欢迎来到天天文库
浏览记录
ID:57735617
大小:350.73 KB
页数:4页
时间:2020-03-26
《陇东白垩系自流水盆地演化的水文地质意义.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36卷第8期人民黄河Vo1.36.No.82014年8月YELL0WRIVERAug.,2014【水文泥沙】陇东白垩系自流水盆地演化的水文地质意义郭富赘一,黎志恒,刘心彪,孟兴民(1.兰州大学西部环境教育部重点实验室,甘肃兰州730000;2.甘肃省地质环境监测院,甘肃兰州730050)摘要:陇东盆地位于鄂尔多斯盆地西南部,形成于白垩世,受后期构造影响,由原生的封闭盆地变成了现今开放的自流水盆地含水系统。根据含水层的时空分布特征,可将陇东盆地分为第四系含水系统和白垩系含水系统两大系统;根据含水介质特征,在平面上可将陇东盆地地下水划分为白
2、垩系碎屑岩类裂隙水、黄土孔隙裂隙水、河谷松散岩类孔隙水三大类型,垂向上黄土、河谷含水系统与白垩系含水系统不同含水岩组在空间上相叠置,其中黄土塬潜水、河谷潜水和白垩系深层承压水是具有供水意义的含水子系统。黄土塬潜水是独立的含水系统,白垩系深层承压水一潜水和河谷潜水形成了河流一盆地循环系统。盆地深层承压水径流缓慢,因此存在的深层淡水资源十分宝贵,可能属于不可再生的。关键词:地下水;潜水;承压水;白垩系;含水系统;陇东盆地中图分类号:TV121文献标志码:Adoi:10.3969/j.issn.1000—1379.2014.08.005Evol
3、utionoftheLongdongCretaceousArtesianBasinHydrologicalGeologicalSignificanceGUOFu—yun,,LIZhi—heng,LIUXin—biao,MENGXing—min(1.KeyLaboratoryofWesternChina’SEnvironmentSystemoftheMinistryofEducation,LanzhouUniversity,Lanzhou730000,China;2.GansuInstituteofGeo—EnvironmentMonito
4、ring,Lanzhou730020,China)Abstract:Longdongbasin,formedintheCretaceousislocatedinthesouthwestofErdosbasin.Controlledbythetectonicevolution,itevolvesfromanativeclosedbasintoanopenartesianbasinatpresent.ItcanbedividedintoQuaternaryaquifersystemandCretaceousaquifersystembythe
5、characteristicsoftemporalandspatialdistributionofaquifer.Accordingtothecharacteristicsofwaterbearingmedia,intheplaneofLongdongbasingroundwatercanbedividedintothreetypesofCretaceouselasticrockfissurewater,loessporefissurewaterandKotaniMatsurockporewa—ter.Intheverticaldirec
6、tion,thedifferentwaterbearingformationsofvalleyloessaquifersystemandCretaceousaquifersystemareinspacesuper-imposition,ofwhich,theunconfinedwaterofloesstablelandandvalleyandCretaceousdeepconfinedwaterarewatersubsystemswithwatersupplysignificance.Theunconfinedwaterofloessta
7、blelandisanindependentaqueoussystemandtheCretaceousdeepconfinedwater-unconfinedwaterandvalleyunconfinedwaterformedthecirculatorysystemofriver—basin.Therunofofdeepconfinedwaterbasinisslow,SOtheexistenceofdeepfleshwaterresourcesisveryvaluableandmaybelongtononrenewable.Keywo
8、rds:groundwater;unconfinedwater;confinedwater;cretaceous;watersystem;Longdongbasin陇东盆地位于鄂尔多斯盆地西南
此文档下载收益归作者所有