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環境生態指標之應用-以北港溪為例

Application of Environmental Indicators to Improve Bei-Gang River Environment in Taiwan

摘要


環境指標在河川環境相關管理上扮演重要的角色,其可幫助描述生態系統的變化與趨勢,並在某種空間與時間尺度下,診斷環境劣化問題的原因。為了客觀評估環境狀況,本研究綜合應用不同層級的生物指標與環境狀況指標,提出適用於台灣的河川環境狀況分析方法,並以烏溪上游北港溪為例,以瞭解河川環境劣化原因並進一步提出改善河川環境的建議。根據生態調查與指標呈現成果,北港溪研究河段中造成縱向連續性阻絕的結構物大旗堰應以建立魚道的方式做為復育手段。本研究說明此環境指標為一可用工具,可作為台灣河川環境改善復育工作的有效輔助。

關鍵字

環境指標 河川復育 棲地

並列摘要


Ecological indicators play an important management role by helping characterize status and trends in ecological systems and diagnose causes of declining condition across a range of spatial and temporal scales. To better assess rivers and streams in Taiwan and encourage the nationwide applicability of a suite of environmental indicators, Bei-Gang River was chosen as a case study to determine how the environment of Bei-Gang River was degrading and how to possibly improve the river condition. The results of ecological survey and application of indicators indicated that the longitudinal connectivity could be improved by fishway passage construction. This study demonstrates a useful tool to give direction to mitigation efforts for improving river environment of future applications in Taiwan.

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