CAC Stream and Waterfall Construction 3

Question 1

Which tool is most commonly used on a job site to level the top edge of a stream berm before liner installation?

Accepted Answer

Rotary laser level

Answer

Carpenter's plumb bob

Answer

Transit theodolite

Answer

Water manometer

Question 2

How does installing a check valve on the pump discharge line benefit a stream and waterfall system?

Accepted Answer

It prevents backflow from draining the feature when the pump shuts off

Answer

It increases the pump's flow rate

Answer

It filters particles before they enter the stream

Answer

It regulates water temperature

Question 3

What is a 'disappearing stream' in aquascape terminology?

Accepted Answer

A stream feature where water flows into a hidden below-grade basin rather than a visible pond

Answer

A stream that runs underground for part of its course

Answer

A stream disguised with heavy plantings on both banks

Answer

A seasonal stream that runs only during rain events

Question 4

During stream construction on a slope with unstable soil, which technique prevents the liner from shifting downhill over time?

Accepted Answer

Using a soil anchor trench at the stream header and along the berm edges

Answer

Staking the liner with rebar every 6 feet

Answer

Applying concrete adhesive to the liner underside

Answer

Installing retaining walls on both sides of the stream

Question 5

What is the recommended practice when two sections of EPDM liner must be seam-bonded together in a stream?

Accepted Answer

Clean, prime, and bond with EPDM splice tape and seam primer per manufacturer specs

Answer

Use waterproof tape only

Answer

Heat-weld the liner sections together with a torch

Answer

Overlap and pin with stainless steel staples

Question 6

When creating naturalistic bends in a constructed stream, what design principle helps determine where curves should be placed?

Accepted Answer

Curves should occur where the slope changes or at boulder outcroppings, mimicking natural geology

Answer

Curves should be evenly spaced every 10 feet

Answer

Streams should only curve when necessary to avoid structures

Answer

The number of curves must equal the number of waterfall tiers

Question 7

After completing stream and waterfall construction, what is the first operational test that should be performed before backfilling and finishing the site?

Accepted Answer

Fill the system and run the pump for 24 hours to check for leaks and confirm water level stability

Answer

Add fish to verify water quality is acceptable

Answer

Apply fertilizer to newly planted streamside plants

Answer

Paint exposed liner edges with UV-resistant coating