發(fā)布時間：2018-04-12 10:03

  本文選題：杭州灣北部近岸水域 + 水化學因子　； 參考：《大連海洋大學學報》2017年06期

【摘要】：為了解杭州灣北部近岸水域水化學狀況及其污染程度,利用2011—2015年間對杭州灣北部近岸水域春、夏季9個水化學因子的調(diào)查結(jié)果,分析了該水域水化因子的變化特征、相關(guān)性及氮磷營養(yǎng)鹽結(jié)構(gòu)特征,并采用潛在性富營養(yǎng)化法和有機污染指數(shù)法,進行了該水域潛在性富營養(yǎng)化程度及污染狀況的評價。結(jié)果表明:調(diào)查期間,杭州灣北部近岸水域,2011—2015年春、夏季pH平均值分別為8.05±0.11和7.96±0.27;春、夏季DO平均值分別為(8.13±0.33)、(7.42±0.31)mg/L,DO飽和度均在88%以上;受潮汐、徑流和降水影響,鹽度波動范圍較大,春、夏季鹽度平均值分別為11.67±5.60和12.06±3.28;春、夏季CODMn平均值均小于3 mg/L,符合《海水水質(zhì)標準》二類水質(zhì)標準;總氨氮(TAN)、NO-2-N含量均維持在較低狀態(tài),符合《漁業(yè)水質(zhì)標準》及經(jīng)濟魚蝦類生長安全濃度的要求;三態(tài)氮含量依次為NO-3-NTANNO-2-N,NO-3-N占DIN的69%~97%;pH與氮磷營養(yǎng)鹽均為負相關(guān),氮、磷間均呈正相關(guān);潛在性富營養(yǎng)化法計算結(jié)果表明,2011—2014年春季,調(diào)查水域營養(yǎng)級均為ⅥP,2014年夏季—2015年,N/P值明顯下降,營養(yǎng)級過渡到ⅤP,調(diào)查水域受磷限制富營養(yǎng)化程度有所降低;采用海水水質(zhì)一類標準評價,5年所有站位有機污染指數(shù)A值均大于4,達到嚴重污染程度。研究表明,杭州灣北部近岸水域有機污染嚴重,亟待有效控制與科學管理。
[Abstract]:In order to understand the hydrochemical status and pollution degree of the coastal waters in the northern part of Hangzhou Bay, nine hydrochemical factors were investigated in spring and summer in the northern part of Hangzhou Bay from 2011 to 2015, and the variation characteristics of the hydrochemical factors were analyzed.The correlation and the structural characteristics of nitrogen and phosphorus nutrients were analyzed. The potential eutrophication degree and pollution status were evaluated by using the latent eutrophication method and organic pollution index method.The average value of salinity in spring and summer was 11.67 鹵5.60 and 12.06 鹵3.28 respectively, the average value of CODMn in spring and summer was less than 3 mg / L, which was in accordance with the second class of water quality standard, and the content of total ammonia nitrogen (TANN) NO-2-N was kept in a lower state.The results of latent eutrophication method showed that in the spring of 2011-2014, the nutritional grade of the investigated waters was 鈪，

本文編號：1739273