With the rapid development of China's economy, especially the implementation of the "Ocean Power" strategy, the number of ships has increased rapidly, and the trend of high-speed and large-sized ships is increasingly evident. The risk assessment of port waters is of great significance to the safety of ship navigation, and can provide reference value for the supervision of Maritime department. In order to evaluate the risk status of different port waters objectively and quantitatively, and to determine its risk level, based on entropy weight method and matter-element theory, the risk evaluation model of entropy weight matter-element is established, which overcomes the subjectivity and uncertainty of weight distribution of each risk evaluation index. As an example, the entropy matter-element model is used to evaluate the water traffic safety risk in three port waters, the Binzhou port, Dongying port and Weifang port, synthetically considering the natural environment, traffic environment, port condition and security condition of the three ports. In order to test the objective and quantitative evaluation results, 30 maritime experts have been invited to score the risk degree of the port according to their own experience. The results of qualitative and quantitative evaluation are compared to verify the accuracy and reliability of the evaluation model.
The navigation safety of ships is closely related to the navigation environment of port waters. At present, fuzzy comprehensive evaluation method is mainly used in risk assessment of port waters. For example, L Zhao (2010) determined the evaluation index system according to the influencing factors of Tianjin harbor navigation environment, used fuzzy evaluation method to evaluate and analyze the safety of Tianjin harbor navigation, and made a comparative analysis with the evaluation results of evidence theory analysis method. JB Zhang (2013) applied the research framework of Formal Safety Assessment (FSA) to the navigation Safety Assessment of ships in Tianjin port waters and conducted a relatively comprehensive risk Assessment. According to the characteristics of Lanshan port area, XD Tang (2015) comprehensively adopted analytic hierarchy process and fuzzy comprehensive evaluation method to reflect the influence degree and overall situation of navigation safety risk factors in Lanshan port area. GX Chen (2012) used the fuzzy comprehensive evaluation method to build a risk evaluation model based on the statistics of maritime traffic safety accidents in Qingdao port, determined the high risk area and main accident causes in the water area, and proposed effective risk prevention and control measures.
