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?
Post on 01-Apr-2015
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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.
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