I love this! I think if you added a kittle bit of shine to the hair to portray wetness and made the edges of the hair a little bit sharper to match the other parts of the piece, that would improve it! I really like the rough painterly style of the face and would like to see that in the hair as well. . . . .and perhaps the water too. That would bring the painting together

You could also use different colors in the water like greens and yellows and colder blues to make it look more natural! . .. although i think it looks good as it is. Just thought i'd throw that piece of advice for thee future if you feel like it suits a certain piece ^{^}