大气降水对数字化地倾斜观测干扰特征分析
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摘要
对武汉基准地震台倾斜固体潮观测资料的研究表明,固体潮曲线畸变是降雨渗透使基岩膨胀的结果。降雨对记录曲线的影响主要表现在:1)时间上具有同步效应。降雨发生后倾斜仪的NS分量发生南倾,EW分量发生东倾;2)量级上受降雨干扰严重的主要为NS分量,EW分量受干扰程度较轻;3)垂直摆受降雨的干扰程度比水管仪的大。
The disturbance patterns of the tiltmeter observation of VS and DSQ at Wuhan station during the period of "Tenth Five Year Project" were studied.It is found that the rainfall and other factors may have the serious effect on the tide distortions.By analyzing the abnormal phenomena of the tilt tide curves,it seems that above anomalies arised from rainfall osmosis bringing about the expansion of base rock.It can be seen that there is a close correlation between the tile tide aberration and rainfall.The disturbance curve configuration is complicated and of 3 types.On the view of time there is synchronization that the NS component of tilemeter trends to S as well as the EW component to W after the rainfall.On the view of quantity it is found that NS component is disturbed by rainfall more seriously than EW component as well as VS tiltmeter is disturbed by rainfall more seriously than DSQ tiltmeter.
The disturbance patterns of the tiltmeter observation of VS and DSQ at Wuhan station during the period of "Tenth Five Year Project" were studied.It is found that the rainfall and other factors may have the serious effect on the tide distortions.By analyzing the abnormal phenomena of the tilt tide curves,it seems that above anomalies arised from rainfall osmosis bringing about the expansion of base rock.It can be seen that there is a close correlation between the tile tide aberration and rainfall.The disturbance curve configuration is complicated and of 3 types.On the view of time there is synchronization that the NS component of tilemeter trends to S as well as the EW component to W after the rainfall.On the view of quantity it is found that NS component is disturbed by rainfall more seriously than EW component as well as VS tiltmeter is disturbed by rainfall more seriously than DSQ tiltmeter.
引文
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10张卫华,李胜乐,陈昊.九江-瑞昌5.7级地震定点潮汐形变的异常分析[J].大地测量与地球动力学,2006,(2):34-38.
2陈正洪,杨宏青,涂诗玉.武汉、宜昌近100多年暴雨与大暴雨日时间变化特征[J].湖北气象,1999(3):11-14.
3陆明勇.地壳形变与地下水相互作用及“双力源”前兆观点[J].大地测量与地球动力学,2006,(1):76-83.
4李晓,等.库水位涨落与降雨联合作用下滑坡地下水动力场分析[J].岩石力学与工程学报,2004,23(2 l):3714-3 720.
5牛安福.地倾斜变化的突变性及与地震关系的研究[J].地震学报,2003,25(4):441-445.
6王梅,等.日本7级以上双震前泰安台伸缩仪固体潮畸变[J].大地测量与地球动力学,2006,(4):69-75.
7陈德元,等.基于岩性划分的渗透率预测模型研究[J].地球科学与环境学报,2007,29(2):158-161.
8陈颙,黄庭芳.岩石物理学[M].北京:北京大学出版社,2001.
9日置幸介.地震与荷载的微妙关系[J].世界地震译丛,2007,1:39-46.
10张卫华,李胜乐,陈昊.九江-瑞昌5.7级地震定点潮汐形变的异常分析[J].大地测量与地球动力学,2006,(2):34-38.
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