Sometimes drawings are perfection without being colored, and I believe this is one of them. He looks very reflective, thoughtful, and perhaps a bit sad. Mayhap he is contemplating why he was the only to survive when all those others on the ships did not?
My firs contact with Voronwë I immediately thought of him as being a contemplative character. So I thought about this scene. Yes, you're right, maybe his mainly thoughts are about that tragedy. Thank you so much for your comment!
I think colouring might destroy the effect of the soft water. It's my favourite part here, how you showed it splashes on the rocks. And setting it together with the wind in his beautiful hair gave a wonderful effect. I'd like to sit there and watch with him how the water mirrors the sun.