定襄泉水氡正常和异常动态特征及其相互关系的研究

Study on normal and anomalous dynamic characteristics of radon and its relation in Dingxiang Spring

系统分析了定襄泉水氡的正常与异常的动态变化。定襄水氡具有“正弓型”年变化;依据其主要的影响因素,一个水文年内可分出气温影响期和降水-径流影响期;水氡还有季节性短期变化和多年周期变化。采用“改进从属函数法”,其定襄水氡异常与华北多次强震有明显对应关系;前兆异常变化具有破年变、相关关系改变及多年周期性等特点,可作为震兆性质的动态判断标志;正常与异常动态有着相同与不同点,表明两者间具有一定的成因联系。

The normal and anomalous dynamic changes of radon in Dingxiang spring are systematically analyzed. The radon in Dingxiang Spring shows annually positive bow shaped change. According to the main influence factors, a hydrological year could be divided into a temperature influence period and a precipitation-pathway stream influence period. The water radon changes seasonally in the short-term and periodically in many years. By using the method of improved hypotaxis function relation, the anomaly of radon in Dingxiang spring is evidently correlated to several strong earthquakes in North China. The change of precursory anomaly was of characteristics of broken-annual change, the correlation change, as well as periodical change in many years and so on, which could act as dynamic judgment symbol of the nature of earthquake precursors. There are similarities and differences between the normal and the anomalous dynamics, indicating that there might be a certain causative relation between them.