肇庆星湖水质现状与变化趋势  

Water quality and its change in Xianhu Lake, Guangdong Province

作　　者：杨浩文[1] 黄芳 林少君[3] 韩博平[3] 

机构地区：[1]广东省水文局,广州510150 [2]广东省水利所,广州510150 [3]暨南大学水生生物研究所,广州510632

出　　处：《生态科学》2004年第3期204-207,共4页Ecological Science

基　　金：广东省水文局重点项目(swz2003-1)资助。

摘　　要：在2002年对星湖四个子湖进行采样调查,运用相关加权综合营养状态指数来评价水质营养状态,结果富营养化程度由高到低依次为波海湖、中心湖、青莲湖、仙女湖。与1996～1997年的调查结果比较,波海湖仍处于富营养化状态,中心湖富营养化程度加剧,其富营养化程度超过了青莲湖和仙女湖,由中营养型过渡到了中富营养型。营养盐与叶绿素a的相关分析表明,硝态氮与叶绿素有正相关关系,与磷盐没有明显相关性,说明了硝态氮是星湖初级生产力的主要限制因子之一,而磷的含量充足,对初级生产力没有明显的限制作用。与1996～1997年比较,星湖总氮负荷增加46.5%,总磷负荷下降40.8%,而叶绿素a由6.0mg·m-3升高到16.9mg·m-3,说明星湖的富营养化仍在进一步加剧。Xianghu Lake is tropical urban lake, lacated in Zhaoqin city of Guangdong Province, and it has five sublakes which connect each other. The water quality for the four sub-lakes was investigated in 2002. The results indicated that the trophic level in the sublake Bohai was the highest, and followed by sublake: Zhongxin. In comparison with the measurement in 1996-1997, Zhongxin sublake, used to be the lowest sulake in trophic level, changed from mesotrophic to meso-eutrophic. The concentration of Chlorophyll-a was significately relayed to the concentration of NO3- , but not with the concentration of PO43-, suggested that NO3- may be the main limited factor for primary production. In contrast to the data from 1996-1997, the nitrogen loading in Xinghu Lake increased by 46.5%, phosphorus loading decreased by 40.8%, the concentration of Chlorohylla increased from 6.0mg·m-3 to 16.9 mg·m-3.

关 键 词：肇庆星湖 水质 趋势 富营养化 

分 类 号：X524[环境科学与工程—环境工程]