Abstract:We have established 8 sampling spots in West Lake, and selected spot 7 which can most represent the water quality status of it as study object by principal component analysis. With sufficient samples got by the inserted method, based on the aquatic data (2000.1~2001.4) of West Lake by routine measurement, we studied the feasibility of using Back propagation (BP) neural network to predict the short term trends of the state of aquatic ecology (the concentration of chlorophyll-a), and looked for the most influ...