基于解析法的某废润滑油仓储项目地下水环境影响评价

Environmental Impact Assessment of Groundwater in the Waste Lubricating Oil Storage Based on Analysis Method

地下水环境影响评价是环境影响评价工作中一个重要的专题工作。通过资料收集、水文地质调查、水文地质钻探、现场水文地质试验、水样采集与测试、水位水质监测井建设等工作,获取研究区水文地质条件、水文地质参数、含水岩组特征、地下水水质情况。假定在非正常工况下,利用解析法模型,模拟渗漏污染物在地下水中的运移规律,预测污染物在地下水环境中的污染程度,在一定时间序列的扩散影响范围以及迁移趋势。结果表明:生活污水发生渗漏时,地下水中污染物氨氮、COD的浓度均超标。发生渗漏500 d后,地下水中污染物氨氮的浓度才显示未超标,发生渗漏1000 d后,地下水中污染物COD的浓度才显示未超标;生产废水发生渗漏时,地下水中污染物石油类、COD的浓度均有超标。发生渗漏1000 d后,地下水中污染物COD的浓度才显示未超标,发生渗漏10000 d后,地下水中污染物石油类才显示未超标。

Groundwater environmental impact assessment is an important work in the environmental impact assessment.Through data collection,hydrogeological survey,hydrogeological drilling,on-site hydrogeological test,water sample collection and testing,constructions of the water level and water quality monitoring well and other work,this paper obtains the hydrogeological conditions,hydrogeological parameters,water-bearing rock group characteristics,and groundwater quality in the study area.Assuming that the project is under abnormal working conditions,using the analytical model,to simulate the migration law of leakage pollutant solute in groundwater,predict the pollution degree of pollutant in groundwater environment,the diffusion infl uence range and migration trend in a certain time series.The results showed that the concentration of NH3-N and COD in groundwater exceeded the standard when domestic sewage was leaking.After 500 days,the concentration of NH_(3)^(-)N in groundwater does not exceed the standard,After 1000 days,the concentration of COD in groundwater does not exceed the standard.When the production wastewater is leaking,the concentration of polluta nts such as oil and COD in groundwater exceeded the standard.After 1000 days,the concentration of COD in groundwater does not exceed the standard.After 10000 days,the oil pollutants in groundwater showed that they did not exceed the standard.