论海岸带高精度重力测量中区—远一区地形改正计算  

The Study on the Median Region-Far RegionⅠTerrain Correction of High Precision Gravity Survey in the Coastal Zone

作　　者：刘洪波 于林松 齐永亮 于嘉宾 吴治国 张宁 LIU Hongbo;YU Linsong;QI Yongliang;YU Jiabin;WU Zhiguo;ZHANG Ning(Shandong Institute of Geophysical and Chemical Exploration,Jinan 250013,China;School of Civil Engineering,Shandong University,Jinan 250061,China;Shandong Provincial Engineering Research Center for Geological Prospecting,Jinan 250013,China;College of Marine Earth Sciences,Ocean University of China,Qingdao 266100,China)

机构地区：[1]山东省物化探勘查院,济南250013 [2]山东大学土建与水利学院,济南250061 [3]山东省地质勘查工程技术研究中心,济南250013 [4]中国海洋大学海洋地球科学学院,山东青岛266100

出　　处：《华北地震科学》2024年第1期45-50,共6页North China Earthquake Sciences

基　　金：国家自然科学基金-山东联合基金(U2006201);2023年度山东省物化探勘查院科技攻关项目(KY202303);国家重点研发计划(2023YFC2906900)。

摘　　要：在重力地形改正理论公式的基础上,建立修正海水引力影响的海岸带重力地形改正公式,经计算,常见海岸带斜面地形下坡度角从1°增大至10°,修正后公式和规范公式的改值之差的极大值从0.074×10^(-5)m/s^(2)增大至7.387×10^(-5)m/s^(2),直接影响重力测量异常精度;并以地形相对复杂的东海南部海岸带及渤海海峡北隍城岛海域为例进行正演计算和分析,结果表明采用建立的地形改正公式进行改正可有效提高海岸带重力测量异常精度。On the basis of the theoretical formula for gravity terrain correction,a coastal gravity terrain correction formula for correcting the influence of seawater gravity is established.After calculation,the slope angle of common coastal slope terrain increases from 1°to 10°,and the maximum difference between the modified formula and the standard formula is 0.074×10^(-5)m/s^(2)to 7.387×10^(-5)m/s^(2),which directly affects the accuracy of gravity measurement anomalies.Taking the coastal zone of the East China Sea and the Beihuangcheng Island area in the Bohai Strait with relatively complex terrain as examples for forward calculation and analysis,the results show that using the established terrain correction formula for correction can effectively improve the accuracy of gravity measurement anomalies in the coastal zone.

关 键 词：海岸带 高精度重力测量 中区—远一区 地形改正 海水 

分 类 号：P223[天文地球—大地测量学与测量工程] P312[天文地球—测绘科学与技术]