《Science China- Technology Science》刊登“消除大气压对地下水位的影响来确定其主要影响因素”

作者：ZHAO Dan & WANG GuangCai

刊物：《Science China- Technology Science》，2013年1月，第56卷第1期，129–136页

关键词：地下水位；大气压影响；水位校正；影响因素

摘要：大气压的变化会影响地下水位的微动态。地下水位资料包含大量重要的构造活动和地震信息。为了有效识别地震异常现象，去除地下水位资料中的大气压效应是非常重要的。本文通过对大气压的主要影响因素及其变化的分析，更好的理解了可以为地震预测提供有用信息的含水介质的改变。同时以2008年5月12日汶川地震为例，基于南溪、邛崃市和巢湖井的调查观测数据资料论述了大气压对地下水位的影响。并使用线性回归法和重叠回归法去除地下水位数据中的大气压影响。以谐波分析和光谱分析识别出大气压力效应中的主要影响波。并对地震前和地震后的主要影响波进行了比较。结果表明：大气压力效应的主要影响波有所改变，所有影响因素的振幅也有所改变。这一现象可能是由于压力主要影响因素的特征和地震引起含水介质的改变造成的。

Removing barometric pressure effects from groundwater level and identifying main influential constituents

Authors： ZHAO Dan & WANG GuangCai

Journal：Science China- Technology Science》，January 2013 Vol.56 No.1: 129–136

Key Word：groundwater level, barometric pressure effect, water level correction,

influential constituents

Abstract：Changes in barometric pressure can affect the micro-dynamic state of groundwater level. The groundwater level data carry a lot of important information of tectonic activity and earthquakes. It is very significant to eliminate the barometric pressure effects from the groundwater level data in order to recognize seismic anomalies effectively. With the analysis of the main influential constituents of barometric pressure and their changes, we can have a better understanding of the changes of the aquifer medium, which can provide useful information for earthquake prediction. Taking the May 12, 2008 Wenchuan earthquake as an example, this paper deals with the influence of barometric pressure on groundwater level based on observational data from Nanxi, Qionglai and Chaohu wells. The methods of the linear regression and the deconvolution regression were employed to remove the barometric pressure from the groundwater level data. The harmonic analysis and the spectral analysis were used to recognize the main influential waves of barometric pressure effect. A comparison was conducted on the main influential waves before and after the earthquake. The results showed that the main influential waves of barometric pressure effect changed and the amplitudes of all constituents also changed. This phenomenon may result from the characteristics of the influential constituents of pressure, or from the changes of the aquifer medium, which were caused by the earthquake.

原文链接： http://tech.scichina.com:8082/sciEe/EN/abstract/abstract509617.shtml