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依据关中盆地内487组水质检测数据,在深入分析关中盆地地下水流场、补给径流排泄条件和地下水环境状况的基础上,对研究区进行了较为详细的地下水环境单元划分,运用迭代标准差法和计算分布函数法,求取了关中盆地潜水主要常量组分K~++Na~+、Ca~(2+)、Mg~(2+)、Cl~-、SO_4~(2-)、HCO_3~-、TDS的环境背景值,分析了各组分背景值的空间分布规律及形成因素。结果表明:地下水补、径、排条件和水文地球化学作用对区内主要常量组分背景值的空间分布起主要控制作用,其中区内阴离子以HCO_3~-为主,阳离子渭河北岸以K~++Na~+为主,渭河南岸以Ca~(2+)为主;在渭河以北地区水文地球化学作用主要以矿化和蒸发浓缩作用为主,渭河以南地区以溶滤作用为主。其结果为关中盆地地下水污染评价、水资源开发与保护等提供了科学依据。
Based on the 487 sets of water quality testing data in the Guanzhong Basin and on the basis of in-depth analysis of groundwater flow field, discharge runoff discharge conditions and groundwater environmental conditions in the Guanzhong Basin, the groundwater environment units are divided in more detail. Iterative standard deviation method and The distribution function method was used to calculate the K +, Na +, Ca ~ (2 +), Mg ~ (2 +), Cl ~ -, SO_4 ~ (2 -), HCO_3 ~ -, TDS environmental background values, analysis of the spatial distribution of each component of the value of the law and the formation of factors. The results show that the groundwater recharge, runoff and drainage conditions and hydrogeochemistry play a major role in controlling the spatial distribution of the background values of major constants in the area. The anions in the area are mainly HCO_3 ~ + Na ~ + is the dominant species, while Ca2 + is dominant on the southern bank of Weihe River. The hydrogeochemistry in the area north of the Weihe River is mainly dominated by mineralization and evaporation, while the south of the Weihe River is dominated by leaching and filtration. The results provide a scientific basis for the assessment of groundwater pollution in the Guanzhong Basin and the development and protection of water resources.