Stratification of reactivity determines nitrate removal in groundwater

Abstract : Although groundwater is a critical source of drinking water and irrigation, it has been polluted worldwide by agriculture, industry, and domestic activity. Because assessing groundwater quality and recovery rates is challenging, we developed a method for determining where and how quickly nitrate is removed in aquifers using just a few point measurements of groundwater chemistry. This methodology opens new avenues for characterizing catchment-scale nutrient dynamics, including nitrogen, carbon, and silica, with existing datasets for ecosystems around the globe. Understanding the subsurface structure of reactivity would also improve estimates of recovery time frames for polluted ecosystems and inform sustainable limits for anthropogenic activity.
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Submitted on : Wednesday, January 30, 2019 - 10:02:09 AM
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Tamara Kolbe, Jean-Raynald de Dreuzy, Benjamin Abbott, Luc Aquilina, Tristan Babey, et al.. Stratification of reactivity determines nitrate removal in groundwater. Proceedings of the National Academy of Sciences of the United States of America , National Academy of Sciences, 2019, 116 (7), pp.2494-2499. ⟨10.1073/pnas.1816892116⟩. ⟨insu-01999430⟩



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