青海地区水文地质条件对水体铬污染的控制作用研究

Control Effect of Hydrogeological Conditions on Water Chromium Pollution in Qinghai Area

研究采用主成分分析法选择青海地区研究区域水体中污染贡献了最大的六价铬成分,并对其分布、迁移、释放规律进行了深入分析;运用青海地区研究区域地下水动态长期观测井采集到的观测数据,同时采用Visual-MODFLOW软件对这些观测数据进行分析,模拟预测六价铬污染物在青海地区地下水中的迁移、分布、释放规律,建立青海地区天然状态下地下水水流模型;采用经验估算法和实验测量法选取水流模型渗透系数张量,建立青海地区天然状态下地下水水质模型;根据《地下水质量标准》,将青海地区天然状态下地下水污染程度划分为5类。

The exhaust gas,waste water and waste slag in the atmosphere will enter the water body along with precipitation and surface runoff,increasing chromium ions in the water body.They will seriously pollute the water environment.The principal component analysis method was used to select the hexavalent chromium component,which contributed the most pollution in the waters of the research area in Qinghai,and the distribution,migration and release rules were analyzed in depth.The long-term observation wells of groundwater dynamics in the study area of Qinghai area were collected.This study observes the data and uses Visual-MODFLOW software to analyze these observation data,simulate and predict the migration,distribution and release of hexavalent chromium pollutants in groundwater in Qinghai,and establishes the groundwater flow model under natural conditions in Qinghai.The empirical estimation method and the experimental measurement method were used to selects the permeability coefficient tensor of the water flow model to establish the groundwater quality model in the natural state of Qinghai.According to the“Groundwater Quality Standard”,the groundwater pollution degree in the natural state of Qinghai is divided into five categories.