Publication Details |
| Category | Text Publication |
| Reference Category | Journals |
| DOI | 10.5194/hess-16-3689-2012 |
| Title (Primary) | Transient analysis of fluctuations of electrical conductivity as tracer in the stream bed |
| Author | Schmidt, C.; Musolff, A.; Trauth, N.; Vieweg, M.
; Fleckenstein, J.H. |
| Source Titel | Hydrology and Earth System Sciences |
| Year | 2012 |
| Department | HDG |
| Volume | 16 |
| Issue | 10 |
| Page From | 3689 |
| Page To | 3697 |
| Language | englisch |
| UFZ wide themes | TERENO; |
| Abstract | Magnitudes and directions of water flux in the streambed are
controlled by hydraulic gradients between the groundwater and
the stream and by bedform-induced hyporheic exchange
flows. These water fluxes vary over time driven by for
instance by short term flood events or seasonal variations in
stream flow and groundwater level. Variations of electrical
conductivity (EC) are used as a natural tracer to detect
transient travel times and flow velocities in an
in-stream-gravel bar. We present a method to estimate travel
times between the stream and measuring locations in the gravel
bar by non-linearly matching the EC signals in the time
domain. The amount of temporal distortion required to obtain
the optimal matching is related to the travel time of the
signal. Our analysis revealed that the travel-times increased
at higher stream flows because lateral head gradients across
the gravel bar are leveled at the time. |
| Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=12774 |
| Schmidt, C., Musolff, A., Trauth, N., Vieweg, M., Fleckenstein, J.H. (2012): Transient analysis of fluctuations of electrical conductivity as tracer in the stream bed Hydrol. Earth Syst. Sci. 16 (10), 3689 - 3697 10.5194/hess-16-3689-2012 |
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