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时间:2020-04-20
《砒砂岩区植物拦沙作用导致泥沙筛分效应研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第32卷第6期水土保持通报Vol_32,No.62012年12月BulletinofSoilandWaterConservationDec.,2O12砒砂岩区植物拦沙作用导致泥沙筛分效应研究谢毅文,李怀恩,李越。,张强,高卫平,陈焕节(1.东莞理工学院化学与环境工程学院,广东东莞523808;2.西安理工大学西北水资源与环境生态教育部重点实验室,陕西西安710048;3.珠江水利委员会珠江水利科学研究院,广东广州510611;4.珠江水利委员会,广东广州510611;5.珠江流域水资源保护局,广东广州510611)摘要:对黄河中上游砒砂岩区两个典
2、型流域(/g一支沟和对比沟)进行了实地调查,并对其监测资料进行了对比分析。结果发现,种植沙棘的东一支沟沟床表层泥沙颗粒级配累积曲线及整体粒径呈由上游至下游逐渐变细的分布特征,而没有种植水保植物的对比沟则呈不规则分布;同时发现,东一支沟沟床表层土中粒径大于1miD_的粗沙含量比例平均仅为2.0,而对比沟则达9.93。研究表明沙棘植被的拦沙固沙作用导致沟床产生了泥沙筛分效应。关键词:植物拦沙;筛分效应;泥沙级配文献标识码:A文章编号:1000—288X(2012)06—0022—04中图分类号:TV21,S157.1SievingEffectofPl
3、antsonSediment_fixationinSoftRockAreasXIEYi—wen,LIHuai—en,LIYue。,ZHANGQiang,GAOWei—ping,CHENHuan—jie(1.CollegeofChemicalandEnvironmentalEngineering,DongguanUniv.of.,Dongguan,Guangdong523808,China;2.KeyLab.ofNorthwestWaterResourcesandEnvironmentEcologyofMOE,XianUniversityofTec
4、hnology,Xian,Shaanxi7100482,China;3.PearlRiverHydraulicResearchInstitute,Guangzhou,Guangdong510611,China;4.PearlRiverWaterResourceCommittee,Guangzhou,Guangdong510611,China;5.BureauofPearlRiverBasinWaterResourcesProtection,Guangzhou,Guangdong510611,China)Abstract:Combinedwithf
5、ieldsurvey,comparativeanalysiswasconductedonlong—termmonitoringdatacol—lectedintheDongyizhigougullyandtheadjacentcontrastgully,whichislocatedinthesoftrockareaintheupperandmiddleYellowRiverbasin.Acleartrendofsedimentgrain-sizedistributionthatsedimentgrain-sizecumulativecurvean
6、dtotalgraindiameterbecamefinerfromtheuppertolowerstreamwasfoundintheDongyizhigougully,whereseabuckthornvegetationwasplantedandalmostcoveredthewholegully.Incon—trast,thesedimentgrainsizedistributionshowednoregularityatallinthecontrolgullywherenovegetationwasplanted.Specificall
7、y,thecontentofsedimentwithdiameterlargerthan1mmwas2.0onthegullybedoftheDongyizhigougully,whereasitwas9.93onthatofthecontrolgully.Theanalysisresultsshowedthatsand—fixingcapabilityofseabuckthornvegetationimposed3sedimentsieveeffectonthesedimenttransportationinthegullybed.Keywor
8、ds:sediment-fixingbyplant;sieveeffect;sedimentgrain-size砒砂岩地区位于黄河中上游
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