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Transient Analysis of Fluctuations of Electrical Conductivity as Tracer in the Streambed : Volume 9, Issue 5 (23/05/2012)

By Schmidt, C.

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Book Id: WPLBN0004013356
Format Type: PDF Article :
File Size: Pages 21
Reproduction Date: 2015

Title: Transient Analysis of Fluctuations of Electrical Conductivity as Tracer in the Streambed : Volume 9, Issue 5 (23/05/2012)  
Author: Schmidt, C.
Volume: Vol. 9, Issue 5
Language: English
Subject: Science, Hydrology, Earth
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2012
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Musolff, A., Trauth, N., Vieweg, M., Fleckenstein, J. H., & Schmidt, C. (2012). Transient Analysis of Fluctuations of Electrical Conductivity as Tracer in the Streambed : Volume 9, Issue 5 (23/05/2012). Retrieved from http://hawaiilibrary.net/


Description
Description: Department Hydrogeology, Helmholtz Centre for Environmental Research – UFZ, Permoserstrasse 15, 04318 Leipzig, Germany. 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.

Summary
Transient analysis of fluctuations of electrical conductivity as tracer in the streambed

Excerpt
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