圖書典藏及影音數位平台

阿公店水庫更新工程於民國95年7月1日起正式邁入營運管理階段，為對水庫營運期間環境品質有所掌握，乃延續對本水庫進行監測工作，俾利當影響超出環境涵容能力時，能適時採取減輕對策，以降低其負面影響，並期藉由施工階段及營運階段之持續性監測，建立本地區長期之環境資料庫，作為環境管理與維護依據。 本計畫依據「阿公店水庫更新改善計畫環境說明書」審查意見，辦理之營運期間環境監測作業，自95年7月至99年4月已完成第1階段環境監測作業；100~102年度及103年度乃依行政院環保署「阿公店水庫更新改善計畫環境監測計畫變更內容對照表」專案小組第2次審查會議決議，持續辦理原營運階段環境監測作業。 本年度（103年1月~12月）所執行之環境監測項目為地面水質（含水庫水質）、飲用水水源水質監測及生態調查等共3大項目。以下茲就本年度各項環境監測成果摘要敘述如下： 一、地面水質（含水庫水質）監測 本計畫地面水質（含水庫水質）監測分別位於旗山溪（月眉橋）、阿公店水庫（灌溉管口）、阿公店水庫（濁水溪匯流處）及阿公店溪（阿公店橋）等4處監測站。本年度監測數值中，除旗山溪（月眉橋）於第3季之溶氧未達到乙類水體標準、第2、3、4季之懸浮固體、第2、4季之大腸桿菌群及總磷皆超出乙類水體標準；阿公店水庫（灌溉管口）於第3季之溶氧未達到乙類水體標準、第1、3季之生化需氧量、第3季之懸浮固體皆超出乙類水體標準；阿公店水庫（濁水溪匯流處）於第3季之溶氧未達到乙類水體標準、第1季之生化需氧量、第3季之懸浮固體及總磷皆超出乙類水體標準；阿公店溪（阿公店橋）於第1季之鉻超出丁類水體標準外，其餘各測站各季之測值皆符合陸域地面水體水質標準。 本年度旗山溪（月眉橋）、阿公店水庫（灌溉管口）及阿公店水庫（濁水溪匯流處）均屬未（稍）受污染至中度污染，阿公店溪（阿公店橋）則屬中度污染至嚴重污染。由歷季各測站RPI值來看，旗山溪月眉橋未（稍）受污染比例佔53%，輕度污染比例佔9%，中度污染比例佔38%，顯示此處水質狀況良好；阿公店水庫（灌溉管口）未（稍）受污染比例佔50%，輕度污染比例佔21%，中度污染比例佔29%；阿公店水庫（濁水溪匯流處）未（稍）受污染比例佔62%，輕度污染比例佔19%，中度污染比例佔19%；阿公店溪（阿公店橋）則多介於中度污染至嚴重污染之間，其乃因阿公店溪（阿公店橋）附近長期受金屬與電鍍工業、畜牧廢水及家庭污水污染，導致水質狀況不佳。 就水質品質指標（WQI）進行比較分析，旗山溪（月眉橋）及阿公店水庫（灌溉管口）自95年第3季至103年第4季止。水體分類皆介於中下至優良之間，阿公店水庫（濁水溪匯流處）水體分類介於中等至優良之間，而阿公店溪（阿公店橋）水體分類介於惡劣至中等之間，與各測站RPI值相互比對，阿公店溪（阿公店橋）目前水質仍屬受污染之水體。 二、飲用水水源水質 飲用水水源水質監測地點為阿公店水庫（灌溉管口）及阿公店水庫（濁水溪匯流處）。本年度監測數值中，除阿公店水庫（灌溉管口）於第1、2、3、4季之濁度、第3、4季之色度、第3季之臭度、第2、3季鐵及第3季錳；阿公店水庫（濁水溪匯流處）於第1、2、3、4季之濁度、第3、4季之色度、第4季之臭度、第3季總溶解固體量、第2、3季鐵及第3季錳超出飲用水水源水質標準外，其餘各測站各測值皆符合飲用水水源水質標準。庫區濁度、總溶解固體量、臭度、鐵及錳測值超標，研判因水庫區屬泥岩地質，其顆粒細小於水中不易沉降，如遇降雨庫區水體更易受擾動，導致懸浮固體明顯增多。由於水中含有較高之懸浮固體、鐵及錳濃度，導致色度測值亦偏高；臭度超標研判可能受到庫區具土霉味之藻臭物質(geosmin及2-MIB)升高有關。 三、生態調查 生態調查項目包括陸域生態及水域生態兩部份，綜觀95年第3季至本年度之生態監測結果，各物種均呈現季節性上下波動，未有明顯下降趨勢，顯示各採樣點之生態環境未受到營運之影響而下降，而由水陸域之指標物種觀察，歷年之生態調查項目均無異常，並有穩定成長之趨勢。

The “Agongdian Reservoir Renovation & Improvement Project” has been in operation since July 1, 2006. The purpose of this project was to continue monitoring environmental quality during the operation stage of the reservoir, so that mitigation measures could be conducted in a timely manner to reduce negative effects when the influence has surpassed the environmental loading capacity. It was anticipated that continuous monitoring data of environmental quality during construction and operation can be used to establish a long term environmental database of environmental management and protection. According to the review comments of the Environmental Impact Statement for “Agongdian Reservoir Renovation and Improvement Project”, the environmental monitoring tasks have been continued during the operation period. The 1st stage environmental monitoring had been conducted during the period from July, 2006 to April, 2010. According to the conclusion of the 2nd censorship meeting for “Agongdian Reservoir Renovation and Improvement Project - Checking list of Modified Content of Environmental Monitoring Project” in 2011, 2012, 2013 and 2014, the environmental monitoring tasks during operation should keep going. This report assessed the monitoring results for 2014 from January to December. The monitoring aspects include reservoir water quality, drinking water quality and ecological survey. The results in this quarter are briefly described as below. 1. Surface water quality(Reservoir water quality) monitoring There are four surface water(reservoir water) monitoring stations located at Yuemei Bridge, Agongdian Reservoir(irrigation pipe inlet), Agongdian Reservoir(inflow of Zhuo-shui Creek) and Agongdian Bridge. In this year, Concentrations of DO(dissolved oxygen) in the third quarter is below the standard level and SS(suspended solids) in the second to four quarter, E. coli(Escherichia coli) in the second and four quarter, TP(total phosphorous) in the second and four quarter for Yuemei Bridge are above the standard levels. The concentrations of DO in the third quarter is below the standard level and BOD(biological oxygen demand) in the first and third quarter, SS in the third quarter for Agongdian Reservoir(irrigation pipe inlet) are above the standard levels. The concentrations of DO in the third quarter is below the standard level and BOD in the first quarter, SS in the third quarter and TP in the third quarter for Agongdian Reservoir(inflow of Zhuo-shui Creek) are above the standard levels. The concentrations of Cr(chromium) in the first quarter for Agongdian Bridge are above the standard level too. Nevertheless, all other measurements meet the surface water quality standards. According to the RPI(River Pollution Index) and the WQI(Water Quality Index), most water quality at the Yuemei Bridge and Agongdian Reservoir(irrigation pipe inlet and inflow of Zhuo-shui Creek) are classified as non-polluted to medium-polluted. Therefore, the water qualities are classified as between medium to good. Most water quality for the Agongdian Bridge are classified as medium to seriously-polluted. Thus, the water quality is classified as between medium to poor. The bad water quality resulted from wastewater discharged by metal and electroplating industries, pasturage and sewage. 2. Drinking water source quality monitoring There are two water monitoring sites located at Agongdian Reservoir (irrigation pipe inlet) and Agongdian Reservoir (inflow of Zhuo-shui Creek). The results in this year that above the standard level are turbidity in the first to fourth quarter, colour in the third to fourth quarter, odour in the third quarter, Fe(iron) in the second to third quarter, Mn(manganese) in the third quarter for Agongdian Reservoir(irrigation pipe inlet) and turbidity in the first to fourth quarter, colour in the third to fourth quarter, odour in the fourth quarter, TDS(total dissolved solids) in the third quarter, Fe in the second to third quarter, Mn in the third quarter for Agongdian Reservoir (inflow of Zhuo-shui Creek). The reason for turbidity, TDS, odour, Fe and Mn exceed limits are that Agongdian Reservoir are mostly mudstone geology which is difficult to settle down in water, after rainfall the water body was disrupted, suspended solids increased, the quantities of soluble iron and manganese increase accordingly. The reason for odour exceed limits was algae(geosmin and 2-MIB) increased in Agongdian Reservoir. 3. Ecological survey Ecological monitoring items include terrestrial ecosystems and aquatic ecosystems. The results during this and previous quarters are normal and tend to stable. The results fluctuated seasonally but did not decrease obviously from the third quarter in 2006 to 2014 that indicating the operation of the reservoir has no negative impact on the ecology at all sampling sites.