贵州高原红枫湖水库叶绿素a浓度的时空分布及其与环境因子关系  

Temporal and Spatial Distribution of Chlorophyll-a Concentration and Its Relationship with Environmental Factors in Hongfeng Reservior,Guizhou Plateau,China

作　　者：邓河霞[1] 夏品华[1] 林陶[1] 陈文生[1] 张邦喜[1] 杨小红[1] 李存雄[1] 

机构地区：[1]贵州师范大学贵州省山地环境信息系统与生态环境保护重点实验室,贵阳550001

出　　处：《农业环境科学学报》2011年第8期1630-1637,共8页Journal of Agro-Environment Science

基　　金：贵州省教育厅重点项目(200910040);贵州省社发攻关项目(SY20103176);贵阳市社发攻关项目(2009304);贵州省基金项目(20082239)

摘　　要：采用2010年对红枫湖水库叶绿素a和理化因子的逐月监测数据,分析了叶绿素a浓度的分布、动态及其与环境因子的关系。结果表明:红枫湖水库叶绿素a浓度具有明显的时空分布特征,在时间上,叶绿素a浓度排序为夏季>秋季>冬季>春季,且在7月份最高,原因是降雨携带充足的磷进入红枫湖,使浮游植物迅速增殖;在空间上,叶绿素a浓度沿入湖河流至大坝出水逐渐降低,总体上南湖高于北湖,这与红枫湖水库磷污染源的空间分布以及浮游植物生长为磷限制有关,南湖因上游有工业点源和城市生活废水的输入而使磷浓度高于北湖。水体叶绿素a与透明度在春季、夏季和冬季呈负相关,与水温在夏季呈正相关,与总磷在春季和秋季呈正相关,而与总氮相关性较复杂,与氨氮无相关性。叶绿素a浓度水平指示红枫湖水库水体处于富营养化状态。Hongfeng Reservoir is the largest artificial Karst lake in Guizhou Plateau and therefore plays an important role in water supply for Guiyang City.The distributions and dynamics of chlorophyll-a were analyzed based on the monthly monitoring data of Hongfeng Reservior in 2010,as well as the correlation between chlorophyll-a and other environmental factors mentioned in the paper.The results indicated that the concentration of chlorophyll-a varied obviously in time and space.In time,the values followed the order of summerautumnwinterspring,with the concentration being the highest in July because large quantities of phosphorus entered the reservoir with rainfall,increasing the number of algae.In space,the concentration of chlorophyll-a gradually decreased due to the influence to the dam,and basically was higher in the south part of the reservoir than in the north part.This was probably in connection with the spatial distribution of phosphorus pollutant sources and algae＇s phosphorus-limited growth style.Thus the south part received more phosphorus contributed to the larger input from industrial point source pollution and urban sewage than the upstream north part.The correlation between chlorophyll-a and other environment factors was complex.The correlation between chlorophyll-a and transparency was negative in spring,summer and winter,and that between chlorophyll-a and water temperature was positive in summer.The correlation between chlorophyll-a and total phosphorus was positive,and that between chlorophyll-a and total nitrogen was complex.The concentration of chlorophyll-a indicated that Hongfeng Reservior had reached an eutrophic state.

关 键 词：红枫湖水库 叶绿素A 环境因子 相关性 

分 类 号：X524[环境科学与工程—环境工程]