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2014年7月对淮北煤田主要河流及地下水系统采集20个水样,测试了水样中常规水化学及氢氧同位素含量,利用多元统计及传统图示方法探讨了水化学类型及水化学过程,并对水样适用性进行评价。结果表明,水样整体呈弱碱性,水样中TDS含量偏高,阳离子以Na++K+为主,阴离子以SO2-4和HCO-3为主,水化学类型主要为Na-SO4和Na-HCO_3型;水样具有较好的灌溉适用性,但处理前不宜直接饮用;水样δD在-53.07‰~-22.07‰之间变化,平均值为-38.30‰,δ18O在-6.97‰~-1.23‰之间变化,平均值为-4.09‰,受到了明显的蒸发作用影响,δD和δ18O关系方程为δD=5.21δ18O-16.90,可作为区域蒸发线的参考;Gibbs和主成分分析显示水样中元素含量特征主要受到岩石风化和蒸发作用的影响。
In July 2014, 20 water samples were collected from major rivers and groundwater systems in Huaibei Coalfield. The routine water chemistry and hydrogen and oxygen isotope content in water samples were tested. The water chemistry types and water chemistry processes were discussed by multivariate statistics and traditional graphical methods. And evaluate the suitability of water samples. The results showed that the overall water sample was weak alkaline with high TDS content in the water sample. The main cation was Na ++ K +, the main anion was SO2-4 and HCO-3, and the main water chemistry was Na-SO4 and Na -HCO_3 type; water samples have good applicability of irrigation, but should not drink directly before treatment; water samples δD between -53.07 ‰ ~ -22.07 ‰, with an average of -38.30 ‰, δ18O at -6.97 ‰ ~ 1.23 ‰, with an average value of -4.09 ‰. The relationship between δD and δ18O is δD = 5.21 δ18O-16.90, which can be used as a reference for the regional evaporation line. Gibbs and principal component analysis show that water samples The elemental content characteristics are mainly affected by rock weathering and evaporation.