Abstract: The COD, IN and IP of Rushan Bay in spring tidal phase of August, 1994 are used as single and multiple indexes to evaluate its nutritional condition. The results show that the nutritional conditions at the mouth of Bay and the inlets of east and west valleys are better, but are eutrophic at the rest of the Bay. In east and west valleys, COD is 0.61 and 0.93 mg· L^-1, IP is 0.017 and 0.015 mg· L^-1, and iN is 0.212 and 0.369mg· L^-1,respectively.

Key words: Rushan Bay, Nutritional condition evaluation, Eutrophication, soil erodibility, measure and estimation method, influencing factor, spatial-temporal variation characteristics, evaluation indicator