Modeling of hazardous chemicals shipping in inland waterways under multi-risk cooperative control
In order to keep the balanced improvements in the aspects of economic,safety,and environmental protection of hazardous materials shipping,the multi-objective optimization of hazardous materials shipping on the inland river is proposed under the consideration of cooperative control of multiple risks,aiming to make decisions for the shipping route design,vessel allocation,and cargo loading planning simultaneously.Focusing on the leakage,a risk diffusion model is developed.With the consideration of the combined impacts of vessel collisions with bridges and explosions,the damage risk assessment is formulated accordingly.A multi-objective 0-1 mixed-integer nonlinear programming model,maximizing the economic benefits,minimizing the environmental and collision risks,is developed.Also,the solution procedure based on the genetic algorithm is designed.Finally,some numerical tests are provided to demonstrate the corresponding workability,where the computational results show that,the developed method can provide several efficient plans.In comparison to the traditional risk assessment,the new risk model can provide an optimal plan with an incensement of 3.97%in economic benefits.Comparing to the general method,the proposed algorithm can reduce the computational time by at least 63.80%and keep stable computational performance.