Research on Navigation Risk Identification of Three Gorges Ship Lock Based on Improved Analytic Hierarchy Process

As one of the world famous navigation architectures, Three Gorges ship lock plays a significant role in the inland water transport system of China. Combining analytic hierarchy process and discrete fuzzy set, the factors that may affect the navigation safety of the Three Gorges Ship Lock are analyzed step by step from the perspectives of human, ship, environment, and management by using expert survey data. The results show that the total contribution rate of safety management to the navigation risk of the Three Gorges Ship Lock is up to 16%, and the human factor is a crucial factor affecting the navigation risk. The utility of risk control schemes can be evaluated through risk assessment. Suggestions are further made for maritime administration and accident prevention in the Three Gorges Ship Lock waters.