How to draw the reflection of the building on the water surface in sketching?

The reflection of the building is the shape of the building is inverted in the lower part of the water, the building's light and dark surface will also affect the reflection of the depth of the water pattern is generally used in the horizontal direction of the line performance.

As a sketch, the building itself does not have to draw specific, reflection is more unnecessary to draw carefully, at the same time there are waves on the water surface, which will lead to uncertainty about the shape of the reflection. So simple treatment is not bad.

There are also counting white when the water, then the water surface reflection is also free.