Nonlinear Flow in Karst Formations
The variation of effective hydraulic conductivity as a function of specific discharge in several 0.2-m and 0.3-m cubes of Key Largo Limestone was investigated. The experimental results closely match the Forchheimer equation. Defining the pore-size length scale in terms of Forchheimer parameters, it is demonstrated that significant deviations from Darcian flow will occur when the Reynolds number exceeds 0.11. A particular threshold model previously proposed for use in karstic formations does not show strong agreement with the data near the onset of nonlinear flow.
Chin, D.A., R.M. Price, V.J. DiFrenna. 2009. Nonlinear Flow in Karst Formations. Ground Water 47(5): 669-674.