摘要
针对地球重力场及大地水准面由于受到地表水、海面高异常及地下水动力环境影响,会发生实时变化的问题,该文基于土壤水与海面高数据,采用负荷形变理论和重力场球谐分析方法,研究了浙江区域土壤水、海面高异常及土壤水-海面高异常对地面重力变化和大地水准面变化的影响。研究表明,土壤水-海面高异常综合负荷对地面重力变化的影响最大值大于15μGal,对大地水准面影响比较小,影响范围在±4 mm。
Aiming at the problem of the earth gravity field and geoid change over time due to the surface water,diversification of sea level and groundwater hydrodynamic environment.This paper calculated the gravity change and geoid caused by the variations soil water,sea level and soil water-sea level abnormality,using gravity loading deformation theory and gravity field spherical harmonic analysis methods in Zhejiang Province.The results showed that the maximum impact of soil water-sea level abnormality on ground gravity was more than 15μGal,that the value between-4~4 mm has little influence on geoid from soil water-sea level abnormality.
作者
何迎东
章传银
刘阳
王伟
蒋涛
HE Yingdong;ZHANG Chuanyin;LIU Yang;WANG Wei;JIANG Tao(Faculty of Geomatics,Lanzhou Jiaotong University,Lanzhou 730070,China;Gansu Provincial Engineering Laboratory for National Geographic State Monitoring,Lanzhou 730070,China;Chinese Academy of Surveying and Mapping,Beijing 100036,China;Shandong University of Science&Technology,Qingdao,Shandong 266590,China)
出处
《测绘科学》
CSCD
北大核心
2020年第3期28-32,45,共6页
Science of Surveying and Mapping
基金
国家重点研发计划项目(2016YFB0501702,2017YFB0504201)。
关键词
大地水准面
地面重力
环境负荷形变
球谐系数
geoid
ground gravity
environmental load deformation
spherical harmonic coefficient
