东太湖典型湖区水环境特征时空变化分析

Study on the water environmental characters for spatial and temporal variation in the typical districts of Lake East Tai

本文研究了2002年4月至2003年4月东太湖的东茭嘴、油车港、太浦河口、湖心C、大缺口和张家港等6个典型湖区水环境特征。监测数据表明,东太湖6个典型湖区水质参数变化四季分明、空间差异显著;受水生高等植物的净化作用、湖区周边居民面源污染和上游苕溪来水水质等3方面因素的综合影响,枯水期水质明显不如丰水期。冬春季节水生植被净化能力的减弱和城镇居民生活面源污染的加强形成东太湖水质西南差东北好的格局、夏秋季节水生植被净化能力的加强和上游苕溪来水水质的改善形成西南水质好东北差的格局。利用太湖站同期水环境监测资料,比较了草型湖湾东太湖与藻型湖湾梅梁湾水环境因子的差异。提出东太湖春季期间水体中NH4+-N、NO3--N浓度的消长变化可能是维持东太湖水体能够保持清水状态的触发因子。

A systematic water environment research had been done on Dongjiao mouth、Youche habor、Taipu estuary、central lake C、Big gap and Zhangjiagang et al six typical regions of East Tai Lake from April,2002 to April,2003.The results suggested′ the water quality condition of East Tai Lake changes evidently with seasons and space,mainly due to aquatic plant′s purification、the peripheral inhabitants′ non-point source pollution and the upstream Tiaoxi coming water three aspects combined action.The drought season water q...