摘要
本文基于井水位微动态对固体潮和大气压响应的物理机制,运用水-岩耦合理论,建立了井水位对固体潮-气压综合作用的响应模型。以邛崃川22井和南溪川12井为例,通过井水位与固体潮和气压原始曲线的对比及拟合分析,对井水位对固体潮-气压综合作用的响应模型进行了验证。结果表明,两口井对固体潮-气压综合响应非常好,井水位的变化均由固体潮和气压变化引起。两口观测井中,以南溪川12井的水位综合响应能力较好,邛崃川22井水位受到较多的杂讯干扰,水位曲线日变化较复杂。对邛崃川22井进一步分析表明,利用井水位时段平均值可有效消除观测误差,用小时值计算时可以忽略井水位对气压响应的滞后效应。
Based on the physical mechanism of groundwater level responses to atmospheric pressure and tidal force,we use the theory of water coupling with rock in rock mechanics,and establish the response model of the groundwater level to combined atmospheric pressure tidal force.As examples,we take the Qionglai Chuan-22 well and the Nanxi Chuan-12 well and have confirmed the response model through comparison and fitting analysis of the original curve between the groundwater level and tide force and atmospheric pressure.The results show that the response of groundwater level of the two wells to the combined effect of tidal force and atmospheric pressure is better,the changes of groundwater level are caused by the combined effect of tide force and atmospheric pressure.The groundwater level response ability of the Nanxi Chuan-12 well is better,and the groundwater level of the Qionglai Chuan-22 well has more noise,the change of groundwater level is more complex.Further analysis of the groundwater level of the Qionglai Chuan-22 well shows that observation errors can be effectively eliminated by using the interval average value of the groundwater level,the lag effect of the groundwater level on atmospheric pressure response can be neglected in the hourly values.
出处
《地震》
CSCD
北大核心
2016年第3期67-75,共9页
Earthquake
基金
2015年度震情跟踪定向工作任务(2015010303)资助
关键词
井水位
固体潮
气压
响应模型
Groundwater level
Atmospheric pressure
Tidal force
