How do we know which direction ground water will flow?

Question

Quizplus · Accepted Answer

Groundwater flow is generally perpendicular to the water table contours, in a downhill direction. This is because groundwater flow is driven by gravity and follows the path of least resistance. The slope of the water table reflects the slope of the land surface, so groundwater flows from higher elevations to lower elevations. This is why it is important to understand the topography of an area in order to determine the direction of groundwater flow. Tracer tests may be used to confirm or refine the direction of groundwater flow, but the general direction can usually be determined based on topography.

How Do We Know Which Direction Ground Water Will Flow