黄海北部河口海域无机氮含量的分布动态与环境质量评价  

Distribution dynamics of the inorganic nitrogen and assessment of ambient water quality at the estuary seawaters in North Yellow Sea

作　　者：王年斌[1] 马志强[1] 薛克[1] 周遵春[1] 宛立[1] 

机构地区：[1]辽宁省海洋水产研究所辽宁省应用海洋生物技术开放实验室,辽宁大连116023

出　　处：《大连水产学院学报》2003年第4期282-286,共5页Journal of Dalian Fisheries University

基　　金：国家攻关计划资助项目(2001BA603B-06-02-3)

摘　　要：1999～2000年间,对黄海北部重要江河入海口海域无机氮的连续监测分析表明,入海径流是该海区无机氮的主要来源,5、7月份是江河等陆源排放无机氮的高峰期,秋季下降,沿岸的降水将推迟下降的时间。无机氮的总体分布趋势以鸭绿江口最高,自东向西递减,鸭绿江口、椅圈、大洋河口和庄河口最高值分别为0 561、0 476、0 410、0 494mg/L,分别超四类和达四类海水水质标准。椅圈、碧流河口亚硝酸氮最高含量分别为0 108和0 265mg/L,已经超过了溯河鱼类健康生长的阈值。Monitoring of the inorganic nitrogen levels was carried out at the estuary in North Yellow Sea from 1999 to 2000. The results showed that the inorganic nitrogen to the estuary seawater primarily derived from riverine discharges, terrestrial sources, which were peak on May or on July per year, and decreased in autumn. Rainfall can delay the occurrence of the decrease in the inorganic nitrogen to the estuary seawater. The inorganic nitrogen levels in the estuaries of Yalujiang river, near Yiquan, Dayang river, and Zhuanghe river were 0.561, 0.476, 0.410 mg/L and 0.494 mg/L, respectively, which were higher than the criterion of fourth-class seawater. The highest content of the nitrites in the seawaters near Yiquan and the estuaries of Biliu river were 0.108 mg/L and 0.265 mg/L, over the threshold values of healthy fisheries.

关 键 词：无机氮 黄海北部 河口海域 环境质量 

分 类 号：X132[环境科学与工程—环境科学]