Question

1. what is the largest particle that can be transported by a stream moving at 0.1 cm/s?
2. during heavy rainfall, a streams velocity increases from 1 cm/s to 100 cm/s. what new types of particles could the stream begin to carry?
3. youre on a hike, and most of the sediment you see in a river are cobbles and pebbles. are you likely towards the beginning or end of the river? explain why you think that.

streambed & erosion application

1. where would you expect to find larger particles - on the inside or outside of a river bend? explain why.
2. if the stream velocity is faster on the outer curve of a meander, which particles are likely to remain in motion there?
3. why does silt and clay settle on the inner bank while pebbles and sand are found on the outer bank of a bend?
4. during a flood, the stream velocity increases sharply. what changes in particle size might you observe along the streambed?
5. if the velocity of a stream drops rapidly after a storm, which particles will settle first, and why?
6. how does increased stream velocity affect the streams ability to erode particles?
7. what types of particles are most easily eroded when the stream velocity is low?
8. why are larger particles harder to erode even in fast - moving sections of a stream?
9. how does stream velocity affect the depth and shape of a streambed over time?
10. if the velocity of a stream increases from 10 cm/s to 100 cm/s, how will the rate of erosion change?

additional practice questions

1. why do larger particles, such as boulders, require a higher stream velocity to be transported compared to smaller particles, like sand?
2. why might silt and clay require a slightly higher velocity than you might expect, despite their small size?
3. how might a flood, which increases stream velocity, affect the size of particles transported by a river?

Explanation:

1. Larger particles are typically found on the outside of a river bend because the faster - moving water on the outside has more erosive power and can carry larger particles. The inside of the bend has slower - moving water which deposits smaller particles.
2. On the outer curve of a meander, where the stream velocity is faster, larger and heavier particles are more likely to remain in motion as the higher velocity water has the energy to keep them suspended and moving.
3. Silt and clay settle on the inner bank as the water is slower there, lacking the energy to carry these fine particles. Pebbles and sand are found on the outer bank as the faster - moving water can transport and deposit them there.
4. During a flood, with increased stream velocity, the stream can carry larger and more numerous particles. The size of particles transported along the streambed will increase.
5. Larger and heavier particles will settle first when the stream velocity drops rapidly after a storm as they require more energy (higher velocity) to remain in suspension.
6. Increased stream velocity increases the stream's ability to erode particles as it has more kinetic energy to dislodge and carry particles.
7. Fine particles like silt and clay are most easily eroded when the stream velocity is low as they require less energy to be moved.
8. Larger particles are harder to erode even in fast - moving sections because they have more mass and require more force (higher velocity and energy) to be dislodged and transported.
9. Higher stream velocity leads to deeper and more incised streambeds over time as more erosion occurs. Lower velocity results in shallower and wider streambeds with more deposition.
10. As the stream velocity increases from 10 cm/s to 100 cm/s, the rate of erosion will increase significantly as the kinetic energy of the water increases, allowing it to erode more material.
11. Larger particles like boulders require more force to be moved, so a higher stream velocity is needed to overcome their weight and friction.
12. Silt and clay may require a slightly higher velocity than expected despite their small size because they can clump together due to cohesive forces, increasing their effective size and the energy needed to move them.
13. A flood, by increasing stream velocity, allows the river to transport larger and more particles, changing the sediment load and potentially reshaping the river channel.

Answer:

1. On the outside. Faster water on outside can carry larger particles.
2. Larger and heavier particles. Higher velocity on outer curve provides enough energy.
3. Silt and clay on inner bank due to slow water; pebbles and sand on outer bank due to fast water.
4. Larger and more particles will be transported.
5. Larger and heavier particles. Need more energy to remain suspended.
6. Increases as more kinetic energy for erosion.
7. Fine particles like silt and clay. Require less energy to move.
8. Have more mass, need more force to dislodge.
9. Higher velocity: deeper and more incised; lower velocity: shallower and wider.
10. Increases significantly due to increased kinetic energy.
11. Need more force to overcome weight and friction.
12. Can clump together, increasing effective size.
13. Allows transport of larger and more particles, may reshape channel.