Shenzhen Yuanqing Environmental Technology Service Company Limited, Shenzhen 518057, China;National Marine Environment Monitoring Center, Dalian 116023, China
Abstract: pH, salinity, and levels of dissolved oxygen(DO), chemical oxygen demand(CODMn), active phosphate(DIP), nitrite nitrogen(NO-2-N), nitrate nitrogen(NO-3-N), ammonia nitrogen(NH3-N), total nitrogen(TN), total phosphorus(TP) and chlorophyll a(Chl-a) were monitored in coastal waters sampled from 20 sampling sites near Pearl River estuary from July to September, 2016, and the quality and eutrophication of the seawater were assessed by organic pollution index and nutrient quality index(NQI), and by main factors from principal component analysis. It was found that nutrient pollution in the Pearl River estuary sea area was become worse, with inorganic nitrogen content ranging from 1.32 mg/L to 4.31 mg/L, on average of 2.12 mg/L. The contents of active phosphate were varied from 0.05 mg/L to 0.39 mg/L, with average of 0.11 mg/L, indicating that COD and DIP levels in all the sampling stations were graded as Ⅳ below;nitrate nitrogen was the most prevalent inorganic nitrogen, followed by ammonia nitrogen, and the minimal nitrite nitrogen. Organic pollution index and NQI revealed that the waters were within the eutrophication level, with the spatial distribution of a trend of gradually decreasing from the Maozhou River estuary to the south. The principal component analysis indicated that DIP, DIN, and CODMnwere the main factors impacting the eutrophication of the seawater. The findings showed that the water quality was poor and future improved in coastal water of Pearl River estuary.
党二莎, 唐俊逸, 周连宁, 叶超, 鲍晨光. 珠江口近岸海域水质状况评价及富营养化分析[J]. 大连海洋大学学报, 2019, 34(4): 580-587.
DANG Er-sha, TANG Jun-yi, ZHOU Lian-ning, YE Chao, BAO Chen-guang. Water quality assessment and eutrophication analysis in coastal waters of Pearl River estuary. Journal of Dalian Ocean University, 2019, 34(4): 580-587.
2019, Vol. 34 
