A Thesis On Safety Evaluation Of Navigation Environment In Wuxi Canal Waters

Inland-water-way transportation is considered as an essential transportation mode with the preponderances of larger transportation capacity, as well as being smaller-occupying, less-polluting, lower-energy-consuming. It is a significant support and sturdy guarantee to intensify material circulation, economical and social development to those cities along the river basin. Jiangsu province possesses the largest scale of water transportation. The extensive water ways joint all the municipalities and over80%county-level cities in Jiangsu, which provide a unique condition for the development of inland navigation. There are annually almost200,000ships sailing, berthing and operating in Jiangsu inland waters. Such a high traffic density brings about enormous economic benefits, followed by the complex navigation conditions which lead to frequent maritime accidents every year, giving people severe threats to their lives and properties. Therefore, the improvement of traffic safety for ships sailing in canals is a momentous urgent issue to be solved.Wuxi is one of the most developed waterway areas in Jiangsu Province and its canal waterway navigable environment prohibits a very distinct regional representative among the domestic water network. The present paper probes into the study on Wuxi Canal waters navigable environments based on the canal water features, and makes evaluations upon their impacts on navigation safety. According to security system engineering principles and methods, the basic assessment method, fuzzy comprehensive evaluation, is used to partition the risk factors of canal navigable waters. Analysis upon environment factors in Wuxi canal waters was comprehended with experts’investigations and data analysis. On the basis of the former analysis, evaluation index system was proposed and multi-hierarchy evaluation structure was established. AHP was applied to identify weight sets. According to survey and statistics of navigable environment in Wuxi canal water and the results from domestic and oversea research which concentrate on each evaluation index factor’s impacts upon navigation safety, the risk criteria for each evaluation factor were set. On that basis, membership-degree subset table of risk factors’evaluation criteria were studied and determined. Thus a single factor fuzzy evaluation model was established. Then single factor fuzzy evaluation model and the weight analysis of each index factor were combined to form the secondary fuzzy comprehensive evaluation model. And in terms of the above work, environmental risk assessment for the navigable waters of Wuxi canal was achieved and reasonable evaluation results were finally reached. Through the safety evaluation, risk level for environment risks and danger situation for index factors would be better understood and grasped for navigable waters in Wuxi canal. Therefore, the research has a practical value since it provides a scientific basis for maritime administration to improve navigation management and surveillance, and it also provides an available quotation for other river network regions to improve their canal navigable environment.