Evaluation of the impact of an uncontrolled landfill on surrounding groundwater quality, Zhoukou, China

摘要: Our groundwater pollution investigation of an uncontrolled municipal landfill aims to better understand the possible impact leachate percolation on quality. The study examined inorganic contamination around a site in Zhoukou city, Henan province, China. Stable isotopic compositions (18O and 2H) concentrations various physico-chemical parameters were determined surface samples collected from area. 18O 2H reveal that elevation effects and/or evaporative processes occur extents prior water reaching saturated zone. There is no serious heavy metal this Principal component analysis was applied, identified TDS, Cl-, NH4+, Fe Mn as main indicators caused by percolation. quality shallow aquifer likely dominated irrigation return flow summer. A two-dimensional advective-dispersive transport model established using MODFLOW MT3DMS explore controls contaminant transport. Chloride simulations with steady state transient models show plume still constrained upper after 13years operation landfill. contrast between simulated (relatively short) migration distance chloride plume, widely observed high indicate other local contributions salinity aquifer. indicates seasonal dynamics, such temporal level variations, may have great influence beneath controlling vertical hydraulic gradients fluxes. In general, (within 30m depth) not suitable for drinking, control should be improved enhanced 2013 Elsevier B.V.