I would recommend a larger liner for a couple of reasons-
-you want to vary the width of the stream to create a variation in water flow.
-you want to vary the depth of the stream similarly..deeper where it is wider.
All waterfall height measurements must be added to the total needed length (3 waterfalls @ 1' height = 3' additional liner length).
What size pump are you going to use? If I am reading your measurements correctly, you will need around a 7,500 gph for minimal stream flow. What is the Grade (slope) that you will be working with?
Last edited by tadpole; 05-26-2010 at 11:06 AM.