Upon a first glance I thought the halo around the girl was added, but when I looked closer, I saw that you - supposedly very deliberately - placed her so the shiny streak of wetter sand behind her would be EXACTLY there, i.e. right behind her. I assume that you meant to give her some "angel-like" aspect and decided the much brighter part of the wetter sand would serve your purpose, and if that was your thinking then I must say, yes, it did serve your purpose.
The points where her head and her foot are placed are well chosen, too, and I like that little bit of "action" of her letting the water run off her foot. The diagonal line of her leg brings another nice element to the photo, as does the fact, of course, that she is pretty, blond with curls, and dressed in white.
My only personal nitpick would be the line of water "cutting through" her head, but honestly: that is only a minor nitpick. Nothing important.