Hand in water flow
By jesseg 190 234 [698] 1247 2645 4538 8579 kbps | flash [html5] auto download

Not sure what to say about this one. This is a small Cipoletti weir for measuring the flow of water in an irrigation stream.

But the water flow was so smooth you could see right through the top, so I put my hand in from underneath as well as causing interference ripple patterns on the top.

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