Under what conditions does the Frimpter Method use a special equation to estimate high groundwater?

The Frimpter Method applies a special equation for estimating high groundwater in coastal areas due to the unique hydrological dynamics that exist in these regions. Proximity to the coast introduces the influence of both freshwater and saltwater interactions, particularly the phenomenon known as saltwater intrusion. This interaction necessitates a distinct approach to accurately assess groundwater levels and flow patterns.

Coastal areas are subject to tidal influences, which can alter groundwater elevations and create fluctuating water tables. The Frimpter Method effectively accounts for these variations by applying equations that consider the effects of tidal cycles, saltwater intrusion, and the permeability of the coastal soil. This is critical for effective groundwater management, especially in areas where freshwater is limited and must be protected from contamination by saltwater.

In contrast, areas far from the coast, mountainous regions, and arid environments typically do not exhibit the same levels of complexity in groundwater interactions as coastal regions. Thus, they do not require the specialized equations that the Frimpter Method employs for accurate estimations.