|Oldham, C; Beer, J; Blodau, C; Fleckenstein, JH; Jones, Lydia; Neumann, C; Peiffer, S (2019): Controls on iron(II) fluxes into waterways impacted by acid mine drainage: A Damköhler analysis of groundwater seepage and iron kinetics, Water Research, 153, 11-20, DOI: 10.1016/j.watres.2018.12.024|
|Key words: Reactive transport; Sediment water interface; Mine lake; Acidity generation;|
When acidic groundwater flows into an aquatic system the sediment water interface (SWI) acts as a transition zone between the groundwater and lake water, and often exhibits strong physical and biogeochemical gradients. The fate of groundwater-borne solutes, such as Fe(II), is determined by the balance between the exposure time during transport across the SWI and the reaction time within the SWI, however the relative role of groundwater seepage rates and iron kinetics on acidity generation in lakes is unknown. Porewater seepage velocities, porewater chemical profiles, and limnological data were collected across multiple field campaigns over the last two decades, in acid Mine Lake 77, in Lusatia, Germany.