碩士 / 淡江大學 / 水資源及環境工程所 / 83 / The coast has been shocked by the fatal forces of the
nature and the sedimentation then showed complicate
geomorphic processes. It is the results that the sediments are
transported by waves. This study is mainly to establish a
numerical model, and to simulate the topographical changes
caused by these incident waves, as a dune located on a
sloping beach. The onshore-offshore sedimentation on a
sloping beach and the quantities of the eroding dune then
have been simulated. This numerical model of onshore-offshore
sediment transport developed by Tang(1993) and modified by
Chern(1995) is used in this study. It includes hydrodynamic
model and sedimentation model. In hydrodynamic model, using
Hibberd & Peregrine(1979) which was based on the shallow
water wave theory, the numerical scheme simulates the wave
uprush phenomenon. As the wave backwash, Ho & Meyer(1962)'
s viewpoint, which considered the major backwash mechanism
as the free falling motion, has been utilized. The sediment
ation model is based on the concept of total load developed
by Bagnold (1966). By using the energy conservation
concept, the kinetic energy of the incident waves had been
transformed into the potential energy which was
infiltrated into the dune. We have discussed the quantities
of the sedimentation and the eroded dune for different wave
heights, wave periods, beach slopes and dune locations. The
comparison with the results of Tsou(1994) and Chern(1995) has
also been studied.
| Identifer | oai:union.ndltd.org:TW/083TKU00087011 |
| Date | January 1995 |
| Creators | Suey-Der Chern, 陳穗德 |
| Contributors | I-Chen Lin, 林意楨 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 80 |
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