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1、乌梁素海流域农田面源污染研究农业环境科学2007,26(1):41—44JournalofAgro—EnvironmentScience乌梁素海流域农田面源污染研究刘振英,李亚威,李俊峰s,金朝晖,顾久君,张云霞(1.南开大学环境科学与工程学院,天津300071;2.内蒙古环境保护局,内蒙古呼和浩特010018;3.乌海市环境科学研究所,内蒙古乌海016000)摘要:以乌梁素海流域现有的灌排水系统为基础布设采样点,监测农田退水以及乌梁素海人口中总氮,总磷浓度;应用环境污染物模型研究污染物在主排干的综合降解情况
2、,并对模型进行校正.结果表明,总氮总磷在主排干的综合降解率达到30.32%和61.51%;在进入乌梁素海的负荷量中.来自农田面源污染的总氦为2646.51t?a～,总磷为29.96t?a～,分别占进入乌梁素海污染物总负荷量的77.57%和26.78%.结合乌梁素海流域农业开发方式,农田灌溉行为以及施肥习惯的调查结果,分析了乌梁素海流域农田面源污染的主要原因..关键词:乌梁素海流域;农田面源污染;总氮;总磷中图分类号:X501文献标识码:A文章编号:1672—2043(2007)01—0041—04Agricu
3、lturalNon-pointSourcePollutioninWuliangsuhaiValleyLIUZhen—ying,LIYa—wei,LIJun-feng3,JINZhao?hui.,GUJiu-jun.,ZHANGYun—xia(1.CollegeofEnvironmentalScienceandEngineer,NankaiUniversity,Tianjin300071,China;2InnerMongoliaEnvironmentProtectionBureau,Hohhot010018,C
4、hina;3.EnvironmentalScienceInstituteofWuhaiCity,Wuhai016000,China)Abstract:Basedontheoriginalirrigationanddrainagesystem,samplingsitesweresotinthemaindrainagecanalofWuliangsuhaiValleyandinletsofthelake.InordertostudytheeutrophicationofWuliangsuhaiLakebyagri
5、culturalnon-pointsourcepollution.nutrientconcen-trafionsinthewaterweremonitoredatninesamplingsitesinWuliangsuhaiValley.Thesampleswerecollectedin2004duringnonfreezingperiodsfromMaytoDecember.r0talnitrogenandtotalphosphorustransferlossinmaindrainagecanalwerec
6、alculatedbypollutantdegra-dationmodelthatWasemendatedbytemperature.ThedegradationratesoftotalnitrogenandtotalphosphOroUSwere30.32%and61.51%,respectively.Thus,totalnitrogenandphosphorusloadsintoWuliangsuhaiLakefromagriculturalnon-pointsourcepollutionwere2646
7、.51t?a_1and29.96t?a_1.accountingfor77.57%and26.78%oftotalloadsintoWuliangsuhaiLakefromallpollutionsoUI~es.Theresultsindicatedthatagriculturalnon—pointsoureewasmainsourceofnutrientandmainreasonofeutrophicationinWuliangsuhaiLake.Throughinvestigat-ingtheagricu
8、lturalirrigationmeansandtraditionalfertilizationmodes,themaincauseofagriculturalnon—pointsourcepollutioninWu—liangsuhaiValleyWasanalyzed.Keywords:WuliangsuhaiValley;agriculturalnon—pointsoureepollution
