Do Now: Particle Size vs. Velocity

What is the minimum water velocity necessary to maintain movement of 0.1-centimeter-diameter particles in a stream?

• 0.02 cm/s

• 0.5 cm/s

• 5.0 cm/s

• 20.0 cm/s

A stream’s velocity decreases from 100 cm/s to 5cm/s. Which size sediment particles will still be transported by the stream?

• pebbles, sand, silt, and clay

• sand, silt, and clay, only

• silt and clay, only

• clay, only

The largest sediment particles that can be transported by a stream traveling at a velocity of 200 centimeters per second are

• boulders

• cobbles

• pebbles

• sand

The largest particles that a stream deposits as it enters a pond are 8 centimeters in diameter. The minimum velocity of the stream is approximately

• 100 cm/sec

• 200 cm/sec

• 300 cm/sec

• 400 cm/sec

What is the minimum rate of flow at which a stream can maintain transport of boulders?

• 100 cm/sec

• 300 cm/sec

• 200 cm/sec

• 400 cm/sec