Abstract
In view of the fuzziness and randomness of the safety evaluation of the channel navigation environment, a risk evaluation model of the channel navigation is established with the set-valued statistics and the gray theory. A safety evaluation index system of channel navigation consisting of first-level indexes for the natural environment, navigation conditions, and traffic environment as well as 12 s-level indexes were established on the basis of comprehensively analyzing factors influencing the safety of the channel navigation environment. The weight of each evaluation index is determined through the model utilizing the set-valued statistics; also, the evaluation sample matrix is determined to realize the initial construction of the environmental scenario of channel navigation; and the safety of the channel navigation environment is evaluated quantitatively with the gray fuzzy comprehensive evaluation method. Taking Guangdong inland channel as an example, the result shows that the safety evaluation method based on the set-valued statistics and the gray fuzzy theory features simple calculation as well as objective and accurate results, which is convenient for practical application.
Highlights
The channel is an important part of the water transport system, whose navigation environment has a significant impact on the safe navigation of the ship
The weight vectors obtained of each evaluation index in the evaluation system are
In view of the fuzziness and uncertainty of the channel navigation system, a gray-fuzzy risk evaluation model of channel navigation is built in this chapter on the basis of the gray system theory and the fuzzy mathematics theory, so that theoretical supports can be provided for evaluating the risk of navigation channel and ensuring the navigation safety of that channel
Summary
The channel is an important part of the water transport system, whose navigation environment has a significant impact on the safe navigation of the ship. How to protect the safety of shipping navigation environment is an important research work on safety management of shipping channel. There are many factors affecting the safety of the channel navigation environment. In order to ensure the safety of channel navigation, these influencing factors should be analyzed and studied to provide a scientific and reasonable judging basis for the safety evaluation of the channel navigation environment. A variety of research have been made on the channel navigation environment by many professionals. Wang et al [1] proposed a DEA model algorithm, and analyzed and evaluated navigation environments in channels of Keelung and Kaohsiung, etc. Wang et al [1] proposed a DEA model algorithm, and analyzed and evaluated navigation environments in channels of Keelung and Kaohsiung, etc. through using linear
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