摘要
根据2009年8月、2010年5月和9月3个航次的监测数据,探讨了小清河口水质污染程度及富营养化状况。结果表明:小清河口水体污染严重,DO%平均值小于80%,其中盐度小于10的区域仅为40%;DIN平均值7.00mg/L,超过二类海水标准的23倍,CODMn平均值为7.98mg/L,是二类海水标准的2.6倍。亚硝酸盐浓度偏高,平均值大于0.1mg/L,最高值达0.55mg/L。易降解有机物占总有机物的比例为30%左右。综合营养状态指数法(TLI)评价显示,小清河口盐度小于15的水体TLI值大于70,处于重度富营养级,盐度15～25之间仍为中度至轻度富营养水平。因此小清河口污染治理十分迫切,应从源头加强对小清河口污染物排放的控制。
Based on the monitoring data from three surveys in Aug. 2009, May. 2010 and Sep. 2010, the current situation of water pollution and eutrophication status in the Xiaoqing River Estuary were analyzed. The condusi0n showed that the water was highly polluted. The average status of DO% in the estuary was less than 80% and even below 40% with salinity smaller than 10. Average concentrations of DIN and CODMn in the investigated area were 7. 00 mg/L and 7. 98mg/L, which were about 23 times and 2.6 times of the limitation of the National Seawater Quality Standard Rank 2, respectively. The average ni- trite concentration in the estuary water was above 0. lmg/L and the maximum reached 0. 55mg/L, which was relatively high ~ecith respect to the natural waters. Easily degradable organic carbon occupied about 30% share of the total organic carbon. In this paper, TLI method was used to analyze the eutrophication status and the results showed that with salinity below 10, TLI of the estuary water was larger than 70 and the degree of eutrophication reached the highest level-hyper eutropher and when salinity ranged from 15 to 25, the eutrophication degree was between the middle eutropher and the light eutropher. Therefore, the treatment for the water pollution in the Xiaoqing River Estuary was urgent, and the source control of pol- lutant emissions had become a priority.
出处
《中国海洋大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第2期60-66,共7页
Periodical of Ocean University of China
基金
山东省科技攻关项目(2007GG10005013)
海洋公益性专项(201005009)资助
关键词
小清河口
无机氮
有机污染
富营养化
Xiaoqing River Estuary
inorganic nitrogen
organic pollution
eutrophication
