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題名 | 垃圾掩埋場鄰近水體之水質監測與管理=Monitoring and Management of Water Surrounding Landfill Sites |
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作者 | 張祖恩; 張益國; 鄭志鴻; 蔡淑慧; Chang, Juu-en; Chang, Yi-kuo; Chen, Chih-hung; Tsai, Shu-hui; |
期刊 | 中國環境工程學刊 |
出版日期 | 19970900 |
卷期 | 7:3 1997.09[民86.09] |
頁次 | 頁263-270 |
分類號 | 445.545 |
語文 | chi |
關鍵詞 | 掩埋場; 不透水層; 監測井; 水質; Landfill site; Geomembrane; Monitoring well; Water quality; |
中文摘要 | 垃圾滲出水之收集與處理為垃圾掩埋場管理中極重要一環,因其含有高濃度的有 機物質、氨氮、無機鹽類及微量重金屬,一旦滲漏將對鄰近的地面及地下水體造成嚴重的 污染。本研究係針對臺灣南部某一垃圾掩埋場近十五年來所使用的新舊掩埋區,對其垃圾滲 出水、掩埋場鄰近之地面水 / 地下水質及地下水水位與流向進行為期三年的調查, 以檢討 新舊掩埋場的管理方式及掩埋場有無舖設不透水層對鄰近地面水及地下水水質之影響。由三 年的調查結果顯示, 在舊掩埋區 (未舖設不透水層 ) 下游的地下水已受到滲出水的污染, 但污染程度有逐年下降的趨勢; 在新掩埋區 (有舖設不透水層 ) 下游之地下水水質則變動 較小,可知不透水層的舖設對地下水的污染防治具有一定功效,但鄰近新掩埋區之地下水之 各項水質指標仍有較背景值為高的現象,此可能因掩埋場底部不透水層局部破裂所造成。在 地面水調查方面, 流經新 / 舊掩埋區的兩條小河川之水質指標皆有自上游到下游逐漸升高 的趨勢,流經舊掩區的河川水質概因受污染地下水外滲影響,而流經新掩埋區的河川水質則 因滲出水收集系統破損所致。由垃圾掩埋場鄰近水體水質監測結果,可知地下水流向的掌握 及地下水水質的監測可作為水質污染預警及污染改善之依據,但若僅在掩埋場地下水下游設 置一口監測,井將無法完全掌握受滲出水污染之範圍,有必要在掩埋場地下水坡降線下游設 置三口以上之水質監測井。 |
英文摘要 | Collection and treatment of leachate are extremely important issues in sanitary landfill management. Leachate usually contains high concentrations of pollutants which have adverse effects on the evnironment. Therefore, monitoring of groundwater is necessary to detect changes in water quality that may be caused by seepage of leachate. In this study, a series of investigations were conducted on the characteristics of landfill leachate and on the changes in surface water and groundwater surrounding unlined and lined landfills after closure for assessing the effect of leachate on water bodies surrounding landfill sites. According to the results of a three-year study, the groundwater flowing under the old, unlined landfill was seriously polluted by leachate but the pollution decreased with time. The pollution monitoring wells around the unlined landfill site showed high concentrations of EC, COD,NH -N,and Cl ��. These four pollutnts could be used as parameter indicators for groundwater monitoring of landfills. The surface water flowing through the old, unlined landfill was polluted also by lateral seepage of the leachate. The changes in down-gradient groundwater flowing through the geomembrane-lined landfill were insignificant, revealing that the liner is efficient in preventing the leakage of leachate. However, the surface water flowing through the lined landfill was polluted by the lateral leachate because of geomembrane damage. The investigation results also show that the one up-gradient and one down-gradient groundwater monitoring system was insufficient to detect the presence of leakage from the landfill site. One up-gradient and three down-gradient wells are necessary for an integral monitoring system. |
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