GROUND WATER

POINTS TO BE COVERED ON GROUND WATER

1. How does ground water move? What is porosity? permeability?

Infiltration?2. How is ground water formed?3. What is an aquifer, 4. Be able to discuss the use of wells in ground water, including

potential problems.

ORIGIN OF GROUND WATER

When precipitation falls on the land surface, what happens to it?

Goes back into the H20 cycle, or is runs over land surface

Afterwards, it infiltrates (Flow into) the land surface and percolates (seeps) downward and becomes ground water

GROUND WATER AS PART OF THE HYDROLOGIC

CYCLE

GROUNDWATER

When water passes through the sediment’s pores and is contain underground after reaching a surface that it cannot penetrate.

P

orosity: amount of spacing in

sediment material.

P

orosity depends upon:

-

shape of grains

-

arrangement of grains

-

size distribution

-

compaction

HOW DOES GROUND WATER MOVE?

P

ermeability: ability of an

material to allow the

passage of H2O

D

epends upon

-

Porosity (spacing between

sediment

WHAT IS AN AQUIFER? A

permeable, water-containing unit.

Area where groundwater is temporarily

stored.

Groundwater can leave by flowing to

streams, springs, or to wells

WHAT ARE SOME OTHER PROBLEMS ASSOCIATED

WITH THE USE OF WELLS?

•L

ack of filtering in under privilege regions.

•L

imited amounts of groundwater in some rock

types.

•R

unoff- pollution invasion.