简介:Inthispaper,thelongtimeseriesdataofthewellwater-leveldataof12wellsintheSichuanandYunnanareaisanalyzedbytheBaytap-Gtidalanalysissoftware,andwellwaterleveltidalresponsecharacteristicparameters(amplituderatioandphasechange)areextracted.Weanalyzedthefeaturesoftheshapeandstagechange,andcharacteristicparametersofthetidalresponseofwellwaterlevelbeforeandaftertheearthquakes,whichcanprovideanewmethodandapproachtoanalyzingtheresponserelationshipsbetweenwellwaterlevelandearthtideandbarometricpressure.TheresultsshowthatLuguhuWelland9otherwellsareaffectedbyearthtides,andtheirwellwaterlevelamplituderatiosandphasesarerelativelystable;theNanxiWellandDayaoWellwaterlevelchangesareaffectedbythebarometricpressurecombinedwithtideforce,andtheirwellwaterlevelamplituderatiosandphasesaremorediscrete.ThewaterlevelamplituderatiosandphasesofJiangyouWell,LuguhuWellandDongchuanWellaresignificanttolargeearthquakes,andtherelationshipbetweenseismicenergydensityandwaterlevelamplituderatiosandphasesofM_2waveofthethreewellsarepresented.
简介:Inthisstudy,weanalyzetheco-seismicresponseofwaterlevelsintheJiajiwelltostrongearthquakes(MS≥7.8)from2001to2010atanepicentraldistancelessthan8000km.Weinvestigatedtheco-seismicvariationformofwaterlevels,andanalyzedtherelationshipbetweentheamplitudeofwaterlevelvariationandthemagnitudeandtheepicentraldistance.Wethencheckedtheseismicwavephaseswhenthechangesofwaterleveloccurred.Itwasshownthat:(1)thewaterlevel'sco-seismicresponseismainlycharacterizedbyescalationwithnooscillation;(2)theamplitudeofwaterlevelchangehasacertainconnectionwithepicentraldistanceandmagnitude;(3)co-seismicresponseofwaterlevelsintheJiajiwellshowsacertaindirectivity;(4)mostoftheco-seismicresponseswerecausedbysurfacewaves,andsomebylong-periodSwaves.
简介:地下的水的overexploitation在动态水水平观察井导致地下水层次,优秀的水的变化和枯竭的连续drawdown。由于陆地沉淀,井管子高举并且观察尖系统被损坏。这些环境地质学问题能由地下水水平观察为地震异例的鉴定论述严重困难。hydrogeological理论和方法上的Basied,水平衡的关系与stressstrain条件含水土层说的纸分析和水铺平政体,然后preliminarily为在一个地下水透支区域识别水水平异例很好讨论理论和方法。我们精确地装的结果表演与上述的理论和方法和从存在数据获得的多年变化模式在联合在井区域根据drawdown漏斗的散开特性的意见判定异例的性质。研究的结果对区分在水水平上从水的长期的透支抽的单个集中的水的影响有用,正确地在地下水透支区域认出水水平异例并且增加地震分析和预言的水平。
简介:Onthehydro-spectrumofdeepwellsandtheresponseabilityofwell-aquifersystemWen-BinJIAN(简文彬);Bao-RenCHEN(陈葆仁)andShu-YunLIU(刘淑芸)(De...
简介:Basedonlinearporoelasticandhydrogeologytheory,amathematicalexpressiondescribingtherelationshipbetweenwaterlevelchangeandaquifervolumestrainisputforward.Combinedwithearthtidaltheory,weanalyzetheresponsecharacteristicsfromwell-aquiferwaterlevelchangetoearthtideofvolumestrainandpresentamethodofvolumestraininversionfromwaterlevelchange.Comparingtheresultsofinversionwithrealobserveddata,wefoundthatthereisagoodconsistency.Thissuggeststhatthemethodofvolumestraininversionfromwaterlevelchangeisproper.Itwillofferareferenceforlearningabouthydrogeologycharacteristics,volumestrainandsearchingforprecursoranomalies.
简介:Amodelofdoublemediumaquiferisbrieflyintroducedinthispaper,apartialdifferentialequationaboutseepagemotionderivedbythetidalstressinthemodellayerisdeduced.ComparedthisequationwithBoultonequationusedintheunconfinedaquifer,anewlaggingsupplywatertermisobtained,whichestablishthephysicalbasisforinterpretingthephasedelayphenomenaofwellwaterlevelcausedbythesolidtide.Byanalyzingthepartialdif-ferentialequation,itisfoundthatthislaggingsupplytermisrelatedwiththefluctuationoftideoccurredinthedeepaquifer.
简介:Heatflowisinevitablyaccompaniedbytemperaturechange,thus,thewatertemperaturecoseismicresponseduringearthquakeactivityshouldalsoobeythelawsofthermodynamics.TakingtheMS8.0Wenchuan,Sichuan,ChinaearthquakeandtheM9.0Tohoku,Japanearthquakeasanexample,andbasedonthedataofwatertemperaturecoseismicresponsesobservedinwellZK26inHaikou,HainanProvince,China,weinvestigatetherelationshipbetweenwellwatertemperaturechangeandheattransferinthecoseismicresponseprocessandtherelevantthermodynamicmechanismbyusingthenumericalsimulationmethodforthermodynamicequations.Then,throughforwardmodeling,weobtainseveralsimulationcurvesofwatertemperaturechangeinresponsetoearthquakesalongthewelldepthatdifferenttimes.Thesimulatedcurvesofwatertemperaturechangeapproximatelyfittheobservedcurves.Consequently,basedonthevariationoftemperature,wefindthatthemodesofwellwatertemperaturecoseismicresponse(ascending,descendingorstable)arerelatedtofactorssuchasthelocationofsensors,distributionandlocationofheatsources,thespanbetweensensorsandheatsources.