长江河口南支水域溶解氧动力学模型的应用

应用Netherlands Instilute of Ecology (NIOO)的环境生态动力学模型Femme，在长江河口南支河段建立了1个一维的溶解氧动力学预测模型。运用此模型得出该区域深解氧和有机物时空分布情况并加以分析，结果显示该区域的有机物污染并不严重，其分布趋势大体为：排污口附近污染较多，枯水期更为明显；丰水期由于长江径流的稀释作用，有机物浓度大大降低；黄浦江、上海竹园排污口处有机物浓度最大。此结果同各种参考文献中提供的资料和观测值基本一致，也基本证实这是1个可行的预测溶解氧的模式。

A 1-D Oxygen Hydrodynamic Model for the Southern Part of the Yangtze Estuary

Based on the environment model 'Femme', a 1-D budget model for the southern part of the Yangtze Estuary is built, in which three state variables are considered. They are dissolved oxygen(DO),organic matter and salinity. the inflows include runoff from land,tidal flow,sewage discharge. The seasonal changes of DO, organic matter and salinity in the Yangtze Estuary have been modeled in this work. And the modeled results show that in flood season the concentration of DO is the lowest in the whole year; and the concentration of DO in summer is lower than in the whole winter. The spatial distribution of DO appears is that lowest concentration of DO appears in the areas where there is much organic matter. The waste water,inflow,temperature and wind are the most important factors that influence the spatial and temporal concentration distributions of DO.