摘要
利用营养状态下卡森指数和综合营养状态指数对上海市大莲湖生态修复区的富营养状况进行了检测与评价。结果表明,各监测点水体均达到富营养化水平。大莲湖富营养化主要影响因子氮磷的输入输出状况为:氮输入总量2 174kg/a,约占总量的92%;磷输入总量466.27kg/a,约占总量的97%;氮磷的主要来源为上游外源水;氮磷输出量分别为1 963和352.1kg/a,截留率分别为9%和24%。因此,大莲湖生态修复区内水质虽然得到明显改善,但各项水质指标要达到地表水Ⅱ类标准,还需要控制上游水源的污染物入湖负荷。
The assessmentwas conducted on the lake eutrophication in the Dalian Lake ecological restoration region using Garlson model and comprehensive trophic status index. The results revealed that the water at all monitoring sites are eutrophic and the main factors are nitrogen and phosphorous. The balance of nitrogen and phosphorous was poor with the total N input of 2 174 kg/a, 92% of the total N content, and the total P input of 466.27 kg/a, 97% of the total P content, which mainly come from the upper-stream, while the out- puts of N and P are 1 963 and 352.1 kg/a, respectively, showing that the rates of retained N and P was 9% and 24 %, respectively. Although the water quality of Dalian Lake ecological restoration region has been sig- nificantly improved, some measures still need to be taken to decrease the input of N andP from the upper- stream in order to reach the standard Ⅱ of the surface water.
出处
《水土保持通报》
CSCD
北大核心
2013年第6期157-160,共4页
Bulletin of Soil and Water Conservation
基金
农业部
财政部"十二五国家大宗淡水鱼类产业技术体系"(nycytx-9-12)
上海市科学技术委员会资助(08DZ1203201
08DZ1203203)
关键词
生态修复区
富营养化
氮磷平衡
ecological restoration region
eutrophication
balance of nitrogen and phosphosous
