The 3 sections of gutter have different functions: the first section is where the wave is created (by sloping the gutter section full of water), the wave then propagates through the middle gutter section and runs up towards the third section which gently slopes upwards.
Disclaimers: This model does not model the deep ocean characteristics of tsunami. Wave propagation speeds are slow due to the depth of inches rather than miles.
Step 1: Creating a Water Proof Hinge
Step 2: Capping the Wave Generation End
Step 3: Attaching the Middle and Sloping Gutter Sections
This joint does not need to hinge and only a single section of duct tape needs to be applied to each side of the gutters.