溶解氧对湖库热分层和富营养化的响应——以枣庄周村水库为例
- 海之魂
-
0 次阅读
-
0 次下载
-
2020-03-17 10:57:59
文档简介:
中国环境科学2016,36(5):1547-1553ChinaEnvironmentalScience溶解氧对湖库热分层和富营养化的响应以枣庄周村水库为例邱晓鹏,黄廷林,曾明正(西安建筑科技大学环境与市政工程学院,陕西西安710055)摘要:为研究热分层和富营养化对湖库溶解氧变化特征的影响,于2014年1月~12月对周村水库水温、溶解氧、叶绿素以及初级生产力的季节变化及垂向分布进行了监测.结果表明:水温和溶解氧的分层期均为4~l1月份;分层期叶绿素在2O~50ttg/L之间,初级生产力为2.16~2.23gO2/(m3.d),光补偿点在l~3m之间;恒温层在5月中旬进入厌氧状态;由于光补偿点位置较高,5~8月份氧跃层位置为1~6m,高于温跃层上界面;而氧跃层位置偏高造成溶解氧在垂向上的极值一般在表层,且变温层溶解氧浓度梯度较大;9~11月份温跃层的下移使得氧跃层和厌氧区界面同时下移,厌氧区界面与温跃层上界面的位置变化始终同步,而氧跃层受水体耗氧作用的影响在热分层结构相对稳定时会再次上移.热分层和水体富营养化均对溶解氧的浓度和分布有重要的影响.关键词:温跃层;光补偿点;初级生产力;氧跃层中图分类号:X524,TV697.2文献标识码:A文章编号:1000—6923(2016)05—1547—07Responsesofdissolvedoxygenonthermalstratificationandeutrophicationinlakesandreservoirs-AnexampleinZhoucunReservoirinZaozhuangCity.QIUXiao-peng,HUANGTing—lin’,ZENGMing-zheng(SchoolofEnvironmentalandMunicipalEngineering,Xi’anUniversityofArchitectureandTechnology,Xi’an710055,China).ChinaEnvironmentalScience,2016,36(5):1547~1553Abstract:Toinvestigatetheefectsofthermalstratificationandeutrophicationondissolvedoxygen,seasonalvariationsandverticaldistributionofwatertemperature,dissolvedoxygen,chlorophyllaandprimaryproductionweremonitoredfromJanuary2014toDecember2014intheZhoucunReservoir.TheresultsshowedthatwatertemperatureanddissolvedoxygenbothexperiencedstratificationfromApriltoNovember.Thechlorophyllawas20~50og/L,theprimaryproductivitywas2.16~2.23g02/(m·d1andthepositionoflightcompensationpointwasbetweenlmand3mduringstratification.Thehypolimnionhasbeeninanaerobicconditionsincemid-May.Becauseofthehighpositionoflightcompensationpoint,theoxycline’Spositionwasbetweenlmand6mduringstratification,higherthanthermocline’S.Themaximumvalueofdissolvedoxygenwasusuallyatthesurfacesincethepositionofoxyclinewashighandthedissolvedoxygengradientwaslargeintheempilimnion.TheverticalmigrationofthermoclinemadeoxyclineandanaerobiczoneinterfacebothmoveddownbetweenSeptemberandNovember.Theanaerobiczoneinterface’positionwasalwaysthesameasthermocline’S,whiletheoxyclinewouldmoveupagainwhenthethermalstructurewasrelativelystable.Thethermalstratificationandeu
评论
发表评论