| Summary: | 碩士 === 國立中興大學 === 土木工程學系 === 85 === In this paper, a numerical simulation model involving wave,
current and beach evolution simulation is used to simulate the
shoreline changes between two headlands. Various arrangements
including directions, lengths, offshore distances and apart
distances of headlands are calculated to explore the optimum
headland control in the coastal defense. The wave condition and
the bottom slope of Mir-Tuor Coast in the west-southern Taiwan
are used in the simulation. The results from this elementary
study show that the salient type behind headlands may be formed
in the simulation area due to the smaller wave energy and too
mild bottom slope. It may be inferred the better arrangement of
headlands from the study and specified as followings. (I) The
direction of headland parallel to the wave crest line is
favorable. (II) The headland is suggested to locate just at the
outside of surf zone and the apart distance be greater than the
offshore distance of headlands. (III)The suitable length of
headland will make better types of salient, too short headland
is not favorable.(VI)To form a tombolo behind headland,
artificial renourishment may be considered.
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