A Phreatic Line A phreatic line is a groundwater flow line that is perpendicular to the contour of a water table. It represents the direction of the water's...
A Phreatic Line
A phreatic line is a groundwater flow line that is perpendicular to the contour of a water table. It represents the direction of the water's movement and is an important concept in hydrogeophysics.
Example: The phreatic line for a confined aquifer would follow the contour of the water table, while the phreatic line for an unconfined aquifer would follow the contour of the potentiometric surface.
Phreatic lines are also used in groundwater modeling to represent the direction of groundwater flow and to calculate the hydraulic gradient. They are also used to determine the hydraulic conductivity of a soil or rock, which is a measure of its ability to transmit water