頁籤選單縮合
題名 | 雲林沿海地區地下水鹽化問題之探討=Analysis of Aquifer Salinization in the Coastal Area of Yun-Lin |
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作者 | 陳享宗; 劉振宇; | 書刊名 | 農業工程學報 |
卷期 | 44:1 1998.03[民87.03] |
頁次 | 頁25-33 |
分類號 | 443.67 |
關鍵詞 | 地下水鹽化; 沿海地區; 雲林; Aquifer salinization; Coastal area; Yun-Lin; |
語文 | 中文(Chinese) |
中文摘要 | 本研究探討雲林沿海地區淺層含水層受鹽化之原因,首先藉由地質鑽探資料及近 海海底地形分佈判斷沿海水文地質結構,然後分析海水入侵、井管入滲及鹹水魚塭入滲三種 鹽化可能,選擇氯離子濃度作為水質鹽化之指標。 研究方法包括應用移流 - 延散方程式計 算海水入侵之氯離子濃度及利用入滲之水體體積推求井管入滲、鹹水魚塭入滲造成水體氯離 子含量之增加。研究結果顯示,雲林沿海一帶淺層含水層和海水可能連通,於近海地區大量 抽水會引起海水入侵,目前雲林沿海口湖地區淺層地下水質鹽化現象,其中海水入侵所造成 的比例約 26.7%,井管入滲約 0.7%,鹹水魚塭入滲約 72.6%, 故鹹水魚塭入滲為目前雲林 沿海地區淺層含水層鹽化的主要原因。 |
英文摘要 | The objective of the study is to analyze the possible causes of the salinization of the shallow ground water in the coastal area of Yun-Lin. By using the geological drilling data and sea floor topographic distribution, the local hydrogeological setting is first constructed. Three possible causes including sea water intrusion, salt water percolation through wells and infiltration of salty water from fishfarm are then investigated. The chloride concentration is selected as an index of ground water salinization. The sea water intrusion is modeled by the advection-dispersion equation, salt water infiltration from wells and fishfarm are calculated by the amount of water percolated. From constructed local hydrogeological setting it suggested that the shallow aquifer may be interconnected to the sea water and will caused salt water intrusion if large amount groundwater is over pumped. The percentage of shallow aquifer at Kou Hu in Yun-Lin coastal area caused by sea water intrusion, well percolation and fishfarm infiltration are 26.7, 0.7 and 72.6%, respectively. The result suggest the vertical infiltration of salt water from fishfarm is the major cause of the shallow ground water salinization in the coastal area of Yun-Lin. |
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