Armored spillways are designed to do which of the following?

Armored spillways are designed to do which of the following?

• A. To safely convey excess stormwater flow while preventing erosion.
• B. To reduce evaporation of runoff water.
• C. To regulate rainfall by storing water.
• D. To protect downstream channels from sediment.

Answer: (A)

Armored spillways are built to safely convey excess stormwater flow and prevent erosion by using durable materials that resist the high-velocity, abrasive action of water. When flows exceed the capacity of the regular channel, the armored surface dissipates energy as the water spills or runs down, reducing the potential for scour of the spillway, banks, and downstream channel. This stability prevents structural damage and maintains protection downstream during big storms. They aren’t intended to reduce evaporation, store water, regulate rainfall, or primarily control sediment; their main role is safe conveyance of excess flow through erosion-resistant surfaces, keeping the system and nearby channels intact.

Armored spillways are built to safely convey excess stormwater flow and prevent erosion by using durable materials that resist the high-velocity, abrasive action of water. When flows exceed the capacity of the regular channel, the armored surface dissipates energy as the water spills or runs down, reducing the potential for scour of the spillway, banks, and downstream channel. This stability prevents structural damage and maintains protection downstream during big storms. They aren’t intended to reduce evaporation, store water, regulate rainfall, or primarily control sediment; their main role is safe conveyance of excess flow through erosion-resistant surfaces, keeping the system and nearby channels intact.