Pohjavedessä
Pohjavedessä, or groundwater, refers to the portion of Earth’s water that saturates the pores of soil and rock beneath the water table. It forms a connected underground reservoir that can feed springs, rivers, and wells, and it serves as a major source of drinking water in many regions. The groundwater system consists of aquifers, where water is stored and transmitted, and confining layers that limit flow. The water’s movement is typically slow and governed by the properties of the surrounding material, such as porosity and permeability.
Recharge occurs mainly through infiltration from precipitation and surface water, while discharge happens through wells, springs,
Ecologically, pohjavedessä supports specialized microbial communities and, in some places, subterranean fauna adapted to low light
Human use and protection emphasize groundwater as a vital drinking-water source, requiring careful management to prevent