Dai Ji-cui, Gao Xiao-wei, Ni Jin-ren, Yin Kui-hao
Shenzhen Graduate School, Peking University, Shenzhen 518055, China.
Huan Jing Ke Xue. 2009 Oct 15;30(10):2879-83.
Based on the field data of Shenzhen coastal water quality in 2002-2007, variation characteristics of nutrients including NH4+ -N, NO3- -N, NO2- -N, PO4(3-) -P and DIN were presented. And the correlationships between nutrients and pH, salinity were also investigated. Furthermore, eutrophication index (E), organic pollution index (A) and potential eutrophication were employed to assess the eutrophication degree of Shenzhen coastal waters. Results show that the nutrient levels of east coast are higher than that of west coast. And the peak year of nutrients are 2002 and 2006. The average concentrations of PO4(3-) -P and DIN are 0.007 mg/L and 0.078 mg/L for Shenzhen east coast while 0.090 mg/L and 1.544 mg/L for west coast. Nutrients in Shenzhen coastal waters have negative correlations with pH and salinity. The N/P ratios are all far more than 16 indicating that Shenzhen coast belongs to seriously P-limiting water. Eutrophication degree of Shenzhen east coast is far lower than that of west coast, and the average eutrophication index of east coast is 0.11 while 42.15 for west coast. Furthermore, west coast is classified as P-limiting moderate level potential eutrophication area and even as P-limiting potential eutrophication level.
基于2002—2007年深圳近岸水质的实测数据，分析了深圳近岸海水中NH4+ -N、NO3- -N、NO2- -N、PO4(3-) -P和DIN等营养盐的变化特征，并探讨了营养盐与pH值、盐度的相关性。此外，采用富营养化指数（E）、有机污染指数（A）和潜在富营养化程度对深圳近岸海域的富营养化状况进行评价。结果表明，深圳近岸海域东部营养盐水平高于西部，2002年和2006年是营养盐含量的高峰年。深圳东部近岸PO4(3-) -P和DIN的平均浓度分别为0.007 mg/L和0.078 mg/L，西部近岸则分别为0.090 mg/L和1.544 mg/L。深圳近岸海域营养盐与pH值和盐度呈负相关，N/P比均远大于16，表明深圳近岸海域属于严重缺磷水体。深圳近岸海域东部富营养化程度远低于西部，东部近岸平均富营养化指数为0.11，西部近岸为42.15。此外，深圳西部近岸海域属于磷限制型中度潜在富营养化区域，甚至达到磷限制型潜在富营养化水平。
