Protecting the Chapel: Use of Walls, Water, Walkway for Barrier

I'm thinking of using walls to accomplish several specific roles in my project:
1) To contain space
2) To give "users" direction
3) To constrain sight lines
4) To block sound
5) To frame views

Some effective "walls" I've seen that I'd like to influence my project are from Tadao Ando's Sayamaki History Museum, and Mario Botta's Chapel at Monte Tamaro (pictures below).

Ando's Sayamaki Histori Museumtop of Botta's Chapel at Monte Tamaro

What I'm hoping to do is combine these two elements (the Botta zen view on top of the tunnel like walkway and water wall from Ando). The left side of the wall (the rigid wall/not water) will serve as structural support, and block sound, and sight lines from the road and city outside of the chapel complex, while the water will serve as white noise that helps to reduce the city influence and hopefully contributes to the tranquil and natural qualities of the chapel.

I additionally like Ando's use of the entrance wall at the Water Temple of Hompuku Ji, shown below.

I'd like to use a similar wall on my entrance to, again, "protect" the sacred space inside, and also force the user to look left and right when coming to this juncture. This provides a logical change of direction for the user, and I'm thinking of having a space that opens up to the left to make the user move that direction (instead of to the right, where I'll have a gate).

Thoughts? I welcome any and all feedback, especially negative (b/c that's the most productive!)