Pretty girl, great shot. When I saw the thumbnail, I thought the model was walking into the sunset. I wonder if you took one like that? Anyway you could have tweaked up the cloud definition?
The desolation and the apparent detachment of the girl from her surroundings is very good and artistic. I'm not sure if this was posed or not, but if you could have the girl turn the other way, so more light falls on her face it would be better.