Single‐hole GPR reflection imaging of solute transport in a granitic aquifer

@article{Dorn2011SingleholeGR,
  title={Single‐hole GPR reflection imaging of solute transport in a granitic aquifer},
  author={Caroline Dorn and Niklas Linde and Tanguy Le Borgne and Olivier Bour and Ludovic Baron},
  journal={Geophysical Research Letters},
  year={2011},
  volume={38}
}
Identifying transport pathways in fractured rock is extremely challenging as flow is often organized in a few fractures that occupy a very small portion of the rock volume. We demonstrate that saline tracer experiments combined with single‐hole ground penetrating radar (GPR) reflection imaging can be used to monitor saline tracer movement within mm‐aperture fractures. A dipole tracer test was performed in a granitic aquifer by injecting a saline solution in a known fracture, while repeatedly… 

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References

SHOWING 1-9 OF 9 REFERENCES

Comparing flux‐averaged and resident concentration in a fractured bedrock using ground penetrating radar

Saline tracer transport experiments were performed to compare flux‐averaged and resident concentration in a single subhorizontal fracture in sandstone bedrock. Tracer migration over a 14 m distance

Time‐lapse imaging of saline‐tracer transport in fractured rock using difference‐attenuation radar tomography

Accurate characterization of fractured‐rock aquifer heterogeneity remains one of the most challenging and important problems in groundwater hydrology. We demonstrate a promising strategy to identify

Four dimensional mapping of tracer channelization in subhorizontal bedrock fractures using surface ground penetrating radar

To observe flow channeling in situ, surface ground‐penetrating radar (GPR) was used to detect a saline tracer moving through a sub‐horizontal bedrock fracture. The tracer is mapped using amplitude

Ground-penetrating-radar response to fracture-fluid salinity: Why lower frequencies are favorable for resolving salinity changes

Time-lapse ground-penetrating-radar GPR surveys exploit signal-amplitude changes to monitor saline tracers in fractures and to identify groundwater flow paths. However, the relationships between GPR

A Practical Guide to Wavelet Analysis.

A practical step-by-step guide to wavelet analysis is given, with examples taken from time series of the El Nino–Southern Oscillation (ENSO). The guide includes a comparison to the windowed Fourier