乌梁素海湖泊冰生长过程的现场观测
- 海之魂
-
1 次阅读
-
0 次下载
-
2020-03-12 08:16:39
文档简介:
【水文泥沙】乌梁素海湖泊冰生长过程的现场观测张岩1,李畅游2,裴国霞2,史小红2,李超2(1.烟台大学土木工程学院,山东烟台264005;2.内蒙古农业大学水利与土木建筑工程学院,内蒙古呼和浩特010018)摘要:为了研究湖泊结冰过程中特有的水文特性对冰封期水环境的影响,以乌梁素海湖泊为研究对象,对湖泊冰生长过程中气温、冰温和水温进行在线观测,以分析冰温和水温对气温的响应关系。用冰钻钻取冰厚依次为9.5、21.0、31.0、41.0、59.0cm时的冰柱样品,对其表观密度进行测定,并从冰的透明度、冰晶体类型、气泡数量和冰柱底面纹理四方面分析每段冰柱的形态结构。结果表明:冰温和气温有相同的变化趋势,冰温的变化滞后于气温的;冰下水的温度不受气温的影响,稳定在-0.25~-0.50℃;湖冰生长期冰的表观密度为895.2~903.3kg/m3,冰柱下层的表观密度小于上层的,这与冰生长速率和气泡的数量及体积有关;湖冰生长过程中不同深度冰柱的透明度、晶体类型、气泡含量和底面纹理有较大差异。关键词:观测;冰体结构;温度;冰生长;乌梁素海中图分类号:P332.8文献标志码:Adoi:10.3969/j.issn.10001379.2014.08.006FieldObservationofIceGrowingProcessinWuliangsuhaiLakeZHANGYan1,LIChangyou2,PEIGuoxia2,SHIXiaohong2,LIChao2(1.CivilEngineeringCollege,YantaiUniversity,Yantai264005,China;2.WaterConservancyandCivilEngineeringCollege,InnerMongoliaAgriculturalUniversity,Huhhot010018,China)Abstract:Inordertostudytheeffectofhydrologicalcharacteristicsonwaterenvironmentduringfreezingperiod,WuliangsuhaiLakewasselectedforastudyobject.Theatmospheretemperature,icetemperatureandwatertemperaturewereobservedonlinetoanalyzetheresponserelationshipbetweenthem.Theicecoresampleof9.5cm,21.0cm,31.0cm,41.0cmand59.0cmwerecollectedinordertomeasuretheapparentdensityandobservetheicemorphologicalstructurefromtransparency,crystaltypeandnumberofbubbles.Theresultsshowthattheicetemperatureappearstohavethesamechangingtrendasatmospheretemperature,butthechangingoficetemperatureisdelayasagainstthatofatmospheretemperature.Buttheatmospheretemperatureshowsnoeffectonundericewatertemperature,whichisalwaysstabilizedon-0.25~-0.50℃.Themajordifferenceexistsamongtransparency,crystaltypeandnumberofbubblesasicegrowing.Theapparentdensityoficeis895.2~903.3kg/m3inicegrowingprocess,whilethevalueoflowerlayerislessthanthatofupperlayer,whichisrelatedtoicegrowingrateandnumberofbubbles.Allthetransparency,crystaltype,numberofbubblesanddensetextureatthebottomaredifferentintheverticaldirectionasicegrowing.Keywords:observation;icemorphologicalstructure;temperature;icegrowingprocess;WuliangsuhaiLake冰冻是北半球中高纬度地区普遍存在的一种
评论
发表评论