关键词: 近岸海域, 福建, 氮, 磷, 时空变化, nearshore area, Fujian Province, nitrogen, phosphorus, spatial and temporal changes

Abstract: 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.