How fast would someone have to run to run over water?

I was thinking about Flash, the superhero, or the little boy in the Incredibles.

There is one Yahoo answer that doesn't answer a lot. Especially, I don't think surface tension would help a lot for a human to run over water, I think one would have to build on the inertial effect of the water.

There is one empirical approach based on figuring out the speed at which bare-footed water skiing is done, but I wasn't able to find a decent number. Still the difference may be that a hypothetical runner would have to propulse herself over the water, which may or may not make the thing more difficult.

Hence, I raise the question here.

-
I think it might not matter how fast you run, but how much you push down. – Alan Rominger Aug 20 '12 at 20:05
@AlanSE, I think one would have to assume that the downward component of force would be equal to (or slightly more than) the weight of the runner; I'm not sure how this could be varied. – AdamRedwine Aug 20 '12 at 20:43
Well, if you could run this fast... – Mike Dunlavey Aug 20 '12 at 21:02
@AdamRedwine if you are running with your feet hitting at an angle to the water then it will be a component of your forward speed. This is the limit to the speed of sprinters on a track, how hard they can push down, and so how much friction they can generate – Martin Beckett Aug 20 '12 at 23:14
Based on personal observation, a person needs to go approximately 45 mph on water to continue barefoot skiing on one foot. Thus, if you can run this fast, the implication is that your feet would strike the water surface quickly enough to remain on the water surface. Unfortunately, such a person would have very little control of where he was going. – David White Jul 4 at 17:54