The permanently saturated zone within solid rocks and sediments is the phreatic zone.

The permanently saturated zone within solid rocks and sediments is the phreatic zone.

• A. Water table
• B. Porosity
• C. Phreatic zone
• D. Infiltration capacity

Answer: (C)

In hydrogeology, the phreatic zone is the permanently saturated part of the subsurface, where all pore spaces are filled with water. This saturated region can extend through solid rocks and sediments and forms the groundwater reservoir. The upper boundary of this zone is the water table, which separates it from the unsaturated vadose zone above. Porosity describes how much void space a material has and influences storage, but it is not the zone itself. Infiltration capacity relates to how fast water enters the soil at the surface, not the internal saturation of the subsurface. Therefore, the permanently saturated zone within solid rocks and sediments is the phreatic zone.

In hydrogeology, the phreatic zone is the permanently saturated part of the subsurface, where all pore spaces are filled with water. This saturated region can extend through solid rocks and sediments and forms the groundwater reservoir. The upper boundary of this zone is the water table, which separates it from the unsaturated vadose zone above. Porosity describes how much void space a material has and influences storage, but it is not the zone itself. Infiltration capacity relates to how fast water enters the soil at the surface, not the internal saturation of the subsurface. Therefore, the permanently saturated zone within solid rocks and sediments is the phreatic zone.