Sources of oxygen flux in groundwater during induced bank filtration at a site in Berlin, Germany

摘要: The microbial degradation of pharmaceuticals found in surface water used for artificial recharge is strongly dependent on redox conditions the subsurface. Furthermore durability production wells may decrease considerably with presence oxygen and ferrous iron due to precipitation trivalent oxides subsequent clogging. Field measurements are presented at a bank filtration site Berlin, Germany, along simplified calculations different pathways into groundwater. For two-dimensional vertical cross-section, input has been calculated six scenarios related management strategies. Calculations were carried out order assess amount (1) infiltration oxic lake water, (2) air entrapment as result table oscillations, (3) diffusive flux from soil (4) infiltrating rainwater. results show that during winter constitute by far most important mechanism input. Oxygen percolating rainwater delivery gas phase negligible. exemplify importance well determining factor oscillations recharge.