DOI：10.13905/j.cnki.dwjz.2023.6.024东北多年冻土区活动层水分迁移规律研究RESEARCHONTHEMOISTUREMIGRATIONOFACTIVELAYERINPERMAFROSTZONEOFNORTHEASTCHINA王继鹏1，车富强1，周刚义1，林岩波2，段世龙1（1.国家林业和草原局重点国有林区森林资源监测中心，黑龙江加格达奇165000；2.国网大兴安岭供电公司，黑龙江加格达奇165000）WANGJipeng1,CHEFuqiang1,ZHOUGangyi1,LINYanbo2,DuanShilong1（1.ForestResourcesMonitoringCenterofKeyState-ownedForestRegion,NationalForestryandGrasslandAdministration,HeilongjiangJiagedaqi165000,China;2.StateGrid,GreaterKhinganPowerSupply,HeilongjiangJiagedaqi165000,China）【摘要】为进一步研究多年冻土区零点幕的形成机理、水文与水资源环境变化特征、森林植被演替规律，解决寒区工程建设冻胀问题，文中通过对东北中高纬度岛状多年冻土区活动层地温及水分变化特征的监测，阐述了年水分循环3个阶段的迁移过程，以及年水分迁移总量下移，在活动层底部形成多层1~2mm薄冰层的原因。研究结果表明，水分迁移后的土层导热性突减、能量损失、相变潜热耦合作用是形成零点幕的决定因素。【关键词】多年冻土区；寒地工程；土层导热性【中图分类号】TU413【文献标志码】A【文章编号】1001-6864（2023）6-0107-05Abstract：Thispaperstudiestheformationmechanismofzerocurtain,thechangingcharacteristicsofhydrologyandwaterresources,andthesuccessionofforestvegetationinpermafrostregiontosolvethefrost-heavingproblemofen⁃gineeringconstructionincoldregions.ThroughmonitoringthecharacteristicsofgroundtemperatureandwaterchangesintheactivelayeroftheislandlikepermafrostregioninthemiddleandhighlatitudesofNortheastChina,themigrationprocessofthreestagesoftheannualwatercycleandthedownwardmovementofthetotalamountofan⁃nualwatermigrationareillustrated.Thereasonfortheformationofmultiple1~2mmthinicelayersatthebottomoftheactivelayerarediscussed.Theresultsindicatethatthesuddendecreaseinsoilthermalconductivity,energyloss,andthecouplingeffectofphasechangelatentheatafterwatermigrationarethedeterminingfactorsforthefor⁃mationofazero-pointcurtain.Keywords：permafrostzone;coldregionsengineering;thermalconductivityofsoil0引言在地球大气圈与岩土圈进行长期...
