多孔隙介質內之反應化學傳輸所造成地下流體流動型態改變與孔隙率反應波前的發展，對地球科學、石油工業與環境工程等都是一個重要的研究領域。本計畫為二年期研究，目的為探討多孔隙介質礦物發生化學溶解/沉澱反應時，造成孔隙率與水力傳導係數的變化。計畫第一年考慮多孔隙介質礦物溶解反應發生時，滲透係數-孔隙率關係式、礦物溶解比與滲透係數異向比對孔隙率反應波前的發展之影響，另外計畫中將藉由實驗室砂箱試驗，進行一連串溶解反應試驗，觀察單一溶解反應下孔隙率與滲透係數之關係。計畫第二年考慮多孔隙介質礦物溶解與沉澱同時發生，孔隙率反應波前相互競爭的發展與演變，並配合實驗室砂箱試驗，進行一連串同時溶解與沉澱反應試驗，溶解與沉澱同時發生孔隙率與滲透係數之關係數。研究結果將有助於了解碳酸系之石灰岩地層溶質傳輸與水力傳導係數等水文地質參數變化。 The evolution of hydraulic conductivity and flow patterns, controlled by reactive transport in porous rocks is an area of interest for many scientific, industrial and engineering processes. The objective of this 2-year project is to investigate the changes in porosity and hydraulic conductivity affected by geochemical dissolution/precipitation in porous media. In the first year, the effects of permeability-porosity relationship, mineral dissolution ratios and anisotropy ratio on the different respects of chemical dissolution front instability problems in fluid-saturated porous media will be investigated. Additionally, a series of laboratory sandbox experiments will be executed to quantify the changes in porosity and hydraulic conductivity affected by dissolution. In the second year, the morphological evolution of porosity and hydraulic conductivity induced by simultaneously dissolution and precipitation will be analyzed. Furthermore, laboratory sandbox experiments will be performed to study the relationships in porosity and hydraulic conductivity affected by simultaneously dissolution and precipitation. The final aspect of the project results will provide valuable information for understanding groundwater contaminant migration and to understand the mineralization of carbonate formation in the geochemical environment. 研究期間：9908 ~ 10007
