By Hydrosimulatics INC  

The following paragraph and three figures were adapted from content presented by the International Associatoin of Hydrogeologists:   


Decades of groundwater hydrology research and modeling has demonstrated that flow in the subsurface environment is complex. It consists of shallow and deep flow systems; it is multiscale - a hierarchical system or system of systems. Such flow systems render moving groundwater a universal geologic agent. As such, they are active ubiquitously and simultaneously to great depths in the Earth’s crust. Individual flow systems exert a polarizing effect of natural hydrological, physical, chemical, botanical, thermal, biological, etc., processes and phenomena between their recharge and discharge ends with transitional ones in between. (see Figures 1-3).