i'm sorry mr. heronblu (ewest and theo LOL) but the first thing came to my mind was also the fluid dynamic of a toilet bowel...LIBWIC (laughing inside, but where it counts)
beyond toilets, perhaps we can apply it to ponds cause it sure sounds good to me in theory.
theo, dont forget fractal theory....(i.e. same or similar processes and phenomena occur on all levels of scale....couple examples
1)galactic spin, solar spin/orbit, terrestrial spin/orbit, electron spin/orbits
2) the geomorphology of continental delta/shoreline formation versus patterns observed in small puddles after a rainstorm (tiny rivers, deltas, and shorelines)
why not wind and current meterological patterns from ocean to pond?
