福建省近岸海域水体氮磷时空分布特征

The spatial-temporal distribution of the nitrogen and phosphorus in the nearshore area of Fujian Province

基于2015至2017三年的福建省近岸海域丰水期、平水期、枯水期海水水质监测信息,选取无机氮和活性磷酸盐为研究因子,统计福建省近岸海域2015—2017年氮磷污染的时空变化规律。结果表明:1)福建省附近东海南部海域水质总体较好,无机氮及活性磷酸盐各监测站位三年平均浓度分别为0.30 mg/L和0.02 mg/L;2)相较于丰水期和平水期,枯水期无机氮和活性磷酸盐浓度明显较高;3)厦门市、宁德市附近海域无机氮和活性磷酸盐浓度较高,主要是受地形以及周边陆域污染的影响。

The eutrophication of coastal waters has been the focus of domestic and foreign scholars.Based on the monitoring information of water quality in the nearshore area of Fujian Province during the different periods from 2015 to 2017,the spatial and temporal distribution of the nitrogen and phosphorus were researched.According to the law of spatial and temporal changes,the causes of eutrophication were also studied.Results indicated as follows:1)The water quality in the nearshore area of Fujian Province was generally good,and the concentrations of inorganic nitrogen and active phosphate in most areas reached the seawater quality standard.2)The concentrations of inorganic nitrogen and active phosphate were higher in dry season than in wet season.3)The concentrations of inorganic nitrogen and active phosphate in the sea area around Xiamen City and Ningde City were relatively high due to the typical topography and the human activities,such as fertilizer and manure use,fossil fuel consumption,and wastewater discharge.This research would provide scientific basis for the environmental management and protection in the nearshore area of Fujian Province.