【摘要】 针对茂名市近海海域遭到越来越严重的污染、使海域环境质量明显下降的实际情况,对茂名水东湾海水养殖功能区进行了定点定时的海水水质监测。选用COD、BOD5、DO、氰化物、无机氮、无机磷、油类、总铬、硫化物为主要评价指标。并采用单项指标标准指数评价、综合指数评价和水体富营养化评价等一系列的评价方法进行了其环境质量评价。结果表明,茂名水东湾养殖功能区除总铬和BOD5两项指标外,其他指标均已超出国家海水水质一类标准,其中氰化物、无机磷(DIP)、无机氮(DIN)、油类、硫化物超出国家二类水体标准。COD超出国家三类水体标准;另外,水体已属超营养型;总体水环境质量为中度污染;而且污染指数上升趋势明显;前景不容乐观。更多还原

【Abstract】 TheinshorefisheryareaofMaomingcityhasbeenencounteredmoreandmoreseriouspollution,whichmakestheenvironmentalqualityoffisheryareadropobviouslyinrecentyears.SomemonitoringhasbeendonefortheseawaterfisheryfunctiondistrictintheShuidonggulfofMaomingcity.Someappraisalsmethodsaboutindividualindexappraisal,whichcomposedofindexappraisalandeutrophicationappraisalofwaterbody,havebeenadoptedheretoappraisetheenvironmentalindexincludingCOD,BOD5,DO,cyanide,inorganicnitrogen,inorganicphosphorus,oil,totalchromiumandsulfideetc..Theresultshowsthat,exceptfortotalchromiumandBOD5indexes,otherindexeshavealreadygonebeyondthefirstkindofnationalseawaterstandard,ofwhichcyanide,inorganicphosphorus(DIP),inorganicnitrogen(DIN),oil,andsulphidehaveoversteppedthesecondkindofnationalseawaterstandard,CODhasoversteppedthirdstandard.Inaddition,thewaterbodyhasalreadybeeneutrophicated;itsenvironmentalqualityreachesmiddledegreepollution;andtheascendanttrendofpollutionindexisveryobvious.SotheprospectofseawaterfisheryfunctiondistrictinShuidongGulfofMaomingisnotoptimistic.更多还原