Hydrodynamic conditions in stable subaerial regions

The hydrodynamic condition in a stable subaerial region is given by the characteristics of the prevailing gravity-induced groundwater flow systems. 

The present-day groimdwater flow systems in the selected study area may not be in accordance with the relief of the present-day water table, and as a consequence the characteristics of the flow system cannot be reliably inferred solely from water table relief and subsurface permeability distribution. A direct determination of the quantitative characteristics of the present-day gravity-induced groundwater flow system, requires data on pressure, density and viscosity of groundwater and data on the permeability distribution 

T6th (1978) proposed an analysing technique for the quantitative assessment of cross-formational gravity-induced groundwater flow systems and the genetic explanation of the identified systems, based on the integrated interpretation of the following five pressure-related parameters  

The dynamic pressure increment, Ap at a certain depth is the difference between the hydrostatic and the hydrodynamic pressure-depth relation at that depth (T6th, 1978). T6th (1978) showed that the dynamic pressure increment is a function of both ground surface elevation and depth of measurement. He proposed the use of a two-dimensional presentation of this relation (the elevation-depth pattern Ap,-z-d) as an analysing tool. The elevation-depth 

Regionally confined aquifer Shape and position of groundwater potentiometric surface are independent of configuration shown portion of basin s ground surface 

---