Control Mode of Waterway Traffic under Dangerous Mountain Landslide Conditions
CHENG Zhiyou1,2,3,4, WANG Pingyi1,4, YANG Chengyu4, WANG Shixian5, ZHENG Jie6, LI Yaling7
1. Key Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education, Chongqing Jiaotong University, Chongqing 400074, China; 2. Hubei Key Laboratory of Inland Shipping Technology, Wuhan University of Technology, Wuhan 430063, China; 3. School of Shipping and Naval Architecture, Chongqing Jiaotong University, Chongqing 400074, China; 4. National Engineering Research Center for Inland Waterway Regulation, Chongqing Jiaotong University, Chongqing 400074, China; 5. Command Center, Changjiang Maritime Safety Administration, Wuhan 430016, China; 6. Command Center, Chongqing Maritime Safety Administration, Chongqing 401121, China; 7. School of Transportation, Wuhan University of Technology, Wuhan 430063, China
Abstract：The control mode of waterway traffic under dangerous mountain landslide conditions was studied to safeguard ship navigation and enhance the transportation efficiency of water channels. Large-scale surge generated by paroxysmal mountain landslides was considered based on a considerable amount of case data, conclusions from physical model experiments, conclusions from consulting the literature, and data from practical investigation. The occurrence probability of mountain landslides was estimated according to the stage of landslides deformation and effects of external environmental forces. The maritime risk caused by mountain landslides was assessed according to the stage of landslides deformation, the scale of the surge generated by mountain landslides, and effects of external environmental forces and restricted environmental conditions on ships. The control mode of waterway traffic, which included forms of traffic control and prohibited levels of ship traffic, was designed based on evolving traits of maritime risk. The form of traffic control should depend on the estimated occurrence probability of mountain landslide, and the prohibited level of ship traffic should depend on maritime risk caused by the mountain landslide. A case study shows that, when the occurrence probability of a mountain landslide is 0.6 and the maritime risk of a mountain landslide is 1.80, the alert mode of traffic control must be adopted. When the occurrence probability is 0.6 and the maritime risk is 2.25, the mode of traffic control with a definite ship flow form must be adopted. When the occurrence probability is 0.72 and the maritime risk is 2.16, the mode of traffic control with definite ship objects and definite time must be adopted; when the occurrence probability is 0.72 and the maritime risk is 2.70, the prohibited mode of traffic control is necessary.
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