【摘要】 <正> 一、以往的营养状态指数或模式迄今,国外采用的营养状态指数或模式均为统计指数或统计模式。这些指数或模式又可分为三类。一类以经典的 Vollenweider 模式,以及 Dillon 模式和 Larsen-Me-rcier 模式为代表,他们以湖泊营养物质状况划分湖泊的营养型。这类模式能简便而明确地反映营养状态。一类以 Shannon-Brezonik 营养状态指数为代表,他们以物理指更多还原

【Abstract】 A few kind of foreign trophic state indexes or models are briefly descri- bed and assessed in this paper.It is shown that these indexes or models are all statistical ones and merely are adapted to assess tropic state of lake in some research regions or another comparable regions.So a new kind of trophic state index is proposed.The index is of characteristics as follows: totality,simplicity and reliability of showing lake trophic states,authority of assessment standards,and equality among the sub-indexes.The index sh- ortcoming is that it is only adapted for phosphorus-limiting lakes. In this paper the trophic state index is used to assess the trophic state of the West Lake in Hangzhou.The assessment result is both reasonable and reliable.更多还原