I'm bidding on a back yard feature with a drop of about 7 feet. It will be 35' to 40' long and end to a basin which will be incorporated into a 23' radius pave stone patio with fire pit. I figured I would make it meander through 2 or 3 curves and have 7 to 10 falls, maybe a few falls with more than one cascade. Should I have less falls with a greater drop? Or would 8 to 10'' per fall give the sound effect that we want to create? I want it to be heard from the upper patio 30' away from the start of the falls (70' away from the basin and last fall). Also, how many GPM should I use on a feature of this size? and how wide should I plan to make it? I was thinking 3' wide or so? Thanks for looking and I appreciate any advice for my design. I'm going to do some image editing with pro landscape eventually for this project, and I will post the proposed look after I'm done.