geography eassy

Question

"Both erosional and depositional coastal landforms are found along the coast in the eastern part of Hong Kong. Explain why."

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Answer 1

最佳解答

- the east and south-east monsoon are long fetch, the north-west north-east monsoon are medium fetch or even short fetch

- long fetch > high waves (energy strong = plunging breakers)

- high waves, short wavelength = destructive wave

- destructive wave: weak swash + strong backwash > remove material from beach = erosion

- erosion > sea caves (Po Pin Chau at Sai Kung), geo (Rocky Harbour at the south-east of Sai Kung Peninsula)

- the short fetch > sheltered area > sediment deposition

- form spits and bar (Pui O in Lantau Island)

2010-04-08 18:45:19 補充：

* But erosional landforms are more than depositional coastal landforms along the coast in the eastern part of Hong Kong.

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