丰水期环太湖河流与湖区水质比较研究  

Water Quality Comparison Between Lake Taihu and Contribute River During High Water-level Period

作　　者：高永霞[1] 蔡琳琳[2] 赵林林[3] 朱广伟[2] 

机构地区：[1]南京信息工程大学环境科学与工程学院,南京210044 [2]中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室,南京210008 [3]河海大学水文水资源学院,南京210098

出　　处：《环境科学》2011年第10期2840-2848,共9页Environmental Science

基　　金：中国科学院知识创新工程重大交叉项目(KZCX1-YW-14);国家水体污染控制与治理科技重大专项(2009ZX07101-013);中国科学院知识创新工程重要方向项目(KZCX2-YW-419);南京信息工程大学科研基金项目

摘　　要：鉴于环湖河流水质在汛期对太湖的关键性影响,以藻类对不同形态营养盐的利用程度为标准,2008年丰水期对太湖周边32条主要河流的水质进行了细化研究,旨在为太湖的外源河流综合整治提供依据.结果表明,采样河流中望虞河水体的营养盐和悬浮物(SS)浓度都居于最高,水质为劣Ⅴ类;太湖北部河流水体除了营养盐浓度为劣Ⅴ类外,有机质污染在环湖河流中最为严重,北部河流水体可酶解磷(EHP)的平均浓度达到了0.240 mg/L,占总磷的62.4%,位居首位;太湖西部河流显著的特点是亚硝态氮(NO 2--N)浓度异常高,平均浓度达到了0.270 mg/L,是环湖其它河流的2～3倍.太湖北部入湖河流的氮、磷、有机质浓度都明显高于北部湖区,太湖西部入湖河流主要是氮浓度明显高于对应湖区.河流与湖区的氮磷比(TN/TP)表明藻类和沉积物再悬浮对水体的磷含量影响很大.Thirty-two main rivers around Lake Taihu were sampled during high water period in 2008 to investigate river＇s vital impact on Lake water quality.Different forms of nitrogen and phosphorus were analyzed for the 32 river water samples according to nutrients function to algae.The aim of this study is to provide the basic information for river rehabilitation.Based on the results,the nutrients and suspended substance（SS） concentrations of Wangyu River were the highest,its water quality was below theⅤ grade（Chinese water quality criterion）.Water quality of northern rivers was also below the Ⅴ grade,organic matter and enzymatically hydrolysable phosphate（EHP） concentration were the highest.The EHP concentration was 0.240 mg/L,and accounted for 62.4% of total phosphorus（TP）.Nitrite nitrogen（NO-2-N） concentration was exceptionally high in western rivers and the average concentration was 0.270 mg/L,it was 2-3 times higher than that of other rivers.The northern rivers＇ nitrogen,phosphorus and organic concentration were markedly higher than those in the north Lake region,while the western rivers＇ nitrogen was markedly higher than that in the west Lake region.It can also be concluded that algae and suspended sediment were able to bring more phosphorus to water by comparing the ratio of total nitrogen（TN） and TP in these rivers and Lake Taihu.

关 键 词：太湖 河流 丰水期 营养盐 水质 

分 类 号：X131.2[环境科学与工程—环境科学]