Water is one of my favorite subjects in art (especially rivers, creeks, and ponds), so I tend to be a bit critical when it comes to how it's captured.
That being said, I think you did a splendid job. The image has a sort of softness to it that one would typically feel in a lazy, early-summer afternoon. No one around...just water.
The pastel tone was a good choice for this piece. I'm typically not a pastel-lover when it comes to color pallet, but somehow you made it into something I like. It doesn't feel dull or washed out or muted at all. It feels purposefully quiet, but there's life hidden in there that could spring out any second.
All in all, very well done!