Estimate the velocity of wastewater flowing through a grit channel if a stick travels 32 feet in 36 seconds.

To estimate the velocity of wastewater flowing through a grit channel, you start by calculating the speed of the stick by dividing the distance it traveled by the time it took. In this scenario, the stick traveled 32 feet in 36 seconds.

The formula to calculate velocity is:

Velocity = Distance / Time

Substituting the given values:

Velocity = 32 feet / 36 seconds ≈ 0.8889 ft/sec

When you round this value to one decimal place, it becomes approximately 0.9 ft/sec. Therefore, the estimated velocity of the wastewater is best represented by this value, confirming that this is indeed the appropriate choice.

Understanding this calculation is essential because it reflects how flow velocity impacts the design and operation of wastewater treatment processes. Accurate estimations of flow rates are crucial for the efficiency and effectiveness of grit channels and other treatment infrastructure.