Gradient used to mimic neutral density filter along horizon

[rich2005]

hmmm...might work

1. The original
2. A copy with the blue curve pulled to adjust the foliage and some of the reflections but leaves a blue caste over the clouds.

The mask can have hard edges. Black leaves the sky and bottom largely the same. White center blends the two layers. You need to experiment a little with the shape.

https://i.imgur.com/dgD4bmk.jpg