Here are a couple tripod mounted shots of my next door creek. We had some rain and then it cleared and a full moon came out. I went down to try to catch the extra current from the rain, lit by the moonlight. In general I am not very fond of long water exposures, because it makes water look like thick oil or a silk cloth. And these two images sort of exemplifies my point. The first is in my view a much better images than the second (none of them are really good, but I wanted to prove a point) one, because it has a lot more energy in the water. Judge for yourself.
1DX, 2.5s, f2.0 (a bit shallow), ISO100