碩士 / 國立成功大學 / 水利及海洋工程學系碩博士班 / 92 / In this study we use the numerical POM (Princeton Ocean Model) model of the Princeton University to simulate the tidal interaction between ocean waves and the approaching YanShui river. The present three-dimensional finite difference method is found to be quite suitable for simulating the detailed estuary flow behavior, consisting of frequent changes, in the river depth, the local velocity and the pressure gradients, and the salt and fresh water mixing. The two-way simulation process, dealing with calculations of the external mode (e.g., surface elevation and vertically averaged velocity calculations) and the internal mode (updating the flow variables with time and calculating the turbulence effect) saves a lot of computer operation time. On the other hand, the physical mixing/migration process, in the estuary region, of the fresh river water and the salt water from the ocean could be successfully simulated using the POM model. In the simulation process, while at places far away from the estuary region we directly use the tidal data of Hsu et al (2002), near the estuary region we use their interpolated values, as required for a finer grid system. As a direct application, in the present study we simulate the estuary formation with the YanShui river. The computation range contains both the river and the estuary sea area; and the present numerical model successfully takes care of all the associated physical changes in the region, such as, tide formation in the sea region, the discharge of river water to the tidal section of the estuary, and the tidal influence in the sea water level change and the salt water migration to the YanShui river.
| Identifer | oai:union.ndltd.org:TW/092NCKU5083016 |
| Date | January 2004 |
| Creators | Yi-Chun Lin, 林意淳 |
| Contributors | Tai-Wen Hsu, 許泰文 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 66 |
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