2019-01-012024-05-13https://scholars.lib.ntu.edu.tw/handle/123456789/654803摘要：隨著現代科學技術持續發展精進，所衍生之污染型態與強度亦日趨多元複雜。如果不加以適當的處理，工業廢水會嚴重破壞農業用水資源，將改變現有的農村生態系統，對農業環境造成威脅。 優良的灌溉水質是促進農業生產和保證生態平衡的關鍵。本研究選擇台灣苗栗縣苑裡鎮的山地，沿海和平原地區作為研究地點，並在研究的慣行和有機農田的入流口、田中央和出流口處採集水樣。比較不同採樣時間的分析結果，評估灌溉水質的變化。同時，進行水質模擬預測灌溉水質量變化。 根據研究結果顯示，由入流口進入慣行和有機農田的灌溉水並沒有超過灌溉水質標準。對於來自研究的山地，沿海和平原地區的常規農田的水質監測結果顯示，總凱氏氮濃度、硫酸鹽濃度、懸浮固體濃度、導電度和氯化物濃度超出灌溉用水水質標準。對於沿海地區有機農田的外流水，電導率和氯離子濃度均超過各自的標準。推估污染來源可能是糞便污染和過量施肥。這一結果意味著灌溉水質與耕作方法有明顯的相關性。結合水質監測和模擬結果，可以預測灌溉水質的變化，有效實施適當的控制措施，可提升農業生產力。<br> Abstract: As the society develops with modern technology advancement, the environmental pollution impact becomes more diverse and complex. Without proper treatment, the industrial waste water can severely deteriorate the water resources for agriculture as well as alter the existing rural ecosystem, posing threats to the agricultural environment. The excellent irrigation water quality is the key to promote agricultural production and assure ecological balance. This study chose the mountainous, coastal and plain areas in Yuanli Township of Miaoli County in Taiwan as the investigation locations, collecting water samples at the inlet, middle and outlet of the investigated conventional and organic farmlands. The analytical results from different sampling time were compared to assess the variation in irrigation water quality. Meanwhile, water quality simulation was conducted to forecast the quality variation of irrigation water. According to the experimental results, the inflow to conventional and organic farmlands did not exceed the standards of irrigation water quality. For the outflow from the conventional farmlands from the investigated mountainous, coastal and plain areas , the concentrations of total Kjeldahl nitrogen, sulfate, suspension solid, electric conductivity and chloride exceeded the standards of irrigation water quality. For the outflow water from the organic farmland in the investigated coastal area, the electric conductivity and chloride concentration exceeded the respective standard. The source of pollutions was suspected to be fecal contamination and over-dose fertilizer application. This result implies that the irrigation water quality has an apparent correlation with the farming method. Combining the results of water quality monitoring and simulation, the variation in irrigation water quality can be predicted and the agricultural productivity can be improved if the appropriate control measures are implement effectively.水質監測水質模式慣行農業有機農業Water Quality Monitoringwater quality modelingconventional farmingorganic farming