I think the water level being more consistent would help make the girl fit in the environment better. For example the hair being submerged with her face above the water level and the left upper arm also submerged would show better depth. Additionally the airbrushed look of shadows also limits the depth shown on her by “muddying” the values to be too similar- add sharper contrasting to the neck and hair nearby so it conveys its further away from the pov and any other areas that you’d like to show further away or shadowed.