北方物流城地下水环境影响预测与评价

Prediction and Evaluation of Groundwater Environment Impact in North Logistics City

北方物流城在运行过程中会产生生产垃圾与生产废水、生活垃圾和生活污水,区域地下水环境质量较差,分析地下水流场变化特征,根据污染物排放情况,确定污染指标,设定污染情景和源强,采用Mod Flow三维水流模型和溶质运移模型对北方物流城地下水环境影响进行预测和评价,结果显示:区域内浅层潜水水质相对较差,主要超标污染物为硝酸盐氮和亚硝酸盐氮,含水层岩性为中粗砂和卵砾石,渗透性强,地下水流水力坡度大,污染物运移快,地下水极易受到污染,主要污染物为氨氮和CODCr。在无防渗或事故有防渗破裂情境下,浅层潜水会受到污染,如果叠加出现防渗层破损情况,造成地下水污染的风险会加大。为保护地下水环境提供科学依据。

In the running of north Logistics city,the waste water,domestic waste and domestic sewage are produced in the course. The quality of groundwater is poor. The characteristics of groundwater flow are analyzed,and the pollution index is determined according to the pollutant discharge. The effect of Mod Flow three-dimensional flow model and solute transport model on the groundwater environment in the north logistics city is predicted and evaluated. The results show that the shallow sub-water quality in the area is relatively poor,and the main pollutants are nitrate nitrogen and nitrite nitrogen,The lithology is coarse sand and gravel,the permeability is strong,the groundwater flow is large and the pollutants are moving fast,and the groundwater is highly polluted. The main pollutants are ammonia nitrogen and CODCr. In the absence of seepage or seepage failure due to the situation,shallow diving will be contaminated. if the superposition of impervious layer damage,the risk of groundwater pollution will increase,providing a scientific basis for the protection of groundwater environment.