What is perched water?

Perched water refers to groundwater that is found above the regional water table and is supported by an impermeable layer, such as clay or dense soil, which acts as a barrier. This configuration allows the perched water to accumulate in specific zones, leading to localized saturation above the general groundwater level. The presence of this impermeable material is critical as it prevents the perched water from draining down to the underlying water table.

Understanding perched water is important in the context of erosion and sediment control because it influences local hydrology and can affect the stability of slopes in construction and natural areas. It is also significant in assessing drainage issues and potential flooding scenarios since perched water can create unexpected conditions in the landscape.