碩士 / 國立中山大學 / 海洋環境及工程學系研究所 / 91 / ABSTRACT
Most sandy beaches around the world have been under the threat of being eroded in the past six decades, resulting in shoreline retreat; thus, calling for various shoreline protection devices to be constructed to preserve the well-being of coastal habitants. To achieve this purpose, research on shoreline changes and development of numerical or mathematical models for predicting shoreline changes would help attain the goal of sustainable use of coastal land.
This thesis reports preliminary engineering applications of GENESIS that have become a popular tool for modeling long-term shoreline changes. The aim of this study is to predict the potential shoreline change in the light of different layouts of shoreline protection devices. The topics addressed in this report include the discussion on the parameters in GENESIS; shoreline changes in the lee and/or on the back of single groin and single detached breakwater with normal or oblique wave incidence; comparison on the efficiency of beach accretion as a function of gap width between structures and the sequence of their construction, as well as assessment on the restraint from the two different boundary conditions used in GENESIS. The results of modeling using GENESIS are then verified using the result based on the empirical parabolic bay shape equation and a physical scale model, in order to test the feasibility of applying GENESIS for practical engineering uses.
From the results of this study, it can be stated that GENESIS is valuable reference tool for engineering design, despite some shortcomings in setting up boundary conditions and the invariant nature of and values which do not respond to the process of changing shoreline curvature. However, the GENESIS system would have a positive contribution to the modeling of shoreline changes upon the construction of protective devices on a coast.
| Identifer | oai:union.ndltd.org:TW/091NSYS5282005 |
| Date | January 2003 |
| Creators | Tien-Wei Yang, 楊天瑋 |
| Contributors | John R.C. Hsu, 許榮中 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 97 |
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