Research On Dicission-making Support System For Sinkable Chemicals Spilled Shipboard

With the increasing transportation of liquid chemicals in bulk by ships, the risk of the chemicals spill is getting higher and higher. So the reasonable numerical modeling of the spilled chemicals at sea is a key technique for the risk assessment and contingency decision-making. The sinkable chemicals spilled at sea always ended in sediment, so the design of decision-making support system for sinkable chemicals spilled shipboard have academic and applied sense.Based on the analysis for the environmental harm caused by the transportation shipboard of chemicals and research on related ordain in the international common and intestine law , the paper analysis the impelling need of establishing related respond system for contaminative accident. After analyzing the character of sinkable chemicals and that of all action progress after this type of chemicals spilled into the sea, the paper established corresponding numerical model and programmed them.The tidal ground is the key factor who affect the action of spilled chemicals. Based on the analysis of the State-of-the-art numerical modeling on the tidal current, spreading of pollutant at sea. Then selected the Pearl River Estuary as the application region, simulated tidal ground using HAMSOM. Model, then calculated the tidal consistent constant and saved as map layer as the data for tidal fast prediction. The result of comparing the model result and investigative data indicated its rationality.Later applied the model in the numerical predication of sinkable chemicals spilled beside ZhuHai region. Inputted the quantity of spilled chemicals, the type of chemicals, the marine environmental background et al, then get physical and chemical character of the chemicals from database which had been established, simulated its action individual by all the model established for each progress. The result was showed in the GIS(geography information system) and indicated its rationality.