Geochemical evaluation of the sources and movement of saline groundwater in coastal aquifers can aid in the initial mapping of the subsurface when geological information is unavailable. Chloride concentrations of groundwater in a coastal aquifer near San Diego, California, range from about 57 to 39,400 mg/L. On the basis of relative proportions of major-ions, the chemical composition is classif...

Transmissivity results from eight aquifer tests were used to derive horizontal hydraulic conductivity values for hydrogeologic units underlying the Sequim-Dungeness Peninsula in Clallam County. Specific-capacity information for the tested production wells also was analyzed to obtain a second hydraulic conductivity value for comparison against the "aquifer test" results. These paired estimates d...

Experiments in batch equilibrium system were carried out to evaluate the importance of physical and chemical factors determining the sorption efficiency of humic substances (HS) on aquifer material, which has been used for artificial recharge of groundwater (ARG) in drinking water production. Results showed that an increase of the amount of clay in the aquifer material and a decrease of pH in w...

Abstract Hydrogeologic systems in the southern Cascade Range California (USA) develop volcanic rocks where morphology, stratigraphy, extensional structures, and attendant basin geometry play a central role groundwater flow paths, groundwater/surface-water interactions, spring discharge locations. High-volume springs (greater than 3 m /s) from basin-filling (<800 ka) Hat Creek Fall River trib...

Aquifers are of particular interest in the vicinity rivers, lakes and coastal areas due to their extensive usage. Hydraulic properties such as transmissivity storativity can be deduced from periodical water level fluctuations both open bodies groundwater. Here, we model effect complex wave propagation into adjacent isotropic homogeneous aquifers. Besides confined aquifers, also study leaky aqui...

This paper investigates distribution behaviour of the carcinogenic compound vinyl chloride (VC) under semi-natural conditions in a three-phase system (air, water, and aquifer material). A stainless steel column was fi lled with quaternary aquifer material (gritty sand) from a contaminated site (Bitterfeld, Germany). VCcontaminated water with a defi ned concentration was prepared and pumped in s...

An aquifer stratification testing system was designed, constructed, and tested. The system was designed to characterize vertical profiles of both quantity and quality of water produced from actively pumping groundwater wells. During testing, all systems functioned properly and either met or exceeded anticipated performance requirements. The system was first tested in an irrigation well complete...

We show that the "dark condensates" arise when excitons form a Bose-Einstein condensate in material with an indirect bandgap are not completely dark to optical emission. Rather, such states "leaky which emission is facilitated by many-body interactions. analyze properties of these leaky condensates context twisted bilayers transition metal dichalcogenides, host strongly interacting and bandgap....