东平湖冬季水体营养盐污染特征及水质评价  

Characterization of Nutrient Pollutants of Dongping Lake Winter Water and its Quality Assessment

作　　者：罗文磊[1] 田娟[1] 张菊[2] 陈影影[3] 陈诗越[1,2] 

机构地区：[1]江苏师范大学城市与环境学院,江苏徐州221116 [2]聊城大学环境与规划学院,山东聊城252059 [3]南京大学地理与海洋科学学院,江苏南京210023

出　　处：《海洋湖沼通报》2016年第2期8-16,共9页Transactions of Oceanology and Limnology

基　　金：国家自然科学基金项目(41072258;41401563);江苏师范大学博士启动金(14XLR021)资助

摘　　要：东平湖是南水北调东线关键调蓄湖,其水质状况直接影响调水水质安全。考虑到冬季是调水的主要季节,课题组特于2011年12月份采集了东平湖33个点的水样,测定了营养盐的浓度以及主要水化学指标,以了解东平湖水体营养盐的污染特征和水质状况。研究表明,东平湖TN、TP平均含量分别为0~3.7mg/L、0.009~0.269mg/L,无机氮的含量大小依次为NO_3^--N>NH_4^+-N>NO_2^--N;东平湖湖泊的矿化度等水化学指标浓度存在一定差异,主要离子是Mg^(2+)-Ca^(2+)-Na^+-SO_4^(2+)-Cl^--HCO_3^-,水型为硫酸盐类-镁组-II型水;根据单因子法水质评价结果,东平湖水质情况已不容乐观,33处样点中有10个水质属于劣V类,7个样点的水质属于V类,主要是因为TN、TP含量超标,因此为了确保调水水质安全,需进一步加大区域及东平湖水质治理力度。Dongping Lake is an important regulator of the eastern route of south-to-north water diver- sion project of China, thus the assurance of its water quality is of extruding importance. To characterize the distribution and extent of nutrient pollutants of Dongping Lake and unveil the relationship among pollutants, local economic development and human activities, 33 representative water samples were taken and analyzed. The results showed that （1） the content of TN, TP ranged from 0 to 3.7mg/L and from 0. 009 to 0. 269 mg/L, respectively; （2） the content of inorganic nitrogen followed an order of NO3-〉N 〉NH4＋ -〉N 〉 NO2-N; （3） the concentration of a set of chemical ions was different among samples with the majors arranged from high to low as Mg2＋- Ca2＋- Na＋- SO4^2 -- Cl -- HCO3- ; and （4） the type o[ Dongping Lake winter water was SO42- -- Na＋ In addition, the water quality was not the wished as 10 samples were below the Class V standard, and 7 met the Class V standard. It was found that the content of TN and TPwas higher than the standardized. The water quality supervision should be strengthened.

关 键 词：营养盐 水化学特征 水质评价 冬季 东平湖 

分 类 号：X824[环境科学与工程—环境工程]