Sure you can - if local regs let you get away with it. How many do you think it will take to do the job? I expect you'll place them side by side so they are end-on to the water. And that makes it easy to chain them together. The other way with the flat side to the water doesn't make much sense.
I've been thinking about doing the same thing as a flood barrier . They are only two feet wide at the base, so it takes quite a few.
The ones I see have lift points cast into the top which makes them easy to place. If you are thinking of placing them with a backhoe and chain through the lift points....Well, I tried that with a 3500 lb concrete well top last fall. A full size backhoe back hoe was barely up to the task. It did it, but I carefully kept the weight in close to the tractor. Even so, the front end got light. Made me wish for an excavator.
Or maybe just use the loader instead.
rScotty