[1] Because of transverse pore-scale dispersion, a mixing layer develops along the interface between a lighter fluid (fresh water) that flows toward a well or sink above a heavier fluid (seawater) in a steady axisymmetric configuration. The Peclet number characterizing mixing, Pe = L/aT, where L is the aquifer thickness and aT is transverse dispersivity, is generally much larger than unity. The...

A combination of geologic descriptions of cores, borehole geophysics, surfacegeophysical soundings and water-sample analyses was used to characterize flow in the surficial aquifer in the vicinity of Big Cypress National Preserve, Collier County, south Florida. The geophysical analysis augmented by aquifer tests and piezometer measurements showed that the surficial aquifer is under unconfined co...

On atoll islands, the fresh water lens (FWL) constitutes, for island population, a very important resource various usages. Its shape and thickness highly depend on underground characteristics of several rock formations which constitute island: upper Holocene sediments lower Pleistocene limestone rocks separated by Unconformity. In this study, simple investigation methods were applied Pacific Ra...

Groundwater is a reservoir of fresh water located beneath the ground surface in soil pore spaces and fractures lithology formations. contained aquifer layer has certain depth. Aquifer measurement was conducted with five tracks using AGI Super Sting R1 IP tool spacing 25 m track length 675 Balangan County. This study aims to determine 2D cross-sectional model, analyze types, depth, thickness, ty...

In this paper an attempt is made to offer insights into local slope failure mechanisms from the perspective of hydrogeology. The hypothesis examined envisages that the hydraulic conductivity distribution in a weathered profile includes a relatively high hydraulic conductivity zone associated with the jointed rock mass near rockhead. There is evidence locally for such a condition. The groundwate...

Failure behaviors of the floor rocks under coal seam mining in conditions hard magma rock roof and confined aquifer are studied. Based on theory stresses elasticity mechanics, combined effects abutment pressure induced by water thin aquicludes were considered, a mechanical model was constructed along strike working face. An analytical solution stress distribution derived rocks, distributions ve...

The calculation of the discharge to a constant drawdown well or tunnel in the presence of an infinite linear constant head boundary in an ideal confined aquifer usually relies on the numerical inversion of a Laplace transform solution. Such a solution is used to interpret constant head tests in wells or to roughly estimate ground water inflow into tunnels. In this paper, a simple approximate so...