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1、內(nèi)蒙古農(nóng)業(yè)大學(xué)2016級學(xué)士學(xué)位畢業(yè)論文摘要本科生畢業(yè)論文學(xué)院水利與土木建筑工程學(xué)院論文題目大河口水庫表層沉積物氮、磷分布特征及釋放規(guī)律分析學(xué)生姓名學(xué)號專業(yè)環(huán)境工程年級12級指導(dǎo)教師職稱實驗師、教授內(nèi)蒙古農(nóng)業(yè)大學(xué)教務(wù)處制2016年6月摘要本文以位于內(nèi)蒙古錫林郭勒盟多倫縣境內(nèi)的沙源區(qū)水庫-大河口水庫表層沉積物為研究對象,采用野外采樣,室內(nèi)實驗分析的方法對大河口水庫表層沉積物氮、磷的時空分布特征以及同期上覆水體的富營養(yǎng)化狀態(tài)進行了分析;并通過室內(nèi)模擬實驗,探討了當(dāng)環(huán)境因子(pH值、DO、溫度)變化時內(nèi)源
2、營養(yǎng)鹽釋放對上覆水體水質(zhì)的影響。結(jié)果表明:(1)大河口水庫表層沉積物類型以砂質(zhì)壤土為主,其次有粉砂質(zhì)壤土、壤質(zhì)砂土;上覆水體總體為國家五類水質(zhì)標(biāo)準(zhǔn),水庫總體呈現(xiàn)富營養(yǎng)化狀態(tài)。(2)表層底泥總氮、總磷季節(jié)分布特征呈現(xiàn)冬季春季含量較低,夏季秋季含量較高的特點,從空間分布來看,水庫東南部氮、磷含量高于西北部;水庫表層沉積物氮磷比值為1:1.53。(3)水庫底泥的溫度越高,pH值越顯弱堿性以及溶解氧含量越低時,其N、P釋放強度越強。本次研究為以后大河口水庫的治理、修復(fù)、保護與管理提供了數(shù)據(jù)支撐,也為社會各界
3、提供了高原寒旱區(qū)湖泊水庫表層沉積物研究的一些數(shù)據(jù)與心得。關(guān)鍵字:大河口水庫表層沉積物總氮總磷營養(yǎng)鹽釋放。DistributionandreleaseofnitrogenandphosphorusinsurfacesedimentsoftheRicerEstuaryAbstractInthispaper,XilinGolLeagueinInnerMongoliaDuolundomesticsandsourceareaReservoir-Reservoirlargeestuarysurfacesedim
4、entsastheresearchobject,throughthereservoirsurfacesedimentsofnitrogenandphosphorusanalysisofthespatialandtemporalcharacteristics.Thearticleusesthefieldsampling,laboratoryexperimentsanalysismethodforlargeestuarinereservoirsurfacesedimentsofnitrogenandph
5、osphorustooverlyingtemporaldistributioncharacteristicsofthewaterbodyeutrophicationoverthesameperiodwereanalyzed.Andthroughtheindoorsimulationexperimentstostudytheeffectswhenenvironmentalfactors(pHvalue,DOtemperature)changesinwaterqualityoftheoverlyingi
6、nnersourcenutrientreleaseright.Theresultsshow:(1)largeestuarinereservoirsurfacesedimenttypesandsandyloam,followedbyasiltyloam,loamysand;overlyingwaterbodyoverallnationalGradeIIIstandards;andslightoverallreservoirlakes(reservoirs)richeutrophication.(2)o
7、fTNandTPinsurfacesedimentsseasonaldistributionofcontentpresentedlowwinterspring,summerandautumnhigherlevels,thespatialdistribution,thereservoirishigherthantheconcentrationinthenorthwestsoutheastofspatialconcentrationdistribution;nitrogenandphosphorusra
8、tioof1:1.53,theratioissmall,indicatingalowerdegreeofrichreservoirofthecamp.(3)Thehigherthetemperatureofthereservoirsediment,pHvalue,themoresignificantthehighertheweakacidanddissolvedoxygencontent,itsN,Preleasestrengthisstronger.Thestudy