Abstract A system of borehole heat exchangers (BHEs) combined with pumping–injection wells is established in areas where the groundwater shallow and seepage velocity weak. The pumping injection are set on both sides BHEs. According to three-dimensional unsteady-state transfer model aquifer, convection–dispersion analytical solution excess temperature derived that considers groundwater-forced th...

In Europe, 1132 Mt of sand and gravel were mined in 2019, which causes major changes to the hydrogeological cycle. Such may lead significantly raised or lowered groundwater levels. Therefore, aggregate sector has ensure that impacts on existing environmental water infrastructures are kept a minimum post-mining phase. risk assessments often made by empirical methods, based assumptions do not mee...

Numerical simulations are important tools for the assessment of exploiting geothermal energy in heat pump applications. They can be used to evaluate performance system, long-term production scenarios and sustainability reservoir. The present work introduces describes a numerical model, which dedicated Matlab® script has been realized allow sequentially coupled shallow reservoir system. A mathem...

At the European scale, nitrate concentration is the most important parameter that determines groundwater quality. Since in most cases nitrate input into the aquifer is a non-point source pollution problem, measures to reduce nitrate leaching have to be designed on the aquifer scale. In this context we have coupled the unsaturated, vertical soil water and nitrogen transport model SIMWASER/STOTRA...

The number of Slinky-coil horizontal ground heat exchangers (HGHEs) has been increasing in geothermal heat pump (GHP) systems due to the low initial cost. The performance of the Slinky-coils, however, has not been successfully predicted with good accuracy since the complicated shape of the Slinky-coils is not easy to model either analytically or numerically. To enable this, Fujii et al. (2012) ...

Several investigations have recently considered the possible impacts of climate change and seawater level rise on seawater intrusion in coastal aquifers. All have revealed the severity of the problem and the significance of the landward movement of the dispersion zone under the condition of seawater level rise. Most of the studies did not consider the possible effects of the seawater rise on th...