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1983年11月7日,山东省菏泽发生5.9级地震,11月 13日至20日,我们在极震区及其附近地区利用野外水化分析车,对地下水中某些化学组分和气体组分进行了现场观测。本文对震中区地下水中CO_2的观测结果作一介绍。 观测区与实验方法 1.观测井孔的选择 根据现场宏观调查,确定观测井孔的范围以极震区(Ⅶ度区)为主,并在此基础上略有扩展(图1)。观测井孔大致分布在南北28公里、东西48公里的两条垂直线上,共28
On November 7, 1983, an earthquake of magnitude 5.9 occurred in Heze, Shandong Province. From November 13 to 20, we used a field hydration analysis vehicle in and around the meizoseisme area to study some chemical components and gas groups in groundwater Points were observed on the spot. This paper presents the observation results of CO_2 in groundwater in epicenter area. Observation Area and Experimental Method 1. Selection of Well Borehole According to the site macro survey, it is determined that the range of borehole observation is dominated by the extremely severe earthquakes (area VII), and based on this, a slight expansion is made (Figure 1). Observation wells are roughly distributed in two vertical lines 28 km north and south, 48 km east and west, a total of 28