台灣海域遊憩活動發展日益蓬勃，以往多以禁止或限制的政策管理水域遊憩活動，近年改施以開放、鼓勵的政策，因此，風險的掌握有其必要性，事先知悉海域遊憩活動環境的風險有助於降低災害之發生，本研究針對海域遊憩活動進行風險評估研究。
本研究藉由模糊德爾菲法建立與海域遊憩活動關聯之風險評估指標與因子，再藉由層級分析法分析各因子權重，計算各因子的相對重要性，並同時考慮危險度與脆弱度進行風險分析，分析因子中，除了納入海氣象水文特性與地文環境特性外，亦考慮了海岸地區的社會經濟、醫療與救災量能以及遊客行為等進行風險評估。
本研究透過海氣象水文與地文觀測資料與數值模擬，以及專家問卷蒐集分析資料，研究結果顯示，對於海灘型態的海岸，共有10項危險度因子和12項脆弱度因子納入分析，危險度因子中權重最高者為「近岸海底坡度」，脆弱度因子中權重最高者為「安全救生設施」。
本研究選擇台灣七處熱門遊憩海岸包含不同海岸型態進行風險評估分析，並比較有無考慮暴露度的風險等級，在遊憩活動上，暴露度可以遊客人數代表之，結果顯示，暴露度的納入對風險等級帶來顯著的影響。風險評估建議應定期更新，資料的齊全性高度影響了分析結果，是未來要有更正確評估應留意之事項。

In the past, comprehensive policies had been strictly implemented on water recreation activities. However, as ocean recreation becomes more and more popular, the policies have become loosen in recent years; Therefore, it is necessary to gain a sufficient understanding of the potential risks. By acknowledging the risks of ocean recreational activities in advance, the occurrence of disaster could also be reduced. This study is concerned with the risk assessment on ocean recreational activities. Risk assessment indicators related to ocean recreational activities are established by the Fuzzy Delphi method. The weight of the indicators is analyzed by the AHP method, which is calculated for the relative importance of each factor. In addition to ocean meteorology and hydrological characteristics and ocean environment, the indicators have also taken social economy, medical response capacity for disaster, and tourist behavior of the coastal area into account for risk assessment.
The results show that the beach type of risk assessment includes 10 hazard indicators and 12 vulnerability indicators. In this study, we select seven popular recreational coasts in Taiwan for risk assessment and compare their risks with and without the consideration of exposure index, as the exposure index can be represented by the number of tourists. In addition, it is necessary to be aware of the completeness of data to conduct a more accurate assessment, as the completeness of the dataset can cause a significant impact on the assessment result.

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