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一、地下水异常 唐山地震前地下水宏观异常的数量较多,据不完全统计,异常共868起,出现异常的水井为716口。异常分布在唐山、天津、廊坊、沧州、北京、承德、辽宁和山东等八个地区,唐山地区最多(576起),其次是廊坊地区(105起)。异常的种类多,可归纳为上升、下降、发浑变色、冒泡发响、变味、冒油花、水温增减和其他变化等八种。其中最重要的异常是上升、下降、发浑变色和冒泡发响等四种,这四种异常占总异常数的88.5％,其余四种仅占11.5％。
First, abnormal groundwater Before Tangshan earthquake more groundwater macro anomalies, according to incomplete statistics, a total of 868 anomalies, abnormal wells for the 716 mouth. Abnormally distributed in Tangshan, Tianjin, Langfang, Cangzhou, Beijing, Chengde, Liaoning and Shandong and other eight regions, the largest number of Tangshan (576), followed by the Langfang region (105). Abnormal types and more can be summarized as rising, falling, muddy discoloration, bubbling sound, odor, oil flowers, water temperature changes and other changes in eight. Among them, the most important anomalies are ascending, descending, muddy, discolored and bubbling. The four anomalies account for 88.5% of the total anomalies and the remaining four account for only 11.5%.