雲林沿海地區地下水水質分析

本文主要針對雲林沿海地區進行地下水背景水質分析研究。研究期限由八十一年至八十四年共四年，每年分四季採樣分析28口監測井地下水水質，其中包括21口淺層監測井及7口中、深層監測井。研究結果顯示淺層地下水井之電導度、總溶解性固體量、氯及鈉離子等海水汚染指標以及硫酸鹽、游離氨氮濃度大部份超過各項水質標準，尤其是口湖、臺西及麥寮等地。而中、深層地下水尙未受到海水入侵之汚染，但在地盤下陷最嚴重之口湖鄉中、深層地下水已有些微鹽化現象，推測爲古海相地層鹽份受到有效應力增加影響而溶出。四年監測期間，該區地下水水質穩定並無惡化趨勢。

關鍵字

地下水水質；雲林；海水入侵

並列摘要

This object of this study is to evaluate and construct the ground water quality in the coastal area of Yun-Lin. The study is carried out for 4 years. 21 shallow monitor wells and 7 middle & deep monitor wells were used for sampling seasonly each year. Results show that the electrical conductivity (EC), total dissolvable solid (TDS), chloride (CI) and sodium (Na) of shallow aquifer exceed the water quality standard and the middle & deep aquifer shows little pollution except in Ou-Hur. The high salinity of deep aquifer in Ou-Hur is due to the brine dissolved from ancient marine stratified formation. The groundwater quality maintains steady during the four year monitoring period.

並列關鍵字

Groundwater quality ； Yun-Lin ； Seawater intrusion

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