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地下水中的二氧化碳气体作为一种地震前兆信息曾有过简单的报道,但一直未得到较好的震例。我们于1975年11月开始对天津市的津二、棉四、张道口三口热水井的地下水每日取样采用气相色谱法分析其气体组分。地下水中二氧化碳变化的情况:津二井背景值为7.0—8.50 ml/L,最高值为14.67ml/L(3月1—5日均值);棉四井背景值为1.0—1.80ml/L,最高值为8.31ml/L(3月20—25日均值);张道口井背景值为13.00—15.00 ml/L,最高值为33.03ml/L(2月1—5日均值)。从上述所得结果来看,二
Carbon dioxide gas in groundwater has been briefly reported as a kind of earthquake precursory information, but it has not been well reported yet. In November 1975, we started daily sampling of groundwater in hot water wells of Jin 2, Mian 4, and Zhang Dakou in Tianjin and analyzed the gas composition by gas chromatography. The change of carbon dioxide in groundwater: the background value of Jin 2 well was 7.0-8.50 ml / L, the highest value was 14.67 ml / L (March 1-5 average value); the background value of cotton four wells was 1.0-1.80 ml / L, the highest The value of 8.31ml / L (March 20-25 average); Zhangdao well background value of 13.00-15.00 ml / L, the highest value of 33.03ml / L (February 1-5 average). From the above results, two