太湖流域水环境变迁分析

Analysis of water environment variation in the Taihu Lake Basin

太湖水环境质量从20世纪90年代中期开始至2006年已下降为以Ⅴ类水为主,富营养化情况已由10 a前的轻度富营养化水平升至中度富营养化水平。从近年环太湖地区河流水质变化趋势来看,常州地区河流各项水质指标均呈恶化趋势。太湖叶绿素含量逐年上升,10 a间全湖均值增长了237%,增幅惊人,且近年有加速增长的趋势。太湖流域工业化与城市化及居民生活水平的提高,以及不合理的农业生产方式,使水环境面临巨大的压力。人们环保意识落后、治理能力不足、管理体制不合理是太湖目前水环境恶化的根本原因。针对太湖流域水质恶化的现状及原因,初步探讨了防止太湖流域水质污染的措施。

From mid-1990s to 2006,the water quality of Taihu Lake has been declined grade Ⅴ.The eutrophication condition has been become middle from light in past 10 years.From water quality variation of the rivers around the Taihu Lake in recent years,the various water quality indexes of rivers in Changzhou City area are all in a worsening state.The chlorophyll contents in the Taihu Lake have risen year by year,in past 10 years,average value have increased by 237% and shows the trend of accelerated growth in the late years.Industrialization,urbanization as well as shifts of irrational agricultural production mode and life quality improvements contributed greatly to water quality deterioration of the Taihu Lake.Moreover,backward consciousness about environmental protection,insufficient control ability and irrational management system are the fundamental reasons for water environmental deterioration in the lake.In the light of the worsening state and causes of the Taihu lake water quality,the countermeasures to prevent water pollution of the Taihu Lake are discussed.