環保專案成果報告查詢系統

專案計畫編號	EPA-96-L101-02-204
經費年度	096
計畫經費	4,374 千元
專案開始日期	2007/06/08
專案結束日期	2007/12/31
專案主持人	潘時正
主辦單位	監資處
承辦人	游琇如
執行單位	中興工程顧問股份有限公司
專案分類	環境資訊系統
中文關鍵字	區域性,地下水,監測井
英文關鍵字	Regional ,Groundwater, Monitoring Well
協同主持人
共同主持人
計畫聯絡人	吳建輝
計畫聯絡電話	02-27698388#20889
計畫聯絡信箱	wch@mail.sinotech.com.tw

中文摘要	本（96）年計畫主要以環保署分別於93年度辦理之「區域性地下水水質監測井網檢討計畫」及94~95年辦理之「區域性地下水井維護及資料更新計畫」經驗為基礎，擴大區域性監測井評估與維護之範圍，並實施監測井基本資料校正更新，以確保區域性地下水水質監測井之正常功能，進而達成水質污染預防之施政目標。依工作計畫契約書之規定，本（96）年計畫工作包括：「定期維護區域性地下水監測井，維持監測井況正常」、「健全區域性地下水監測井網環境資料，驗證地下水井基本資料」等二大項目。針對各項工作成果說明如下：（一）定期維護區域性地下水監測井，維持監測井況正常：前案計畫（93~95年度計畫）中已針對431口區域性地下水水質監測井，篩選出179口井況較差之監測井施作井下攝影及微水試驗，並於其中篩選出需執行完井作業之監測井100口，扣除已完井及環保署已另案重設新井，尚餘15 口未施作完井工作，故本（96）年由前案計畫中尚未實施井況評估之252口中，依五項篩選原則篩選出68口井進行井況評估，分別進行井下攝影及微水試驗，結果顯示功能正常有27口，建議需重設或暫停監測有1口，建議優先完井名單40口。此外，前案計畫尚未進行完井的監測井中，篩選出8口加上本（96）年度建議優先完井有40口，合計48口分別於96.09.27~96.11.02進行完井工作，並於完井前、後施作微水試驗，另於完井後進行井下攝影評估其成效。再次完井主要工作包括刷洗、氣提抽水、超量抽水等，結果顯示完井後大部份監測井井管與井篩積垢、水中生物膜懸浮可大量清除，且井管與井篩皆清晰可見。部份監測井因回水不良，經刷洗抽乾後，仍有微量懸浮、局部積垢或井底少量沉積等，惟並不影響監測井之正常功能。由井下攝影結果顯示，井況不良以井壁及井篩積垢或附著生物膜現象最普遍；於完成完井作業之48口監測井中，共計有苗栗縣竹南國小等28口於完井後，透水性屬正常或良好者；另20口完井後監測井的回水狀況並無明顯增加，依其設置的紀錄資料地質組成顯示，上述20口中共計有7口井篩開篩位置恰位於透水性差之黏土或坋土層，故研判回水緩慢的原因，應與監測井附近地質條件有關；此外有8口監測井並無地質組成資料且回水緩慢，另5口（彰化縣文開國小等）監測井為中細砂，其有可能為監測井紀錄資料有誤，或受其他不確定因素影響，建議可進一步施作土壤連續取樣，以判視地質分層狀況。（二）健全區域性地下水監測井網環境資料，驗證地下水井基本資料：本（96）年配合井況評估工作，篩選出68口監測井執行高程驗證工作。依高程驗証結果顯示，部份監測井井頂實際高程與紀錄高程有-57.255M〜20.347M之明顯差距。此外，配合井下攝影進行之68口井篩驗證結果顯示，約有37%井篩長度與開設位置與資料卡紀錄不符，前述結果均已更新基本資料卡。關於井篩位置驗證方面，依據歷年水位及井下攝影之井篩位置加以分析，可知68口監測井中，有15口井歷年水位皆位於井篩區間內，有18口井歷年水位在井篩上段震盪，而有35口井歷年水位較井篩位置高。
中文關鍵字	區域性,地下水,監測井

中文摘要

本（96）年計畫主要以環保署分別於93年度辦理之「區域性地下水水質監測井網檢討計畫」及94~95年辦理之「區域性地下水井維護及資料更新計畫」經驗為基礎，擴大區域性監測井評估與維護之範圍，並實施監測井基本資料校正更新，以確保區域性地下水水質監測井之正常功能，進而達成水質污染預防之施政目標。依工作計畫契約書之規定，本（96）年計畫工作包括：「定期維護區域性地下水監測井，維持監測井況正常」、「健全區域性地下水監測井網環境資料，驗證地下水井基本資料」等二大項目。針對各項工作成果說明如下：（一）定期維護區域性地下水監測井，維持監測井況正常：前案計畫（93~95年度計畫）中已針對431口區域性地下水水質監測井，篩選出179口井況較差之監測井施作井下攝影及微水試驗，並於其中篩選出需執行完井作業之監測井100口，扣除已完井及環保署已另案重設新井，尚餘15 口未施作完井工作，故本（96）年由前案計畫中尚未實施井況評估之252口中，依五項篩選原則篩選出68口井進行井況評估，分別進行井下攝影及微水試驗，結果顯示功能正常有27口，建議需重設或暫停監測有1口，建議優先完井名單40口。此外，前案計畫尚未進行完井的監測井中，篩選出8口加上本（96）年度建議優先完井有40口，合計48口分別於96.09.27~96.11.02進行完井工作，並於完井前、後施作微水試驗，另於完井後進行井下攝影評估其成效。再次完井主要工作包括刷洗、氣提抽水、超量抽水等，結果顯示完井後大部份監測井井管與井篩積垢、水中生物膜懸浮可大量清除，且井管與井篩皆清晰可見。部份監測井因回水不良，經刷洗抽乾後，仍有微量懸浮、局部積垢或井底少量沉積等，惟並不影響監測井之正常功能。由井下攝影結果顯示，井況不良以井壁及井篩積垢或附著生物膜現象最普遍；於完成完井作業之48口監測井中，共計有苗栗縣竹南國小等28口於完井後，透水性屬正常或良好者；另20口完井後監測井的回水狀況並無明顯增加，依其設置的紀錄資料地質組成顯示，上述20口中共計有7口井篩開篩位置恰位於透水性差之黏土或坋土層，故研判回水緩慢的原因，應與監測井附近地質條件有關；此外有8口監測井並無地質組成資料且回水緩慢，另5口（彰化縣文開國小等）監測井為中細砂，其有可能為監測井紀錄資料有誤，或受其他不確定因素影響，建議可進一步施作土壤連續取樣，以判視地質分層狀況。（二）健全區域性地下水監測井網環境資料，驗證地下水井基本資料：本（96）年配合井況評估工作，篩選出68口監測井執行高程驗證工作。依高程驗証結果顯示，部份監測井井頂實際高程與紀錄高程有-57.255M〜20.347M之明顯差距。此外，配合井下攝影進行之68口井篩驗證結果顯示，約有37%井篩長度與開設位置與資料卡紀錄不符，前述結果均已更新基本資料卡。關於井篩位置驗證方面，依據歷年水位及井下攝影之井篩位置加以分析，可知68口監測井中，有15口井歷年水位皆位於井篩區間內，有18口井歷年水位在井篩上段震盪，而有35口井歷年水位較井篩位置高。

中文關鍵字

區域性,地下水,監測井

類型	檔名	檔案大小	說明	最新版公開日期
期末報告	96年監測井期末報告(全).pdf	112MB	[期末報告]公開完整版	2008/3/1 上午 12:00:00

摘要	This project is based on the experience of the previous projects including “Evaluation Project of the Network of the Regional Groundwater Monitoring Wells (RGMWs)” and “Project of Maintenance and Information Correction of the Regional Groundwater Monitoring Wells” which executed in year 2004 and 2006 respectively. The objective of this project is to secure the function of the RGMWs through the extension of the well maintenance work and the correction of the basic well information, thus the RGMWs can provide pollution precaution and help to protect groundwater body. According to the contract, the tasks of this project include (1) providing periodical cleaning to the RGMWs; (2) the verification and correction of the basic well information. The project results of the above two major tasks are described as below: 11. Providing periodical cleaning to the RGMWs In the previous projects, totally 179 wells were selected from overall 431 RGMWs and evaluated within down-hole video inspection and slug test. In the evaluated 179 wells, totally 100 wells were recommended to receive well cleaning and 15 of the 100 wells have been cleaned during year 2004 and 2006. In this project, totally 68 wells has been selected and evaluated from the 252 wells which were not evaluated in the previous projects. According to the results of down-hole video inspection and slug test, the tested wells can be classified into following four categories: (1) the function is normal (27 wells); (2) needs instant well cleaning and maintenance (40 wells); (3) recommends for well reinstallation or ceases groundwater monitoring (1 wells). In addition to the 40 wells recommended for instant cleaning, additional 8 wells were selected and cleaned from the remaining 15 wells which were not cleaned in the previous projects. Thus the total quantity of cleaned wells in this project achieves 48 wells and has been executed between 9/27/2007 and 11/2/2007. According to the work plan proposed previously, the down-hole video inspection and slug test were applied to each well before and after the well cleaning. According to the results of down-hole video inspection before well cleaning, scaling and biological fouling on well casing and screen prevails in most RGMWs. After well cleaning, the hydraulic conductivities of 28 wells among the 48 cleaned wells, including Zhu-Nan Elementary School, Miao-Li, et al., have recovered or maintained in good condition. At contrast, the hydraulic conductivities of other 20 wells remain in poor condition and the primary reason is due to the geological conditions of the aquifer (7 wells), including silt or clay properties. In addition, the geological records of 8 well among the 20 wells is missing and the geological conditions of 5 well (Wen-Kai Elementary School, Zhang-Hua, et al.) is not consistent to the hydraulic conductivity. The aquifer geological conditions of this well is recommended to be investigated again in the future. 22. Verification and correction of the basic well information In this project, the altitude and the screen depth and length of the selected 68 wells was examined. Generally, the altitude recorded in the basic well information showed significant error (-57.255m ~ +20.347m) and all were corrected. On the other hand, the screen depth and length of 37% examined wells showed errors in the basic well information and were correct accordingly.
英文關鍵字	Regional ,Groundwater, Monitoring Well

摘要

This project is based on the experience of the previous projects including “Evaluation Project of the Network of the Regional Groundwater Monitoring Wells (RGMWs)” and “Project of Maintenance and Information Correction of the Regional Groundwater Monitoring Wells” which executed in year 2004 and 2006 respectively. The objective of this project is to secure the function of the RGMWs through the extension of the well maintenance work and the correction of the basic well information, thus the RGMWs can provide pollution precaution and help to protect groundwater body. According to the contract, the tasks of this project include (1) providing periodical cleaning to the RGMWs; (2) the verification and correction of the basic well information. The project results of the above two major tasks are described as below: 11. Providing periodical cleaning to the RGMWs In the previous projects, totally 179 wells were selected from overall 431 RGMWs and evaluated within down-hole video inspection and slug test. In the evaluated 179 wells, totally 100 wells were recommended to receive well cleaning and 15 of the 100 wells have been cleaned during year 2004 and 2006. In this project, totally 68 wells has been selected and evaluated from the 252 wells which were not evaluated in the previous projects. According to the results of down-hole video inspection and slug test, the tested wells can be classified into following four categories: (1) the function is normal (27 wells); (2) needs instant well cleaning and maintenance (40 wells); (3) recommends for well reinstallation or ceases groundwater monitoring (1 wells). In addition to the 40 wells recommended for instant cleaning, additional 8 wells were selected and cleaned from the remaining 15 wells which were not cleaned in the previous projects. Thus the total quantity of cleaned wells in this project achieves 48 wells and has been executed between 9/27/2007 and 11/2/2007. According to the work plan proposed previously, the down-hole video inspection and slug test were applied to each well before and after the well cleaning. According to the results of down-hole video inspection before well cleaning, scaling and biological fouling on well casing and screen prevails in most RGMWs. After well cleaning, the hydraulic conductivities of 28 wells among the 48 cleaned wells, including Zhu-Nan Elementary School, Miao-Li, et al., have recovered or maintained in good condition. At contrast, the hydraulic conductivities of other 20 wells remain in poor condition and the primary reason is due to the geological conditions of the aquifer (7 wells), including silt or clay properties. In addition, the geological records of 8 well among the 20 wells is missing and the geological conditions of 5 well (Wen-Kai Elementary School, Zhang-Hua, et al.) is not consistent to the hydraulic conductivity. The aquifer geological conditions of this well is recommended to be investigated again in the future. 22. Verification and correction of the basic well information In this project, the altitude and the screen depth and length of the selected 68 wells was examined. Generally, the altitude recorded in the basic well information showed significant error (-57.255m ~ +20.347m) and all were corrected. On the other hand, the screen depth and length of 37% examined wells showed errors in the basic well information and were correct accordingly.

英文關鍵字

Regional ,Groundwater, Monitoring Well