水庫放水策略受到水理因素或操作規定及習慣的影響，使得閘門放水量及放水變量具有離散特性，以至於線性規劃計算出之最佳放水策略無法或不便於實際操作。
　　本研究應用線性整數規劃法，並採用廊道疊代分析方法，求得逐時段水庫的最佳放水策略，提供給水庫運轉管理當局參考，並便利操作人員配合現地操作規範與習慣之閘門流、自由流放水量執行實際運轉。為應用廊道觀念，採二階段規劃方式，首先用線性規劃得依初步之放水策略，爾後採用前次計算結果設置整數規劃廊道，經疊代分析得收斂之最佳解。
　　以曾文水庫設計最大可能洪水的進水量歷線來模擬，模擬結果顯示，以線性整數規劃疊代求解防洪運轉策略，每一決策時段之計算時間約1~2分鐘(電腦CPU為Intel T2250 1.73GHz*2)，防洪運轉策略可達到收斂。防洪運轉之最高水位與最大放水量皆比設計時稍高，可能因為水庫淤積之影響有關。

Hydraulic factors, operating regulations and personal habits force the spillway discharges ought to be released in certain discrete values. Therefore, a continuous discharge decision to be generated by linear programming can not be directly carried out in real operation.
Flood control operation of a reservoir is generally divided into four stages corresponding to opening spillway gate, rising limb of inflow hydrograph, recession limb and closing gate. Distinct operative objective was proposed in this thesis to generate proper releasing strategy for each stage. The releasing policy also considered both gate flow and free flow conditions. The mixed integer programming was applied to obtain the discrete optimal hourly releasing strategies for all operational stages.
To generate the optimal releasing strategy within a short period of computation time, a corridor around the optimal discrete releasing trajectory and iterative procedure were imposed. This research first applied linear programming to obtain the initial trajectory of spillway release. It then set up an integral corridor of discrete releases based on the previous results. Finally, the iterative procedure analyzes optimal releasing strategy till its convergence.
The probable maximum flood (PMF) of Tsengwen Reservoir was adopted to test the proposed methodology. The mixed integer programming obtained a convergent releasing strategy within 2 minutes with an Intel T2250 1.73 GHz*2 CPU.

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