碩士 / 崑山科技大學 / 環境工程研究所 / 100 / This study assessed the influences and impacts on mangrove development due to land subsidence both in Jishui estuary and the lowreach of Pujsu river. By means of four aerial images of 1983, 1989, 1991, and 2002 years and one Google map of 2007 year, the mangrove areas were evaluated among different years. The results shows that the mangrove areas changed with 48.53, 25.26, 34.35, and 17.49 ha related to 1983, 1989, 2002, and 2007 years respectively around the Jishui estuary. The average heights of mangrove varied with 302.9, 278.3, and 236.8 cm (N1- N 3= 15) from Jishui estuary to the upreach of Wuwang Bridge. Besides, the tree age was evaluated to 23.4± 3.6 years old and tree diameter increased 4.2± 0.4 mm per year (N= 10) in Jishui estuary. At the same time, the tree age was estimated 22.3± 7.5 years old and tree diameter increased 5± 0.9 mm per year (N= 10) in Toukang drainage. Two habitats given above are identified without significant difference in growth rate. The mangrove areas were calculated 8.29, 2.78, 10.00 and 13.44 ha for 1983, 1991, 2002, and 2007 years respectively in the lowreach of Pujsu river. The mangrove was long submerged by seawater and could not survive at the lowreach of Toushunan Bridge in Pujsu river, and it showed mud habitate without vegetable. Both of two habitate conditions for mangrove around Jishui and Pujsu estuary degraded due to land subsidence and restoration project must be proposed.
| Identifer | oai:union.ndltd.org:TW/100KSUT5515011 |
| Date | January 2012 |
| Creators | Shu-Hui Chang, 張淑蕙 |
| Contributors | Yih-Tsong Ueng, 翁義聰 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 39 |
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