Abiotic Mixing‐Dependent Reaction in a Laboratory Simulated Hyporheic Zone

Abstract Groundwater (GW) contaminants upwelling toward surface water (SW) can attenuate in the hyporheic zone, with dissolved oxygen (DO) frequently controlling the attenuation. In a laboratory mesocosm, we induced downwelling of SW into the sediments to create a hyporheic flow cell (HFC). We added DO to downwelling SW and sodium sulfite (Na2SO3) to anoxic upwelling […]