He makes great watercolours of that region, the Biesbosch. The landscape there are mostly wide rivers and marshes, but very beautiful and peaceful. Exactly what he manages to convey in his paintings.
During the opening I saw an old powerfull B&W picture of a boat stuck in the ice. Shot a hazy photo with my camera.
I used a water soluble brushpen (Koi-Sakura) in this drawing: almost all the grey tones come from diluting the ink and spreading it, to achieve that cold hazy look.
Not convinced by the result, but I am getting there.