The water table is the upper limit of the zone of saturation.
zone of aeration.
aquifer zone.
well zone.

zone of saturation

Explanation:

The water table is the upper limit of the zone of saturation. At the zone of saturation, the aquifers are filled with water completely. The void spaces within the rock particles are taken up by fluids.

The upper limit of this zone is the water table.

Above the water table is the zone of aeration where the pore spaces are filled within air.

During the time of recharge especially raining seasons, part of the zone of aeration are filled with water.

i think it because equal matrices have equal dimensions, only square matrices can be symmetric. for all indices and . every square diagonal matrix is symmetric, since all off-diagonal elements are zero. in linear algebra, a real symmetric matrix represents a self-adjoint operator over a real inner product space.

at right angles to each other