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本文建立了一个模拟河流中漏油的两层数学模型ＲＯＳＳ２，这个模型考虑漏在河中的油由表层油膜和分布在整个水深中的悬浮油珠两层组成，油的输送过程包括流动、扩散、紊动扩散和掺混、挥发、溶解、乳化、附着在岸边和沉积到河底等过程．该模型可用于瞬时的和连续的漏油且油漏在水面或水中的情况．该模型已用于美国Ｏｈｉｏ－Ｍｏｎｏｎｇａｈｅｌａ－Ａｌｌｅｇｈｅｎｙ（ＯＭＡ）河系及Ｓｔ．Ｌａｗｒｅｎｃｅ河上游．此模型不仅可用于模拟油，也可模拟其它有害物质的泄漏．
In this paper, a two-layer mathematical model ROSS2 is established to simulate the oil leakage in the river. The model considers that the oil leaking in the river consists of two layers of surface oil film and suspended oil beads distributed throughout the water depth. The oil transportation process includes flow, diffusion, Turbulent diffusion and blending, volatilization, dissolution, emulsification, attachment to the shore and sedimentation to the river bottom and so on. The model can be used for instantaneous and continuous oil spills and oil leaks on the surface or in water. This model has been used in the Ohio-Monongahela-Allegheny (OMA) river system and St. Upper Lawrence River. This model can be used not only to simulate oil, but also to simulate the leakage of other harmful substances.