沈阳石蜡化工有限公司厂区地下水污染模拟预测

根据沈阳石蜡化工有限公司厂区水文地质条件以及周边农业灌溉等废水排放条件,并分析地下水污染机理,建立了地下水溶质运移数学模型,预测地下水水质时空变化特征.将含水层概化为单层非均质不等厚各向同性的二维非稳定潜水渗流系统,模拟因子确定为石油类,向水源地的运移概化为二维对流-弥散运动.模拟区边界按一类边界处理,并在厂区位加一虚拟点污染源.预测结果表明,未做防渗层条件下,随着开采时段的增长,区内各节点浓度逐渐增高,其变化幅度在近河近开采井地段较明显,但未出现预警浓度（0.05mg/L）;加防渗层后,石油类浓度相对于原背景值将大幅减小.

Simulation Forecasting of Underground Water Contamination at Factory District of Shenyang Paraffin Wax Chemical Limited Company

According to hydrogeological conditions at factory district of Shenyang Paraffin wax Chemical Limited Company as well as wastewater discharging conditions of peripheral agricultural irrigation,the underground water contamination mechanism was analyzed;the ground water solute migration mathematical model was established;and the temporal and spatial variation characteristic of ground water quality was forecasted.The aquifer was generalized single layer and non-homogeneous and unequal thickness and isotropic two-dimensional unsteady infiltration flow underwater system,the simulation factor was determined for petroleum classes,the movement to the water source place was generalized the two-dimensional convection-dissemination movement.The simulation boundary area was treated as the first kind area,and a hypothesized point pollution source was added at the plant area.The forecasting result indicates that under the non-impermeable layer condition,the density of every spot in the area has been gradually increasing along with the mining time＇s growth.Its rangeability was very obvious at near river and near mining well sector,but warning density（0.05 mg/L） was emerged;After constructing a impermeable layer,the density of petroleum class was significantly reduced relatively to the original background value.