100至101年環境水質南區監測計畫(100年度)
| 中文摘要 | 本計畫主要針對南區7縣市各類水體水質監測，掌握各水體水質時間變化趨勢，並進行各水體污染評估分析，以提供環保單位污染防治決策之參考。 河川水質計有32條河川主支流，109個監測站，於每月監測一次，今年度監測結果顯示，以曾文溪流域及屏東縣境內河川水質狀況最佳，而將軍溪、二仁溪及阿公店溪流域屬嚴重污染等級佔較高比例。100年1月至6月皆無明顯降雨屬枯水期，河水乾涸，河川污染物濃度偏高，造成嚴重污染比例偏高，7月至10月則因降雨沖刷，懸浮固體偏高，以致未(稍)受污染程度偏低，中度污染程度超過50%。整體而言，今年度河川水水質以中度污染(41.0%)等級佔最高比例，未(稍)受污染等級(31.1%)次之，整體而言水質狀況與歷年差異不大。 海域水質計有8個沿海區域，42個監測站，於每季監測一次，各季沿岸測站受河口淡水匯入影響，無機鹽類(磷酸鹽、矽酸鹽、硝酸鹽氮)濃度較高，除二仁溪口、東港溪出海口之溶氧量及東港溪出海口之氨氮等項測值外，其餘各季各測站測值均符合其所屬類別之海域海洋環境品質標準。第三季(100年8月)、第四季(100年10月)監測期間受到採樣前鋒面過境降雨量增加之影響，鹽度、無機鹽類與歷年略有差異。 海灘水質計有10個休憩海域，30個監測站，於6月底至8月底每週監測一次，各梯次水質除7月17日、7月31日期間受降雨沖刷影響，水質呈現普通等級外，其餘各梯次普遍均為優良等級。 水庫水質計有17個水庫，45個監測站，於每季監測一次，各水庫均有部份測點不符合甲類陸域地面水體水質標準，南區水庫以蘭潭水庫水質最佳，全年屬貧養等級比例佔75%，其次為仁義潭水庫、烏山頭水庫及牡丹潭水庫，全年屬貧養等級比例佔25%，普養等級佔75%，以鳳山水庫及澎湖水庫水質最差，全年屬優養等級比例佔100%。 地下水水質計有7縣市，202個監測井，各縣市超過監測標準之比率介於0%～89.5%，其中超過地下水第二類監測標準之項目與歷年結果相近，主要以氨氮、鐵及錳為主。各監測井之水質，以Stiff水質形狀圖、Piper圖解方式評估，以HCO3－+CO32－及Ca2＋凸出型及I區佔最高比例，均約為60%，與近2年評析結果大致呈現一致趨勢。 | ||
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| 中文關鍵字 | 水質監測;水質標準;方法偵測極限 | ||
基本資訊
| 專案計畫編號 | EPA-100-L101-02-203 | 經費年度 | 100 | 計畫經費 | 32500 千元 |
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| 專案開始日期 | 2011/01/07 | 專案結束日期 | 2011/12/31 | 專案主持人 | 蔡俊銘 |
| 主辦單位 | 監資處 | 承辦人 | 呂澄洋 | 執行單位 | 中環科技事業股份有限公司 |
成果下載
| 類型 | 檔名 | 檔案大小 | 說明 |
|---|---|---|---|
| 期末報告 | EPA-100-L101-02-203(100年度).pdf | 99MB |
The Environment Monitoring of the Water Quality in the Southern Area of Taiwan from 2011 to 2012
| 英文摘要 | The main objective of this project is to monitor the water quality of seven cities and counties in the southern part of Taiwan in order to track the seasonal variability in water quality and to analyze and assess the degree of pollution of various bodies of water. The results of this investigation can provide grounds for policy making to environmental protection authorities. One hundred and nine sampling sites covering 32 rivers, including main streams and tributaries, were monitored monthly for river water quality. The results indicated that the water quality of Zeng-Wen River basin and rivers within Pingdong county were the best, while Jiang-Jun River, Er-Ren River and A-Gong-Dian River basins were found to have relatively high levels of pollution. There was a major drought this year; in particular, the lack of rainfall from January to June made parts of some rivers nearly run dry, so test results for most pollutants were high; thus, the percentage of serious pollution looked high. Due to plenty of rainfall from July through October, the suspended solids in the rivers tended to be high; thus the percentage of unpolluted rivers was low and over 50% of the results indicated that rivers were intermediately polluted. As a whole, the water quality of the intermediately polluted rivers accounted for 41.0%, which constituted the highest proportion of the rivers investigated, and non- or slightly polluted rivers accounted for 31.1%. Overall, no major difference in water quality was observed when compared to the historical data. Forty-two sampling sites covering eight coastal areas were monitored quarterly for ocean water quality. Since the river affected the estuary areas during high tide, the concentrations of phosphate, nitrate and silicate were high. The results indicated that most analytes met the quality criteria for each individually specified ocean water category except the results of dissolved oxygen and ammonia nitrogen at estuary areas of Er-Ren River and Dong-Gang River. Because of rainfall which came just before the sampling period in the 3rd and 4th quarters, some indexes, including salinity, phosphate, nitrate and silicate, were different from past results. Thirty sampling sites covering ten beaches were monitored weekly from the end of June through August. The results indicated that the water qualities were all excellent. Due to much rainfall on July 17 and 31, the results of these two weeks were fair. Forty-five sampling sites covering 17 water reservoirs were monitored quarterly. All reservoirs were found to contain certain sampling sites that did not meet the Class A surface water quality criteria. The results indicated that Lan-Tan Reservoir had the best water quality, which was oligotrophic for three of the four quarters. Ren-Yi-Tan Reservoir, Wu-Shan-Tou Reservoir and Mu-Dan Reservoir were found to be oligotrophic in one quarter and mesotrophic in the other three quarters. Feng-Shan Reservoir was found to have the worst water quality which was eutrophic in all four quarters. Ammonia nitrogen, iron, and manganese were the major analytes with results that reached the regulatory monitoring criteria in 202 groundwater monitoring wells for the seven cities and counties being monitored quarterly. The failing rates were between 0% to 89.5% for different cities and counties. No significant difference was found when compared to the historical data. The graphical analysis of the monitored locations by Stiff-plotting and Piper-plotting showed that about 60% of the wells are HCO3－+CO32－- Ca2＋ type and fall into area I. The trend is the same as evaluated over the last two years. | ||
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| 英文關鍵字 | Water Quality Monitoring;Water Quality Standards;Method Detection Limit | ||