Figure 5
From: Predicting sedimentary bedrock subsurface weathering fronts and weathering rates
Measured seasonal water table depths and relations with weathering fronts at four locations along the hillslope flow transect. (a) Data of seasonally fluctuating water tables from four borehole locations, showing that the water table rises and falls synchronously along the hillslope, and the lowest water table depths in the 2018 are marked by the dashed-lines. The greater depth of the water table at PLM2 reflects the fact that its soil surface is elevated relative to the mean slope between PLM1 and PLM3,6. (b) The weathering fronts defined by τ-S, τ-pyrite and porewater SO42− concentration profiles (marked by the dashed-lines) consistent with the lowest seasonal water table depths.
