Weathering, erosion and sedimentation：練習問題

Which type of shoreline morphology is most likely to develop in a littoral zone characterized by high wave energy and a high rate of erosion?

In an experiment investigating sediment transport, it was observed that a water velocity of \( 100 \text{ cm s}^{-1} \) was required to erode a specific grade of sand, but it remained in transport until the velocity dropped below \( 20 \text{ cm s}^{-1} \). What does this relationship indicate about sedimentation?

Which type of erosion involves the transport of sediment due to the downward pull of its own weight?

Which of the following best describes the process of sedimentation in a marine environment?

Which of the following is an example of organic weathering?

Define the littoral zone by stating the two specific tide marks that determine its boundaries on a shoreline.

Distinguish between the process of weathering and the process of erosion in the context of coastal rock formations.

Define the term sedimentation as it applies to the formation of different types of shorelines in the littoral zone.

The morphology of the littoral zone is determined by the balance of geological processes.

(a) Distinguish between the processes of weathering and erosion.

(b) Explain how the speed of water flow and the process of sedimentation result in the formation of a muddy shore compared to a rocky shore.

The morphology of a delta is determined by the balance between river flow and coastal processes.

(a) Define sedimentation and describe how a decrease in the speed of water flow leads to the deposition of particles.

(b) Using a provided chart showing sediment distribution, explain why larger particles like gravel are found further upstream while fine silt is found at the river mouth.

(c) Describe two environmental conditions required for the formation of a muddy shore in a sheltered estuary.