大辽河感潮河段及近岸河口氮、磷的分布及潜在性富营养化  

Distribution of Nitrogen and Phosphorus in the Tidal Reach and Estuary of the Daliao River and Analysis of Potential Eutrophication

作　　者：张雷[1,2] 曹伟[1,2] 马迎群[1,2] 韩超南[1,2] 秦延文[1,2] 赵艳民[1,2] 刘志超[1,2] 杨晨晨[1,2] 

机构地区：[1]中国环境科学研究院环境基准与风险评估国家重点实验室,北京100012 [2]中国环境科学研究院水环境研究所,环境保护河口与海岸带环境重点实验室,北京100012

出　　处：《环境科学》2016年第5期1677-1684,共8页Environmental Science

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07503-002)

摘　　要：根据2013年8月和11月大辽河感潮河段及近岸河口区水质的实测数据,对水体中不同形态氮、磷含量的季节和空间分布特征进行了研究,并对水体潜在性富营养化程度进行了评价.结果表明,2013年丰水期和枯水期,从大辽河感潮河段至近岸河口区,硝酸盐是水体无机氮存在的主要形态,其约占总无机氮的55%;颗粒态磷(TPP-P)是水体磷营养盐的主要存在形式,其含量占水体磷营养盐的50%以上.空间上,从大辽河感潮河段至近岸河口区,水体的氮、磷形态的浓度表现为逐渐降低的趋势,相关性分析结果显示,水体大多数氮、磷形态与盐度呈显著的负相关关系,说明海水物理稀释相比其它环境因子对水体氮、磷形态空间分布起着主要作用;季节上,大辽河感潮河段及近岸河口区水体氮、磷含量表现为"枯水期>丰水期",这主要与感潮河段季节性陆源输入情况不同有关.大辽河感潮河段及近岸河口区水体DIN-N浓度均大于0.30 mg·L^(-1),N/P大于60,均表现为磷限制潜在富营养化水平.Based on the monitoring data in the tidal reach and estuary of the Daliao river in August and November,2013,the seasonal and spatial distribution of the nitrogen and phosphorus forms were studied,and the degree of eutrophication was evaluated. The results showed that nitrate nitrogen was the main chemical species and occupied about fifty-five percent of inorganic nitrogen,and the particulate phosphorus was the main chemical species and occupied about fifty percent of total phosphorus in the tidal reach and estuary of the Daliao river in wet and dry seasons,2013. The concentrations of nitrogen and phosphorus nutrients decreased in the direction from tidal reach to estuary of the Daliao river. Correlation analysis showed that there was a significant negative correlation between the nitrogen and phosphorus forms and salinity in most of the water body,which illustrated that physical dilution of seawater played a major role in the spatial distribution of nitrogen and phosphorus forms. The concentrations of nitrogen and phosphorus nutrients in the dry season were higher than those in the wet season,this was mainly related to the seasonal terrestrial input of the tidal reach. The concentration of the dissolved inorganic nitrogen was higher than 0. 30 mg·L^（-1）,and the value of N/P was higher than 60,which indicated that PO^（3-）4-P was the nutrient limiting phytoplankton growth in the tidal reach and estuary of the Daliao river in August and November,2013.

关 键 词：大辽河感潮河段及河口区 氮磷 空间分布 时间分布 富营养化 

分 类 号：X52[环境科学与工程—环境工程]