土壤浸湿对重力观测影响的初步分析  

The Preliminary Analysis of the Effects of the Soil Moisture on Gravity Observations

作　　者：张为民[1] 王勇[1] 张赤军[1] 

机构地区：[1]中国科学院测量与地球物理研究所,湖北武汉430077

出　　处：《测绘学报》2001年第2期108-111,共4页Acta Geodaetica et Cartographica Sinica

基　　金：中国科学院"九五"重点项目! ( K Z95 2 -J1-4 17) 中国重大科学工程"中国地壳运动观测网络"工程

摘　　要：本文对武汉测绘科技大学 (WTUSM)重力基准点在暴雨后不久引起的观测异常进行了测试和研究 ,包括对测点附近的土壤在饱和前后的密度、孔隙度等及由此而引起的重力变化进行计算和分析。结果表明 ,该项效应与雨后相对于正常天气情况下 3次观测结果 (平均值 )的偏离相当接近。文中还对今后在绝对重力测量中 。The gravity observational anomalies at Wuhan Technical University of Surveying and Mapping (WTUSM) station in the rainstorm before long were tested and investigated in this paper, including the computations and analysis of gravity changes caused by the density and porosity of the soil surrounding the station before and after soil saturation. The results showed that the observational values corrected by the effects of the changes of density and porosity of soil on gravity were consistent with the ones observed at the normal weather. Some suggestions of paying attention to the effects of the soil moisture on gravity were put forward in the absolute gravity observations also.

关 键 词：土壤浸湿 重力变化 绝对重力测量 重力基准点 密度 孔隙度 

分 类 号：P223[天文地球—大地测量学与测量工程]