欢迎来到天天文库
浏览记录
ID:36523215
大小:2.18 MB
页数:77页
时间:2019-05-11
《鄂尔多斯盆地沙漠高原区湖泊和潜水面蒸发能力研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、978d36分类号:殴墨长安大学硕士学位论文申请学位级别亟±学科名称盔塞堂区盔鳌遂论文提交日期2QQ互生互目论文答辩日期2QQ互生互目窆目答辩委员会主席:学位论文评阅人:缝通过研究表明,研究区表土蒸发量在非冻期主要受降雨量及岩性的影响,降雨量越大,岩性越细表土蒸发量越大.潜水蒸发则主要受到气象条件(主要为水面蒸发量和降雨量)、岩性及埋深的影响,其规律为:潜水蒸发强度与水面蒸发强度呈正比,与降雨量呈反比;随着埋深的增大潜水蒸发强度减小,并逐渐趋近于零,经计算研究区几种代表岩性的极限深度分别为:风积砂0.5m,风化砂岩0.8m,淤泥质砂lm、壤土
2、15m.潜水蒸发同样受到包气带岩性结构的影响,当埋深较浅时,粗颗粒岩性地层潜水蒸发量较大,随着埋深的增大细颗粒岩性地层潜水蒸发量逐渐大于粗颗粒岩性;当岩性结构为层状时,根据岩性的粗细及组成结构和层位的不同对潜水蒸发的影响作用不同,或为促进或为抑制,经计算得出研究区广泛覆盖在表层的风积砂对该地区的地下水资源起到了很好的保护作用.本文在以上研究的基础上,将湖泊及潜水面蒸发强度推广到研究区域,模拟计算了区域不同地区湖泊及潜水面蒸发强度,为该地区水资源评价提供依据.关键词水面蒸发潜水蒸发包气带原位试验数值模拟鄂尔多斯沙漠高原AbstractArdos
3、desertplateau,withvastterritoryandabundantresource,liesinthenorthernofArdosbasin,whichisenergyandchemicalindustrybaseofWestDevelopmentof21stcentury.Recently,theneedofwaterisincreasingmpidlywiththedevelopmentofeconomy.However,be..eanseofthescarerainfallwithheavyevaporation,s
4、eriousdesertificafionandsoilerosionandruinerableecologicalenvironmentinthearea.Thepreliminaryresearchshowsthatverticalexchangeisthechiefwayofwatercyclein也earea.Theevaporationoflakesandgroundwateroccupiedmostofdischargeofgroundwater.Therefore,asoneofthevitalfactorsofgroundwa
5、terbalance,itisveryimportanttostudyspace-timedistributionofevaporationintensityoflakesandgroundwaterintheareaanddiscussontherulesandinfluential自cc0路ofwater翻1rfa∞evaporation,whichplayed龃importantroletoevaluatethequantityofwaterresonre∞andprotectthegroundwaterreasonably.1mepa
6、per,reliedonNationalItem,oftheexperimentstudyonintensityofintluentseepageandevaporationoferetacPA)usgroundwatersurfaceinArdosbasin,whichwaschargedbyEnvironmentalEngineeringinstituteofChangAnUniversi修.Ihadparticipateintheworksof皿eevaporationexperimentofdifferentsalinityconta
7、inedlakesandtheobservationofthevadnsewaterpressurehead,throughinvestigatedofthelithologiesandanalyzedtheweatherpropertyofthisareathepaperwascomposed,thearticlemainlystudiedaboutthelakeevaporationandphreaticevaporationthosetwosides:O)withdifferentsalty-containedlevelwatersam
8、ples,watersurfaceevaporationexperimentsisdonebyE601.Duringexperiment,theevaporatio
此文档下载收益归作者所有