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运用经典统计学及地统计学的方法,对伊犁河谷西部霍城县平原区地下水化学及空间变异特征进行研究。结果表明:HCO_3~-和Ca~(2+)是主要的水化学特征离子,含量稳定;从山前到下游平原区水化学分带性较明显,水化学类型由HCO_3-Ca-Mg渐变为HCO_3-SO_4-Ca型,最终过渡为HCO_3-SO_4-Ca-Mg型;地下水埋深和TDS主要受以自然条件为主的结构性因素影响,表现为强空间变异性,变异曲线分别符合指数模型和球状模型;埋深的空间分布更为均匀连续,自北向南呈带状变化;TDS与埋深在空间分布上存在一定相关性,高矿化度区均分布在地下水的浅埋区。
Using the methods of classical statistics and geostatistics, the characteristics of groundwater chemical and spatial variability in the Huocheng plain of western Ili Valley were studied. The results show that HCO_3 ~ - and Ca ~ (2 +) are the main hydrochemical characteristic ions with stable content. The chemical zonation of water from the piedmont to the downstream plains is more obvious, and the hydrochemical type is changed from HCO_3-Ca-Mg to HCO_3-SO_4-Ca type, the final transition is HCO_3-SO_4-Ca-Mg type. Groundwater depth and TDS are mainly affected by the structural factors that dominate the natural conditions, which are characterized by strong spatial variability and the variation curves conform to the exponential model And spherical model. The spatial distribution of buried depth is more uniform and continuous, changing from north to south. The spatial distribution of TDS and depth are related to each other. The high salinity areas are all distributed in the shallow groundwater areas.