039 GROUND-WATER FLOW MODEL

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039 GROUND-WATER FLOW MODEL
MATERIALS REQUIRED
Plastic bottle Transparent straws Plastic syringe
Gravel, Sand, Topsoil
Syringe
Bottle
Straws
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METHOD  
Cut the top of the plastic bottle. Place at
least two inches of gravel on the bottom of the
bottle. Position the two straws into the
container and layer three inches of sand on top
of the gravel. Make sure you hold the straws in
place as you pour in the sand. Add two inches
of top soil on top of the sand
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Add water to the model slowly to saturate the
sand and gravel layers. Insert a syringe into
one of the straws and withdraw some water.
Observe what occurs. Move the syringe to the
other straw and remove water through it. Note
the effect on the level of the groundwater
. Inject food coloring into one of the wells
(straws) to represent a contaminant. Observe how
the contaminant enters the groundwater