This is a shader I had put together for a personal project. It features water trails, foam, refraction, caustics, and depth fading. The trails were accomplished by rendering a particle system with an orthographic camera to a render.
For a more feature-complete water shader example, check out the one I made for Proxi:
https://ryantrimble3d.com/pages/proxi-tech-art
The password should have been included in any submitted application.