Chapter 5 - Groundwater Quality and Wells Flashcards
A well feature that prevents contamination from entering the well.
Sanitary Seal
The metal pipe used to line the borehole of a well.
Well Casing
A concrete area placed around the casing of some wells to support pumping equipment and to help prevent surface water from contaminating the well water.
Well Slab
A well feature that prevents rock and soil from entering the well while letting water in.
Well Screen
The level of the water in the well when no water is being taken from the aquifer.
Static Water Level
The upper surface of the zone of saturation closest to the ground surface.
Water Table
The difference between the static water level and the pumping level in a well.
Drawdown
The cone-shaped depression on the groundwater level around a well during pumping.
Cone of Depression
The rate of water withdrawal that a well can supply over a long period of time.
Well Yield
A well’s pumping rate divided by the drawdown.
Specific Capacity
A very wide, relatively shallow caisson that has horizontally drilled wells with screen points at the bottom.
These wells are large producers.
Radial Well
A subsurface structure to receive water filtered through a streambed.
Infiltration Gallery
