【摘要】 为进一步弄清红枫湖水体的富营养化状况,运用综合营养状态指数法,对2003-2009年共7年时间红枫湖水体的富营养化特征进行了分析与评价。结果表明:红枫湖水体透明度年均值变化不大,pH、高锰酸盐指数、叶绿素a呈逐年上升趋势,且近年的pH和叶绿素a年均值显示红枫湖存在水华爆发的风险;总氮、总磷年均值较高,虽呈逐年下降趋势,但年均值均超过地表水Ⅲ类水质标准,7年中,总氮年均值分别超标1.46、2.68、2.39、1.35、1.67、0.58和0.58倍,总磷年均值超标倍数分别为6、0.16、1.2、10、4.4、2.2和0.4倍。2003年、2006年和2008年红枫湖水体营养状态为富营养型,2004-2005年、2007年和2009年为中营养型,总磷和总氮为水体富营养化状态分级的主要贡献因子,红枫湖水体的营养状况为中-富营养水平,且有富营养化发展的趋势。更多还原

【Abstract】 The eutrophication characteristics of Hongfeng Lake during 2003-2009 were analyzed and evaluated by synthetical trophic state index method to further clarify the status of the Hongfeng Lake water eutrophication.The results showed that the annual water transparency of Hongfeng Lake varied little.pH,permanganate index and chlorophyll a showed an increasing trend.The annual data of pH and chlorophyll a in recent years presented a water bloom risk.The annual mean values of total nitrogen and total phosphorus were high,although declined year by year,but the annual mean value surpassed water quality standard III of surface water.In the seven years,the annual mean value of total nitrogen exceed by 1.46,2.68,2.39,1.35,1.67,0.58 and 0.58 times,and total phosphorus by 6,0.16,1.2,10,4.4,2.2 and 0.4 times.The trophic status was eutrophic type in 2003,2006 and 2008.And mesotrophic type in 2004-2005,2007 and 2009.Total phosphorus and total nitrogen were the major contribution factors of eutrophication classification.Generally speaking,the nutriture of Hongfeng Lake was at meso-eutrophic level,and had the development tendency of eutrophication.更多还原