隨著地球暖化影響，極端氣候逐漸出現在世界各地區，天然災害之威力也隨之增強導致人民財產損失以及生命安全受到威脅。儘管天然災害具有強大殺傷力以及不可預測性，但人類還是有辦法可以降低其所帶來之衝擊。緊急疏散便是其中一項辦法。在緊急災害發生期間，如果能疏散居住在危險地區的災民，是能有效的降低災害所產生的傷亡人數。然而在災害發生的環境底下，路網系統裡面的道路可能因此受到損壞而導致無法通行。台灣是特別容易受到颱風的侵襲的地方，而颱風往往伴隨著大量雨量，導致山區土石鬆軟進而容易發生土石流以及山崩現象。所以降雨量多寡是一個很重要的衡量指標。然而在過去的很多有關疏散的研究裡面，並沒有考慮到路網可能在災害環境底下受損的可能，多半均假設路網在緊急疏散時皆是完好無損。因此本研究即是在以雨量為指標下考慮路網之可靠度，同時建立一套動態疏散模型來模擬現實在天災環境底下，進行疏散工作之成效並利用CPLEX來求解。本研究在進行一連串實驗過後，驗證了考量路網可靠度會對緊急疏散有相當之影響，同時也加入了一條疏散改良策略來加強疏散效率。

Nature disaster may happen everywhere at any time and cause lots of property and casualties lost. Although they are “harmful” and “unpredictable”, there are still many ways to decrease the damage. Emergency evacuation is one of the strategies. During the disaster, according to emergency evacuation management, evacuating residents who live in the hazard zones is necessary and this strategy is effective in lower down the casualties. Under disasters condition, the links may close and network is be unstable. Especially Taiwan is often hit by typhoon. The heavy precipitation is one of the important measurements to evaluate the network reliability. However, few researches were considered about network reliability issue and most of them assumed that all of links can work in disaster condition. Therefore, the research considers precipitation as network reliability measurement and also constructs the dynamic evacuation model to optimal the evacuation performance. So it can be close to the real-world evacuation scenario under disaster. Through a series of experiments, the research verifies that the network reliability affects the evacuation performance and an optimal strategy is also been proposed to help adding evacuation efficiency.

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