphology. Data were migrated with mean velocities derived from multi-offset GPR profiles collected across a stream section within each of the 3D survey areas. GPR data interpretations from the alluvial-lined stream site illustrate greater thaw depths beneath riffle and gravel bar features relative to neighboring pool features. The peat-lined stream sites indicate the opposite; greater thaw depths beneath pools and shallower thaw beneath the connecting runs. Results provide detailed 3D geometry of active-layer thaw depths that can support hydrological studies seeking to quantify transport and biogeochemical processes that occur within the hyporheic zone.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Estimating 3D variation in active-layer thickness beneath arctic streams using ground-penetrating radar |
| Series title | Journal of Hydrology |
| DOI | 10.1016/j.jhydrol.2009.05.011 |
| Volume | 373 |
| Issue | 3-4 |
| Year Published | 2009 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Journal of Hydrology |
| First page | 479 |
| Last page | 486 |
| Google Analytic Metrics | Metrics page |