Basic water animation 2D

[thiberi0]

Hello guys,
I am trying to do some basics 2D animation with Qt, using the State Machine Framework. The animation should simulate the change in the elevation of water in reservoir. I already archive this, using labels and animating the geometry property. I would like to know if Qt offer some class to make the "water" looks more realistic.Any tips to make this more realistic is welcome too.

Images from animation:
http://postimg.org/gallery/kd0k7u5c/26dc82ef/