【摘要】 研究区位于潮白河冲洪积扇中上部,第四系松散孔隙含水层颗粒粗大,易接受补给,地下水固有防污性能处于差和较差,地下水水质整体良好。采用数值模拟方法,建立了三维地下水流数值模型,对孔隙度、弥散系数进行了率定,利用GMS中的MT3DMS模块建立了溶质运移模型。选取COD作为模拟指标,根据模型对水厂投产30年后两种不同情景方案下地下水水质状况进行了预测分析。结果显示,在正常工况和处理流程出现故障两种条件下,再生水厂对周围地下水环境有一定程度影响,但重点研究区内地下水模拟浓度远小于《地下水质量标准》中Ⅲ类水标准,污染物浓度虽低,影响距离却很远,因此要建立覆盖全厂区的地下水长期监控系统,避免污染事故。更多还原

【Abstract】 The study area is located in the upper of the Chaobai River alluvial. Because of the coarse particle size, Quaternary aquifer is easily recharged. Groundwater intrinsic antipollution capability of this area is poor. Groundwater quality is good in general. The index COD is chosen to predict and evaluate the effects of a proposed water recycling plant operation on groundwater in the source area by building up numerical model. The plant may have certain effect on the groundwater environment both in cases of normal operation and during process failures. The forecasting COD concentrations in the groundwater source area are far below the Class III water standard in Standard for Groundwater Quality, but the influence distance is long, therefore a long-term monitoring system covering the whole plant area should be build to avoid pollution.更多还原