EricofSD, just wanted to show yet another way to connect edges as quads when creating ripples, ribs, or such.  This technique is a bit different than the other two; it's merely a "distance connection" built through a specific area of an edge ring, with a quad corner used to cap off the end (notice the Ngon it creates before subD):

And here's that technique, after an iteration of Catmull-Clark SubD (the ngon is subdivided now into a tringular quad and a 5 way junction)...

This is very similar to the first example, but the first one is a little more precise and elegant, because it uses a selection of inset polygons to start, and the edges you manipulate to create the ripple/bulge are part of a complete edge loop.

I'm sure there's even more ways to go about it, but I think one of these techniques would be how I attack that kind of topological deformation.

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