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There were a couple of flash floods so far during the 2011 summer monsoon season here in Arivaca. Unfortunately, I wasn't at the property the time of the floods to catch it on film.
The first picture below shows a buildup of sandy gravel across the driveway. The rock gabion (now almost covered at left) slowed down the water flow allowing the sand/gravel to deposit on the driveway.
This is exactly what I wanted as a 'design' goal when I chose the location of the gabion. If there was no gabion, these fast-moving flash floods would be carving-out 'ruts' in the driveway, resulting in vehicles possibly getting stuck or having the rear of vehicles bottom-out as they crossed. In addition, I would have to spend time filling-in the rut after each flood.
Another benefit from the deposit of the sand/gravel is that I need to use this sand when mixing cement for the concrete bond-beams that will be supporting and connection the walls and roof on my cob studio I am currently building on the property.
The photo below is a current upstream shot of the gabion looking downstream.
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