https://scholars.lib.ntu.edu.tw/handle/123456789/167649
標題: | Investigations of Vegetation changes and Corresponding Hydraulic Characteristics of Guandu Wetlands | 作者: | Shih, Shang-Shu Lee, Hong-Yuan |
公開日期: | 九月-2004 | 起(迄)頁: | - | 來源出版物: | 5th Ecohydraulics conference | 摘要: | The aerial photos from 1978 to 1994 were used to analyze the temporal variations of the vegetation changes of the Guandu Nature Reserve that the marsh habitat, dominated by Cyperus and Phragmites, has changed into a swamp habitat, dominated by Kandelia. The variations of the water surface elevation (w.s.e.) due to increase of coverage area of Kandelia were also obtained in this study. The mangrove spreads cause a significant impact upon ecosystem and flood control operations. When considering the factors of flood protection and sediment deposition of wetland, the optimal mangrove-removal ratio is between 10% and 20%. A horizontal two-dimensional model, TABS-2, was applied in this study to simulate the hydraulic and sediment transport characteristics of this estuarine wetland. Four cases with different mangrove-removal rates were investigated. It is found that the w.s.e. decreases as the mangrove-removal ratio increases. When the mangrove-removal ratio of Kandelia reaches 20%, the variations of the decrease of w.s.e. of the wetland became insignificant. The optimal mangrove-removal ratio is between 10% and 20% when considering the factors of flood protection. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/64181 |
顯示於: | 土木工程學系 |
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Investigations of Vegetation changes and Corresponding Hydraulic Characteristics of Guandu Wetlands.pdf | 337.9 kB | Adobe PDF | 檢視/開啟 |
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