彰化地區無地表蓄水設施，民生與工業用水皆仰賴地下水供應，爲提高水源供應量並使當地水資源能更有效的利用，若能於河畔進行水源開發，可因含水層同時具有河川及地下水補注，減少因地下水位下降對地層之影響。
本研究利用數值軟體MODFLOW建構烏溪流域地下水流數值模式，由地下水位資料率定求得符合現地之地下水流模式，由烏溪流域地下水流線與等勢能線劃定快官地區數值模式，配合現場抽水試驗與雙環入滲試驗推求之現地水力參數，進一步探討河畔取水模式水平衡分析中之各項進出流量，以評估河畔取水對環境之影響。
由數值分析結果顯示，研究區域在未取水之情況下，河川補注含水層約8,037cmd，佔總入流量之13.53%，顯示河川補注效益良好，然而進行河畔取水後，河川補注量則增加至42.76%，評估其抽水引致之河川滲漏補注效益為29.23%。
利用率定後之數值模式，提出五個合適出水方案評估，設定目標出水量為60,000cmd，限制條件以1.04m為下限水位，由模擬結果顯示，將目標出水量分配至8口與12口抽水井方能符合地下水位限制，若水位洩降限制改為嚴重下限水位2.08m，則將目標抽水量分配至6口抽水井方案即可符合水位洩降限制。

Groundwater supplies both civil and industrial requirement in Changhua area because there are no facilities for reserving water on the ground. In order to lift the water supplies and to use the groundwater more efficiently, water source developing near the stream can reduce the effect on the layers due to the excessive drawdown. Since the stream and groundwater can supply the recharge of the aquifer.
This study used MODFLOW to construct a numerical groundwater flow pattern of Wu river basin, and then obtained the optimal hydro-geological model after calibration. The model was demarcated with the flow line and equipotential line of Wu river basin and at Kuai-guan. Integrating the local hydraulic parameters from the pumping test and double-ring infiltration test, each flow term in water budget analysis of the model was discussed. And the influence on the environment by pumping near the stream could be estimated.
The results of the model reveal that the stream recharged the aquifers about 8,037cmd before pumping, 13.53% of the total inflow. And the stream recharge increased to 42.76% after pumping. The assessed stream depletion induced by pumping was 29.23%.
This study proposed five appropriate pumping projects, using the calibrated model with objective pumping quantity 60,000 cmd and the limitative drawdown 1.04m. The simulated results reveal that when distributing the objective pumping quantity into eight to twelve wells could accord with the limitative drawdown. If the drawdown altered to the serious one, 2.08 m, distributing the objective pumping quantity into only six wells could accord that.

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