Impact of Rock Weathering on the Chemical Composition of Groundwater Determined by Inverse Modeling in Large Sedimentary Basins

Large scale cavity dissolution: From the physical problem to its numerical solution

“…(ρ l ω Al v l − ρ l D Al ∇ω Al ) · n ls = ρ s ω As (v s − w) · n ls at Γ ls (5) where n ls represents the normal vector at the liquid-solid interface, and w the velocity of the interface. The total mass balance at the solid-liquid interface gives:…”

“…Cavity dissolution problems are very common in fluid-solid systems, for instance, karstification [1], mining [2], CO2 storage [3,4], rock weathering by flowing groundwater or other chemical solutions [5,6], etc. In these cases, the growth of underground cavities may cause geological disasters and environmental problems [7][8][9]; thus, accurate description and prediction of such phenomena are crucial for risk analysis.…”

Geochemical fingerprinting and source discrimination of agricultural soils at continental scale

“…15 Therefore, sodium has been used as a reference element in studies of weathering processes (Négrel et al, 1993(Négrel et al, , 2013Gaillardet et al, 2003;Yang et al, 2004), and for defining weathering indices in suspended sediments (e.g., mobility; Gaillardet et al, 1999). In suspended sediments of large rivers, the Na weathering index is always greater than unity indicating that suspended sediments are depleted with respect to UCC, whereas the weathering indices of Ca and Mg usually exhibit values less than one, reflecting the presence of carbonate in the suspended sediment.…”