水氡突变中的干扰问题

本文根据近年来我们在现场开展水氡干扰因素试验研究的结果,集中论述了当前视为较好临震指标的水氡突跳中的各类干扰因素及其原因。指出气象因素(如降雨等)、地质因素(如滑坡)、水文地质因素(包括水动力条件的改变)、水点自然环境因素(包括出露条件)以及某种偶然因素等都可程度不同的引起水氡突变,必须因泉(井)制宜的开展试验,掌握并排除干扰,才能有效的突出地震异常。我们还就识别、排除干扰的方法作了探讨,提出在构造区域范围内布点,开展多点水化(氡、气和其他化学组分)综合观测、试验、研究,是识别干扰和判断地震异常的有效方法。

DISCUSSION ON THE INTERFERENCES ACCOMPANIED WITH THE SUDDEN CHANGE OF RADON CONTENT IN GROUND WATER

At present, the sudden change of radon content in ground water is regarded as a better index of immediately prior to the occurrence of earthquake. In this paper, our discussion will centre on the interferences presented in the sudden change of radon and their causes.Based on the experimental results obtained from the field test station of radon measurement, we point out that many factors, such as methorological (rainfall), geological (landslip), hydrogeological (change of the hydrokinetical condition), environment of spring site(outcrop condition) and other accidental factors can lead to the mutation of radon content. For this reason we must take suitable measures to learn springs(wells) conditions so as to carry out the observation. only when the interferences are removed the precusor anomalies become may outstanding.In this paper, we have also made discussion on the methods of distinguishing and eliminating the interferences. It is fully proved that to set up the hydrochemical station in the tectomic region and carry out comprehensive hydrochemical observation and research (including rodon dissolved gas and other chemical components)at more stations is an effectual way to identify interferences and define out the way forward for developing earthquake prediction by hydrochemical method.