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Development of the oil particle model for complex river network
and numerical simulation of oil spill pollution

1，2 3 4
WANG Peng ，SHEN Xia ，WANG Chuanhai ，
1，2 2 1，2
HUA Zulin ，MA Yixin ，LIU Xiaodong
（1. Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education，
Hohai University，Nanjing 210098，China；2. College of Environment， Hohai University，Nanjing 210098，China；
3. Nanjing Hydraulic Research Institute，Nanjing 210029，China；
4. College of Hydrology and Water Resources，Hohai University，Nanjing 210098，China）

Abstract： In recent years， the oil particle model has been widely used in the two-dimensional and
three-dimensional numerical simulation of oil spill accidents in oceans，bays and other water bodies. Howev⁃
er，the one-dimensional hydrodynamic model is usually used to simulate the flow movement of the river net⁃
work. It is impossible to determine the flow directions of oil particles after they move to the nodes of the
river network according to the model prediction results. As a result， the existing oil particle model cannot
be applied to the simulation of oil spill pollution in river network. In this study，based on the characteris⁃
tics of oil slick transport in the river network area，an oil particle model-based simulation method for river
network area is proposed by defining the flow direction factors of outflow channels and determining the flow
directions of oil particles. The modified oil particle model was applied to simulate the oil spill pollution of
Taipu River，a main water transfer channel in Taihu Basin. The results show that the flow direction factor
method can appropriately simulate the transport and distribution process of oil particles in the complex river
network. The oil particle model based on the flow direction factor method is applicable for oil spill simula⁃
tion in river network areas with complex river system structure and changeable flow conditions. The re⁃
search results have great theoretical value and application prospect for improving the early warning and
emergency response capacity of oil spill risk complex river network areas.
Keywords：oil spill drift；mechanical spreading；weathering processes；bank adsorption；Taihu basin

（责任编辑：耿庆斋）

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