摘要
研究了2003—2006年天津宝坻地震台Sacks体应变观测值与固体潮、气压、抽水和降雨的关系,认为固体潮汐是影响体应变日波、半日波变化的第一种主要因素,与其呈同步、线性、正相关关系,月回归系数平均值为0.533,其时间函数存在年变;日、半日周期气压波是影响体应变日波、半日波变化的第二种主要因素,亦与其呈同步、线性、正相关关系,月回归系数平均值为6.28×10-11/Pa,其时间函数无明显年变;机井近距离短时抽水会对体应变日波观测产生同步脉冲干扰作用,这是由地下水动力学效应所致;暴雨会对体应变日波观测产生一定的同步上升干扰,并且降雨量越大作用越明显,这可能与台站所处地区含水层强富水、连通性和导水性好有关。
We analyzed the relations between the observations with Sacks body strain meter and solid tide, atmospheric pressure, pumping and rainfall during 2003--2006 at Baodi seismostation in Tianjin. It is thought that the solid tide is the first major effect factor on the Sacks body strain observations, there is a synchronous, linear and normal correlation between them, their average value of monthly regression coefficient is 0. 533, it＇ s time function has the annual variation characteristics. The daily or semi-diurnal atmospheric pressure wave is the second major factor on the Sacks body strain observations, there is also synchronous, linear and normal correlation between them, their average value of monthly regression coefficient is 6.28 ×10^-11/Pa, it＇s time function have no obvious annual variation. Short-time pumping near Sacks, will bring the synchronous normal interference to the daily wave, it is caused by ground water dynamics effect. Rainstorm will bring the synchronous rise of normal interference to daily wave, and the more heavy the rainfall is, the more clear this action is, it may be related with containing am- ple water stratum, good connectivity and dank character of the studied area.
出处
《大地测量与地球动力学》
CSCD
北大核心
2008年第2期28-33,共6页
Journal of Geodesy and Geodynamics
基金
"十一五"国家科技支撑计划重点项目(2006BAC01B02-02-01)
关键词
体应变
固体潮
气压
抽水
降雨
body strain
solid tide
atmospheric pressure
pumping
rainfall
