... relatively simple drains in landfill sites where presumably a slotted pipe is installed within a casing string and the casing removed. Directional Drilling hydraulic fracturing wellscreen cross passage pore pressure sub horizontal drilling operation hydraulic gradient knowledge management...

... data. IDEALIZATION OF THE PROBLEM We consider an isolated crack at the core-filter interface. Erosion in the crack occurs as a result of flow caused by local hydraulic gradients. This may occur via different mechanisms. The simplest mechanism is surface traction. Erosion is initiated when the flow...

... sand and clay layers (Bouckovalas et al. 1999). hydraulic gradient stable water film investigation educational setting silt seam Earthquake upper layer mechanism middle layer Reservoir Characterization Thickness submarine slide lower layer sand layer settlement water film time...

... Upstream Oil & Gas structural geology Lugeon value seepage control Reservoir Characterization Fluid Dynamics injection pressure water level abutment water pressure test leakage tuff flow in porous media relation hydraulic gradient kg cm2 drill hole seepage flow lithofacies...

... fluidization velocity as well as the undisturbed Shirasu samples and fallen pumice samples were investigated on the failure resistance against various hydraulic gradients. Secondly, a model experiment and some finite element analyses were performed aiming at investigating the seepage actions to the tunnel...

... (1951) has developed the concept of the critical hydraulic gradient for sandy soil at which the seepage force and the sub- merged weight is balanced. Moreover, Zas- raysky & Kassiff (1965) have paid attention to the balance mentioned above for the case of cohesive soil. Recently, Nobari, Lee and Duncan...