Colored Sand Infiltration Experiment (Mobile Gravel)
This is one of the colored sand experiments from the paper:
Gibson, S. A., Abraham, D., Heath, R. and Schoellhamer, D. (2011) Visualization and Analysis of Temporal Trends of Sand Infiltration into a Gravel Bed. Water Resources Research, 47, W12610.
https://agupubs.onlinelibrary.wiley.c...
The other experiments in this paper explored how colored sand infiltrated into static gravel. In this experiment, we increased the shear stress until we achieved a quasi-equilibrium gravel transport. Then we introduced the sand (color in these experiments is a temporal tracer - indicating when the sand was introduced). This mobile gravel experiment did not form a sand seal which resulted in what we called "secondary infiltration" - infiltration throughout the experiment.
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