That's one way of controlling nature's finicky elements.
Studying river erosion in nature is a difficult subject, as the elements cannot be controlled. You can’t, for instance, remove rock and add greenery to see what effects it has on the river’s surroundings.
This is why researchers at the University of Sherbrooke, in Quebec, Canada, built an artificial river that can be turned off and on and whose elements can be completely controlled.The ambitious project consists of a 90m x 40m watershed, a 50m x 3m artificial river, and an accompanying pond designed to be fed only by rainwater. In total, it is estimated that the aqueous structure will contain about 3500 cubic meters of water, equivalent to an Olympic pool.
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