Abstract In this work, we propose a mathematical model to depict the conversion of groundwater flow from confined unconfined aquifers. The problem occurs due heavy pumping aquifers over time, which later leads depletion an aquifer system. phenomenon is interesting one, hence several models have been developed and used capture process. However, one can point out that has limitations its own, as ...

Groundwater pollution has become a worrisome phenomenon, mainly for aquifers underlying industrialized areas. In order to evaluate the risk of pollution, a model of the aquifer is needed. Herewith, we describe a quasi-tridimensional model, which we applied to a multilayered aquifer where a phreatic aquifer was coupled to a confined one by means of an aquitard. This hydrogeological scheme is oft...

Until recently, few water utilities or researchers were aware of possible virus presence in deep aquifers and wells. During 2008 and 2009 we collected a time series of virus samples from six deep municipal water-supply wells. The wells range in depth from approximately 220 to 300 m and draw water from a sandstone aquifer. Three of these wells draw water from beneath a regional aquitard, and thr...

The presence of ecotones in transition zones between geological strata (e.g. layers gravel and sand interbedded with silt distal alluvial fan deposits) aquifers plays a significant role regulating the flux matter energy compartments. Ecotones are characterised by steep physicochemical biological gradients considerable diversity. However, link organic pollutants degradation potential has scarcel...

Contrary to the normally observed increase in groundwater radon that occurs prior to earthquakes, we have measured anomalous decreases in radon concentration prior to the 2003 MW1⁄4 6.8 Chengkung and 2006 MW1⁄4 6.1 Taitung earthquakes that occurred within a 55 km radius from the Antung D1 monitoring well in eastern Taiwan. The v-shaped pattern of radon anomalies recognized at Antung is valuable...

AbstractThinning or localized absence (a breach) of an aquitard warrant concern because this limits the protection it affords water-supply aquifers beneath. The objective study was to asses...

Abstract Coastal groundwater reservoirs are sensitive to the complicated evolution of marine transgressions and regressions in river delta regions. We integrated hydrogeological investigation hydrogeochemical data with numerical modeling assess system Pearl River Delta’s aquifer (in southeastern China). studied effects flow dynamics redox conditions on biogeochemical processes nutrients regiona...

High-temperature reservoir thermal energy storage (HT-RTES) has the potential to become an indispensable component in achieving goal of net-zero carbon economy, given its capability balance intermittent nature renewable generation. In this study, a machine-learning-assisted computational framework is presented identify HT-RTES site with optimal performance metrics by combining physics-based sim...

In his reports on the regional hydrogeology of the central Great Plains, in particular southeastern Colorado and southwestern and central Kansas, Darton considered the Dakota aquifer to be a classic example of an artesian system. Computer simulations of the flow system in this study, however, suggest that the Dakota is not a regional artesian aquifer in the classic sense. Sensitivity analysis o...