【摘要】 根据 1998年夏季对珠江河口及附近海域的水质调查 ,研究了氮的各种化学形式的空间分布特征、相关系数和环境条件的影响。结果表明 :珠江河口中 ,无机氮含量很高 ,占总氮的 85 % ;而硝酸氮占无机氮的 95 % ,NO-2 N和NH+ 4 N含量很低。在外海 ,则以有机氮为主 ,占总氮的 80 %。NH+ 4 N和NO-2 N在伶仃洋河口中部出现最大值 ,在外海的值最小 ;其它形式的氮从伶仃洋内河口到外海 ,其浓度都逐渐降低。NO-3 N是各种形式氮中的主要因素 ,它与各形式氮之间具有良好的相关性 ;NH+ 4 N和NO-2 N与其它形式氮之间的相关性都很差 ,而其余各种形式氮之间都有较好的相关性。涨潮时不利于污染物的扩散 ;与小潮相比 ,大潮时伶仃洋河口中部表层氮的浓度偏高更多还原

【Abstract】 Based on the investigation of waterqualityinthePearlRiverestuaryanditsadjacentseaareasinthesummerof 1998,thispaperstudiesthespacedistributioncharacteristics ,correlationbetweenchemicalspeciesofnitrogenand theimpactofenvironmentalcondition .Theresultshows :inthePearlRiverestuary ,thecontentofINishighand takesupthe 85 %ofTN ;whileNO-3 Ntakesupthe 95 %ofINandthecontentofNO-2 NandNH+ 4 Nislittle . Initsadjacentseaareas .TNismainlycomposedofOrg N .ThemaximumoftheNO-2 NandNH+ 4 Nappearsin themiddleoftheestuaryandtheminimuminitsadjacentseaareas ;andconcentrationsofotherspeciesofNde creasegreatlyfromthenorthtothesouth .NO-3 NistheprincipalfactoramongallsortsofspeciesofNandhas goodcorrelationbetweenthem .NO-2 NandNH+ 4 NhavelowcorrelationsbetweenotherspeciesofN ,whichhave agoodcorrelationbetweenthemselves.The fluxisagainst the diffusion of pollution .The concentration of Nin the sur face during the spring tide is greater than that during the neap tide .更多还原