Horizontal zone that extends from the top of the water table to the ground surface. Soil and rock pore spaces in this zone may and may not have water.

In hydrologic terms, the locus of points just above the water table where soil pores may either contain air or water. This is also called the vadose zone

Zone immediately below the ground surface within which pore spaces are partially filled with water and partially filled with air.

section of land above the water table, containing both earth and air.

That portion of the lithosphere in which the pore spaces in rock, soil material, and soil are partially or temporarily filled with air, that is, the region above the water table and its accompanying c [..]

Upper soil layers that hold both air and water. zone of differentiation

underground region in which the pore spaces are filled mostly with air. zone of saturation -

Zone immediately below the ground surface within which pore spaces are partially filled with water and partially filled with air.

the portion of the ground from the Earth's surface down to the water table - the zone of aeration is not saturated with water because its pores are filled partly by air and partly by water

The comparatively dry soil or rock located between the ground surface and the top of the water table.

The locus of points just above the water table where soil pores may either contain air or water. This is also called the vadose zone.

In hydrologic terms, the locus of points just above the water table where soil pores may either contain air or water. This is also called the vadose zone

a region in the Earth above the water table. Water in the zone of aeration is under atmospheric pressure and will not flow into a well.

the zone between the ground surface and the water table

In hydrologic terms, the locus of points just above the water table where soil pores may either contain air or water. This is also called the vadose zone