CAJ | 학술논문

根据2004—2012年在渤海湾进行的连续监测结果，分析、探讨了渤海湾近年来营养盐的变化特征及富营养化概况．结果表明：近年来，渤海湾海水中 DIN 含量升高，DIP 含量有所降低，与1978—1980年相比，DIN 增加1.18倍，DIP降低62.1%；从空间分布上看，北塘和汉沽断面的营养盐含量高于其他断面；从时间分布上看，枯水期的营养盐含量低于丰水期；从无机氮的结构特征上看，NO3-N 占无机氮含量的40.4%～81.5%，三态无机氮之间基本处于热力学平衡状态；从 N/P 比值、Si/N 比值和 Si/P 比值上看，近年来渤海湾 N/P 比值升高，该海域已由原来的高磷低氮转换为低磷高氮的状态；富营养化评价结果是，2008—2012年渤海湾近岸海域 NQI 指数变化范围为3.24～4.28，平均值为3.71，全部处于富营养化状态．
근거2004—2012년재발해만진행적련속감측결과，분석、탐토료발해만근년래영양염적변화특정급부영양화개황．결과표명：근년래，발해만해수중 DIN 함량승고，DIP 함량유소강저，여1978—1980년상비，DIN 증가1.18배，DIP강저62.1%；종공간분포상간，북당화한고단면적영양염함량고우기타단면；종시간분포상간，고수기적영양염함량저우봉수기；종무궤담적결구특정상간，NO3-N 점무궤담함량적40.4%～81.5%，삼태무궤담지간기본처우열역학평형상태；종 N/P 비치、Si/N 비치화 Si/P 비치상간，근년래발해만 N/P 비치승고，해해역이유원래적고린저담전환위저린고담적상태；부영양화평개결과시，2008—2012년발해만근안해역 NQI 지수변화범위위3.24～4.28，평균치위3.71，전부처우부영양화상태．
Variation characteristics of nutrients and eutrophication overview of Bohai Bay in Tianjin were analyzed in ac-cordance with the results of the continuous monitoring carried out from 2004 to 2012 in Bohai Bay. The results showed that the DIN content increased while the DIP content decreased in recent years in Bohai Bay.Compared with the data in 1978 and 1980,DIN increased 1.18 times and DIP decreased 62.1%.From the spatial distribution point of view,the nutrient contents in the waters of Beitang and Hangu sections were higher than those in other sections.From temporal distribution point of view,the nutrient contents in the wet period were lower than those in the dry season. The structural characteristics of the inorganic nitrogen show that NO3-N makes up 40.4%to 81.5%of the inorganic nitrogen which was basically in a state of thermodynamic equilibrium. As to the N/P,Si/N and Si/P ratios,N/P ratio increased and the waters changed from the status of high phosphorus low nitrogen to low phosphorus and high nitrogen in recent years in Bohai Bay. The results of eutrophica-tion assessment showed that the NQI index range was from 3.24 to 4.28,with an average of 3.71,and all the waters were in the state of eutrophication from 2008 to 2012 in Bohai Bay.