頁籤選單縮合
題 名 | 雲林沿海地下水主要含水層鹽化之監測=Monitoring of Groundwater Salinization in the Coastal Area of Yuenlin, Taiwan |
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作 者 | 陳文福; 郭繁元; 秦啟文; | 書刊名 | 經濟部中央地質調查所彙刊 |
卷 期 | 14 2001.09[民90.09] |
頁 次 | 頁103-121 |
分類號 | 351.85 |
關鍵詞 | 地下水鹽化; 雲林縣; 沿海地區; Groundwater salinization; Yuenlin County; Coastal area; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究以臺灣區地下水觀測網的分層觀測井,監測雲林沿海地區主要含水層(20-100 m)的地下水主成分,分析鹽化範圍及趨勢,並初步探討其原因。總溶解物(TDS)為主要離子:鈣、鎂、鉀、鈉、氯、硫酸根、碳酸氫根及其它微量元素組成,主成分的監測可以瞭解地下水的鹹淡,是否適合飲用或灌溉等用途。採樣法依照環境保護署公告之標準方法(NIEA W103.50 B),抽出三倍井體積之水後採樣,水樣以冰桶保存,48小時內依公告之標準方法化驗完畢。 本研究共有三次檢測資料,第一次資料引用中興大學環工系謝永旭教授(1991-1998年)之報告,該報告就每年新建井分年檢測,第二次(1999年)及第三次(2000年)為臺糖地下水中心所採樣及檢測。研究結果顯示含水層一之二(20-60 m)之9口監測井,其TDS已全部超過500 mg/l,其中4口超過1000 mg/l;較明顯的鹹化區域在金湖、海園及東光地區,鹹化原因並不相同,金湖地區可能為古海水遺留,海園及東光地區可能因更淺層鹹水滲漏污染。 含水層二之一(60-100 m)之20口監測井,其TDS超過500 mg/l 有5口,超過1000 mg/l 有2口;較明顯的鹹化區域在海園及宜梧地區,鹹化原因可能因淺層鹹水滲漏污染。 |
英文摘要 | This article provides groundwater salinization monitoring results in the coastal area of Yuenlin County, Taiwan. With the wells of the Taiwan groundwater monitoring Net projects used, the TDS (total dissolved solids) of major aquifers 20 to 100 m deep below land surface were monitored annually. All the wells were extensively developed after drilling and three well volumes of water were removed immediately prior to sampling with a bailer. Water quality parameters were determined including total dissolved solids (TDS), electrical conductivity (EC) and inorganic major components: Ca²[90a7], Mg²[90a7], K[90a7], Na[90a7], Cl¯, SO₄²¯, HCO₃¯. We compare our results for the years 1999-2000 with those of the previous study during 1992-1998 and map out the distribution of the salinization areas. The data for the year 2000 indicate that all nine wells in the shallow aquifer (20-60 m) TDS of groundwater exceed 500 mg/L, and four wells exceed 1000 mg/L. In the case of five of the twenty wells in the major aquifer (60-100 m), TDS exceed 500 mg/L, while two wells exceed 1000 mg/L. Our data show that the groundwater TDS concentration of major aquifers of the Yuenlin coastal area is continuously increasing and will threaten the local water resources. |
本系統中英文摘要資訊取自各篇刊載內容。