ABSTRACT
The rate constant a is in the order of 10−5 cm s−1. It depends on temperature, pCO2 in the solution, the value V/A, flow conditions and whether the system is open or closed with respect to CO2. Values of a are reported by Buhmann & Dreybrodt (1985a, b), Dreybrodt (1988) for laminar flow, and for turbulent flow by Liu & Dreybrodt (1997). They can be used to estimate rates for many geological situations in karst (see Erosion Rates: Theoretical Models). Equation 4 is also valid for porous carbonate media with average pore diameter d (Baumann et al., 1985), provided that δ is replaced by V/A=0.15d.
