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Q: Artificial harbours are constructed by providing structures which extend from the land to the sea so as to create a calm area for the berthing of vessels. Such structures are known as:
  • A. Breakwater
  • B. Groin
  • C. Wharf
  • D. Jetty
Correct Answer: Option A - : Breakwater– Breakwater are structures constructed near the coasts as part of coastal defense or to protect an anchorage from the effect of both weather and long shore drift. Groin– A groin, built perpendicular on the shore, is a rigid hydraulic structure built from ocean shore or from a bank, that interrupts water flow and limits the movement of sediment. Wharf– A Wharf, quay or staith is a structure on the shore of a harbour or on the bank of a river or canal where ships may dock to load and unload cargo or passenger. Jetties– Jetties protect the shoreline of a body of water by acting as a barrier against erosion from currents tide, and wave.
A. : Breakwater– Breakwater are structures constructed near the coasts as part of coastal defense or to protect an anchorage from the effect of both weather and long shore drift. Groin– A groin, built perpendicular on the shore, is a rigid hydraulic structure built from ocean shore or from a bank, that interrupts water flow and limits the movement of sediment. Wharf– A Wharf, quay or staith is a structure on the shore of a harbour or on the bank of a river or canal where ships may dock to load and unload cargo or passenger. Jetties– Jetties protect the shoreline of a body of water by acting as a barrier against erosion from currents tide, and wave.

Explanations:

: Breakwater– Breakwater are structures constructed near the coasts as part of coastal defense or to protect an anchorage from the effect of both weather and long shore drift. Groin– A groin, built perpendicular on the shore, is a rigid hydraulic structure built from ocean shore or from a bank, that interrupts water flow and limits the movement of sediment. Wharf– A Wharf, quay or staith is a structure on the shore of a harbour or on the bank of a river or canal where ships may dock to load and unload cargo or passenger. Jetties– Jetties protect the shoreline of a body of water by acting as a barrier against erosion from currents tide, and wave.