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    題名: 地層下陷先進監測分析技術及管理策略整合研究-地層下陷先進監測分析技術及管理策略整合研究(I);Innovative Monitoring, Analysis Technologies, and Management Strategies for Mitigation of Land Subsidence
    作者: 倪春發;石棟鑫;洪志銘;游景雲;張文彥;顏君毅;張竝瑜;葉大綱;王士榮;羅偉誠
    貢獻者: 應用地質研究所
    關鍵詞: 地層下陷;土壤壓密;含水層;遙測;數值模擬;海水入侵;人工補注;land subsidence;soil consolidation;aquifer;remote sensing;numerical modeling;seawater intrusion;artificial recharge
    日期: 2020-12-08
    上傳時間: 2020-12-09 10:55:32 (UTC+8)
    出版者: 科技部
    摘要: 抽水引致的地層下陷多發生於河川或湖泊沈積所形成的含水層,這些含水層常夾雜細顆粒泥質土壤,具有相對高壓縮的特性,根據過去相關的觀測數據顯示,一旦長期地層下陷趨勢發生,即使減緩或停止抽水,只能減緩下陷速率,無法回復原有狀態。因此,對於地層下陷的發生區域,能有效與準確的監測、評估與預測地層下陷機制,成為未來國土規劃與管理的重要參考依據。地層下陷的研究屬於跨領域的科學,且特定地區的地層下陷問題會根據地區的水文地質特性、社經條件、以及用水行為而變。在監測技術之外,瞭解含水層中的水流與土壤壓密行為關係,土壤的力學作用與地下水流的反饋機制,地下水流與地層下陷模擬分析,含水層流動與壓密參數推估等,都是決定地層下陷分析工具可靠與否的重要關鍵。本計畫考慮以台灣中部,濁水溪地下水區內的顯著下陷區作為研究區域,特別是雲林縣內的虎尾、元長、土庫及褒忠等鄉鎮地區,提出整體計畫申請。總計畫研究計畫主題為「地層下陷先進監測分析技術及管理策略整合研究」,此為期三年的研究規畫將結合衛星及空載遙測、地表變形監測、地表及井下地球物理探測、地質模型、水文地質、數值模擬等工具方法,聯合國內遙測技術、水文、地下水、地質、地球物理、土壤力學、以及模式分析領域的專家學者共同組成研究團隊,深入探索研究區域內地層下陷的機制與關係、監測與分析技術、以及地層下陷減緩的決策與管理等議題。研究成果將提供研究區域長期高時、空解析度之地表變形歷程,開發的模式可提供解析下陷中心遷移歷程、地層分層特性與特定產業抽水行為關係。此外,亦透過監測與模式量化含水層天然與人為出入流特性關係,以及建立地層下陷區域與次生災害(如淹水、海水入侵、農業衝擊、經濟損失等)或積極作為(如減抽、人工補注、產業轉型等)之關聯性,提供未來擬定減緩地層下陷管理策略時的重要參考依據。 ;The pumping-induced land subsidence generally exists in an aquifer that is created by lake or river surficial deposit processes. Such aquifer generally includes fine materials that are relatively highly compressible. Previous investigations have indicated that the long-term trend of a land subsidence area reveals the irreversible situation for the aquifer deformations even if the amount of the pump water are significantly reduced or stopped. Therefore, the effective and accurate predictions of land subsidence mechanisms are key references for future water resource managements and homeland security planning. The studies of land subsidence are multidisciplinary sciences. The problems of land subsidence at specific locations depend on multiple factors, including hydrogeological conditions, social-economic conditions, and most importantly, the behavior of local groundwater use in the subsidence areas. In addition to accurate monitoring data, the understanding of interactions between groundwater flow and soil compaction/consolidation, the detail processes of groundwater flow and subsidence simulations, and the accurate estimations of flow and compaction parameters are important factors to develop accurate and reliable technologies for land subsidence analyses. Motivated by the requirements for such key issues for land subsidence analysis, we proposed an integrated project “Innovative monitoring, analysis technologies, and management strategies for mitigation of land subsidence” that aims to use innovated monitoring, experiment, and modeling techniques to characterize the subsidence mechanism and the associated stresses in the severe land subsidence areas in Yunlin county in western central Taiwan. The results of the study are expected to provide long-term and high spatial and temporal resolution of land subsidence history in the study areas. The developed models aim to reconstruct the migration behavior of the subsidence center and clarify the key stresses induced by local water users. Additionally, the developed monitoring and model techniques are expected to quantify regional inflow and outflow of the aquifer system and quantify the impact of land subsidence on the secondary hazards such as flooding, seawater intrusion, and local agriculture and economic losses. How the influence of positive actions such as reduced pumping, artificial recharge, and industrial transformation on the mitigation of land subsidence will be systematically discussed in the study. The results of the study can be important references for planning the management strategies of land subsidence areas in Taiwan.
    關聯: 財團法人國家實驗研究院科技政策研究與資訊中心
    顯示於類別:[應用地質研究所] 研究計畫

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