2008年"5·12"地震后四川局部区域水体离子特征

2008年四川"5·12"地震对人民生命和生活造成巨大的破坏.为对震后水环境的现状进行一个面上的调查,2008年6月对受地震影响四川局部地区的水取样分析.对66个水样中8大离子的分析结果表明,水体中阳离子的含量特征均为Ca~(2+)>Mg~(2+)>Na~+>K~+,而阴离子平均含量依次为SO_4~(2-)>NO_3~->Cl~->PO_4~(3-).Ca~(2+)在水井中的含量最高,PO_4~(3-)在水体中含量最低,66个采样点中有16个水样未检出PO_4~(3-).井水中离子含量在所有采样区中最高.除PO_4~(3-)含量在河流中的含量最高外,其余各离子在水井中的含量居7个分类采样区之首;地裂缝渗出的水中Ca~(2+)、Na~+、Cl~-仅次于井水含量居第二.在空间位置上水体中Na/Ca比值在0.106上下波动.

The Characters of Ion Concentration in Sichuan After Earthquake Occurred on 12th May, 2008

The earthquake occurred in Sichuan province on May 12, 2008 was China's most devastating earthquake since the 1976 Tangshan earthquake catastrophe. The most immediate concerns after the disaster are human casualties, injury and property destruction. Water environment problems induced by the earthquake for human health and economic development are one of the primary concerns before the reconstruction after the disaster. Water was sampled in the earthquake-affected area in June, 2008 for detecting the ion concentration. The results of 66 water samples show that the cations concentration character is Ca~(2+)>Mg~(2+)>Na~+>K~+, while the anions' is SO_4~(2-)>NO_3~->Cl~-> PO_4~(3-). The highest concentration of Ca~(2+) is in the wells while the lowest concentration of PO_4~(3-) in all samples. PO_4~(3-) is not detected in the 16 of 66 samples.All ions except PO_4~(3-) concentration is the highest in the well. Ca~(2+) , Na~+ ,Cl~- in the ground fissures is higher than other regions except wells. The Na/Ca ratio fluctuates at 0. 106 in the all sampling areas.