groundwater

what do we call if all pore space is filled with water (not void )

saturated

some pore spaces have air ( not void again)

unsaturated

it has a water that is positive gage pressure

phreatic

it has a water that is negative gage pressure

vadose

it is a boundary between vadose and phreatic zones: gage pressure is zero at this table.

water table

it is in equilibrium with water table. it lies entirely in the vadose zone and includes both saturated and unsaturated parts

capillary fringe

fraction of rock occupied by pore space.

porosity

a layer that yields sufficient water to be worth pumping. Should be permeable

Aquifer

the opposite of an aquifer, it does not yield enough water to be worth pumping.

Aquitard

place where the water table intersects the land surface and water flows out. Usually
this is a seep if slow enough. Most stream beds are springs.

Spring

is lowering of piezometric surface due to pumping around a well.

Cone of depression

it means that the piezometric surface is above the land surface.

flowing

it is a surface of hydraulic head

Piezometric surface