“…These developments allow a variety of processes to be considered, such as flow and transport processes, ion exchanges, biogeochemical reactions, and the interplay between primary mineral dissolution and secondary mineral precipitation (Moore et al, 2012;Lebedeva and Brantley, 2013;Ackerer et al, 2018). Reactive transport models have been used to explore a wide variety of scientific issues, including the study of global atmospheric CO 2 consumption by weathering reactions (Goddéris et al, 2013;Li et al, 2014), the formation and evolution of soil and regolith profiles (Maher et al, 2009;Navarre-Sitchler et al, 2009;Lebedeva and Brantley, 2013), and the variability of water quality and chemistry in the environment (Lucas et al, 2010(Lucas et al, , 2017Ackerer et al, 2018). However, these approaches usually rely on a simple 1D flow path through a regolith column or along a hill slope to model flow in the system (e.g., Maher, 2011;Moore et al, 2012;Lucas et al, 2017;Ackerer et al, 2018).…”