Kolbe, Tamara; de Dreuzy, Jean-Raynald; Abbott, Benjamin W; Aquilina, L; Babey, T; Green, C; Fleckenstein, JH; Labasque, T; Laverman, AM; Marçais, Jean; Peiffer, S; Thomas, Zahra; Pinay, G: Stratification of reactivity determines nitrate removal in groundwater, Proceedings of the National Academy of Science USA (2019), doi:10.1073/pnas.1816892116 | |
Key words: groundwater; dentrification; reactivity pattern; transit times; reaction times | |
Abstract: Biogeochemical reactions occur unevenly in space and time, but this heterogeneity is often simplified as a linear average due to sparse data, especially in subsurface environments where access is limited. For example, little is known about the spatial variability of groundwater denitrification, an important process in removing nitrate originating from agriculture and land use conversion. Information about the rate, arrangement, and extent of denitrification is needed to determine sustainable limits of human activity and to predict recovery time frames. Here, we developed and validated a method for inferring the spatial |