象山港赤潮监控区水质状况的动态变化

Dynamic variation of the water quality in Red Tide-monitoringArea of Xiangshan Harbor

根据2002年4～9月份象山港赤潮监控区水质监测基础资料,建立表、底层DO、COD、DIN、DIP以及水质指数(A)和富营养化状态指数(E)时间序列,运用变异系数和相关分析法,探讨了象山港赤潮监控区在赤潮多发期水质状况的动态变化特征。分析结果表明:在赤潮多发期,监控区水质有机污染程度和富营养化状态较严重,明显呈低P高N状态;各环境参数的动态变化存在着明显差异;各环境参数对水质有机污染程度和富营养化状态的贡献也存在显著差异,且赤潮监控区水质富营养化指数与水质指数之间呈显著的正相关关系。

Based on the monitoring data of water quality from April to September(2002) in Red Tide-monitoring Area of Xiiangshan Harbor,the timing series of DO、COD、DIN、DIP、 A and E in the surface layer water and the bottom water were built respectively.Using the methods of (coefficient) of variation and relative analysis, the characters of dynamic variation of water quality in Red Tide-monitoring Area of Xiangshan (Harbor) were (discussed) in the periods of high frequency for the red tide.The results shown that the water quality in Red Tide-monitoring Area was on situation of serious super-nutrition and organic pollution and on state of high N and low P; the differentia of the dynamic variation of the (environmental) parameters was obvious existence; the contribute of the environmental parameters to the states of super-nutrition and organic (pollution) was different remarkably with each other; moreover, a observably positive correlation was existing between the state of super-nutrition and organic pollution in periods of high frequency for the red tide.