濁水溪沖積扇地區由於長年缺乏妥善規劃及經營地下水資源，過度使用地下水引發地層下陷等許多環境問題。含水層儲蓄回抽(Aquifer storage and recovery,簡稱ASR)是將多餘的地表水注入到地下含水層當中，於需要時回抽使用的技術，此方法是管理豐水期多餘水資源，並克服乾季缺水情形之可行計畫。而含水層儲蓄回抽其性能是使用回收效率為主要評估方式，其定義為符合水質標準之總回抽水體積與總注入水體積的百分比。而含水層儲蓄回抽場址的選擇受到水質以及水文地質的空間變異影響。本研究提出基於飲用水水質標準及灌溉用水水質標準的含水層儲蓄回抽場址選址的方法，利用一般克利金取得研究區域之地下水質以及水文參數，接著使用簡化之地下水流及水文條件，模擬含水層儲蓄回抽可能回收效率。研究結果為可行之含水層儲蓄回抽選址依據，可提供政府及相關單位參考使用。;Land subsidence due to groundwater exploitation is an urgent environmental problem in Chou-Shui river alluvial fan in Taiwan. Aquifer storage and recovery (ASR), where excess surface water is injected into subsurface aquifers for later recovery, is one promising strategy for managing surplus water and may overcome water shortages. The performance of an ASR scheme is generally evaluated in terms of recovery efficiency, which is defined as percentage of water injected in to a system in an ASR site that fulfills the targeted water quality criterion. Site selection of an ASR scheme typically faces great challenges, due to the spatial variability of groundwater quality and hydrogeological condition. This study proposes a novel method for the ASR site selection based on drinking quality and irrigation quality criterion. By using ordinary Kriging to get spatial distribution of groundwater quality and hydrogeological condition. Simplified groundwater flow and contaminant transport model spatial distributions of the recovery efficiency with the help of the groundwater quality, hydrological condition, ASR operation. The results of this study may provide government administrator for establishing reliable ASR scheme.
