以判別分析方法探討大鵬灣海域水質受鄰近河川污染之影響

海洋環境資源的保育是近十年來全世界非常重視的課題，尤其是在水體水質污染部份。而國內對於近岸污染防治，都是頭痛醫頭的管未處理方式。本研究則以大鵬灣海域為主體，除內部確定污染源外，期藉由數理統計方式，確定潟湖外鄰近河川對其污染之影響。透過潟湖內外雙管齊下，作好污染整治工作，如此方能確保有好的水體及休憩環境。經由典型判別分析的結果，在所建立的二個線性判別函數裏，所含的判別變數均有顯著性的貢獻。此兩判別函數以因子結構係數來說明主要為總氮、藻數、溶氧及總磷，俱說明是「營養鹽影響因子」，判別能力分別是95.6%、4.4%。同時歸類出大鵬灣海域水質受高屏溪影響最深遠。因環境地形關係，本海域在蚵架及箱網養殖拆遷後水質雖㈲改善，但囊袋未端處仍有優養化之慮。建議改善之道：在潟湖外，加強河川污染源整治稽查；在潟湖內，考慮另作一洋流交換之出入口，以加強洋流的交換。此判別分析結果對於大鵬灣潟湖及其它相同性質之棲境在水資源之經營管理上，將可提供莫大助益。

關鍵字

判別分析；大鵬灣潟湖；水質污染

並列摘要

The preservation of marine resources become a hot issue in all the world during the last decade, especially in water pollution. For coastal prevention and control of pollution in Taiwan, the ultimate process is the best way to solve problems. This work we conducted to identify the source of pollution in neighbouring rivers outside Tapeng Lagoon by canonical discriminant analysis, and besides, intake pollution sources can be confirmed. By way of working along both lines in pollution prevention is the best way to have a beautiful place to rest. According to two constructed discriminant functions, it had significantly contribution in all discriminant variables, and explained the affected factor were total nitrogen, algae, dissolved oxygen and total phosphate, and was termed the nutrient affect factor. The capability of recognition is 95.6% and 4.4%, respectively. The Kao-Ping River was identified as the most important contributor to the water quality of Tapeng Lagoon. The water quality gets better after the removal of the oyster frames and fishery boxes aquaculture. But on the basis of environmental topography characteristic reason, to strengthen stream pollution prevention inlake and to make another entrance and exit way through ocean are the best way to raise the water quality in Tapeng Lagoon especially for eutrophication. These methodologies and results can provide useful information concerning habitat recovery and water resource management.

並列關鍵字

Canonical discriminant analysis ； Tapeng Lagoon ； water pollution

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以判別分析方法探討大鵬灣海域水質受鄰近河川污染之影響

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