The modeling of hydrocarbon reservoirs and of aquifer-aquitard systems can be separated into two activities: geological modeling and fluid flow modeling. The geological model focuses on the geometry and the dimensions of the subsurface layers and faults, and on its rock types. The fluid flow model focuses on quantities like pressure, flux and dissipation, which are related to each other by rock...

The first documented interpretation of the regional-scale hydrostratigraphy and groundwater flow is presented for a ∼21,000-km area of the arsenic-affected districts of West Bengal [Murshidabad, Nadia, North 24 Parganas and South 24 Parganas (including Calcutta)], India. A hydrostratigraphic model demonstrates the presence of a continuous, semi-confined sand aquifer underlain by a thick clay aq...

Arsenic contamination of groundwater in low-lying Bhagarathi–Ganga deltaic plain is known for more than two decades. The problem was recognized in 1984 (ref. 1) in West Bengal, when 16 patients from a village of 24 Parganas district reported arsenicosis. Subsequent investigations revealed extensive arsenic contamination in groundwater in the Bengal Basin affecting the eastern part of West Benga...

The project of interest involving a hydroelectrical diversion tunnel through crystalline rock massif in the Alps required detailed hydrogeological study to forecast magnitude water inflows within and possible effects on groundwater flow. exhibits length 9.5 km is located right side Toce River Crevoladossola (Verbania Province, Piedmont region, northern Italy). Under geological framework Alps, L...

Among the fastest sinking cities globally, metropolitan area of Mexico City is target an unprecedented satellite investigation based on over 300 Sentinel-1 Synthetic Aperture Radar (SAR) Interferometric Wide swath mode scenes acquired in 2014–2020. Two-pass differential SAR (InSAR) and parallelized Small BAseline Subset (SBAS) repeat-pass InSAR approach provide a complete account spatial patter...

Simulating flow and transport in layered geologic media comprising aquifers and aquitards still represents a challenge to current finite-difference modeling techniques. In aquifers, the flow direction is usually horizontal and accurate simulation requires a sufficiently fine horizontal discretization. In aquitards, the flow direction is often vertical which requires grid refinement in the verti...

A detailed field-scale investigation of processes controlling the architecture, persistence and dissolution of a 20 to 45year old trichloroethene (TCE) dense non-aqueous phase liquid (DNAPL) source zone located within a heterogeneous sand/gravel aquifer at a UK industrial site is presented. The source zone was partially enclosed by a 3-sided cell that allowed detailed longitudinal/fence transec...

not available. Determining and Mapping DNAPL Saturation Values from Noninvasive GPR Measurements Sneddon, K.W. and G.R. Olhoeft (Colorado School of Mines, Golden); M.H. Powers (U.S. Geological Survey, Denver, CO). SAGEEP 2000: Symposium on Application of Geophysics to Environmental and Engineering Problems, 21-25 February 2000, Arlington, VA. Environmental and Engineering Geophysical Society, W...