Question

question 22
2 pts
in humid environments, which source of water is the most significant contributor to stream discharge during storm events?
groundwater flow
overland flow
direct precipitation
question 23
2 pts
which of the following statements about a meandering stream system is true?
in a meandering stream, the thalweg is displaced towards the inside of meander bends.
the patterns of erosion and deposition in a meandering stream lead to reduced sinuosity over time.
cutbanks tend to form on the inside of meander bends.
the patterns of erosion and deposition tend to move sediment from the cutbank to the point bar.

Explanation:

Question 22

In humid environments during storms, overland flow (surface runoff from excess precipitation that can't infiltrate) is the main contributor to stream discharge. Groundwater flow is slower and more constant, direct precipitation into the stream is less significant than overland flow during storms.

• For the first option: Thalweg (deepest part of stream) is displaced to the outside of meander bends, not inside.
• Second option: Meandering streams typically increase sinuosity over time due to erosion/deposition patterns.
• Third option: Cutbanks (erosional banks) form on the outside of meander bends (higher velocity), point bars (depositional) on the inside.
• Fourth option: Erosion at cutbank (outside) and deposition at point bar (inside) moves sediment from cutbank to point bar. This is correct.

Answer:

B. Overland flow

Question 23