Transcript Slide 1

water
May 2-8, 2010:
National
Drinking Water
Week!
Let’s talk about “Water”
In some
parts of the
year, the
Amazon can
be over 120
miles wide in
Belém!
The Amazon
carries 1/5 of
all the worlds
river water:
more than
the next 10
largest rivers
combined!
How does water move from one
part of the watershed to
another?
Where does
Get its water?
11% - Local Groundwater
1% - Recycled
48%- Owens Valley (Sierras)
41% - No. California (Sierras) and Colorado River
…So why is it important to protect our ground water?
What happens to waste water?
But how
do we
know if
the water
is clean?
Biological Oxygen Demand (BOD)
Dissolved Oxygen (DO)
Coliform Bacteria
Nitrates
pH / Alkalinity
Phosphates
Temperature
Benthic Macroinvertebrates
Total Dissolved Solids
Turbidity
Your Task
• Generate a
hypothesis about the
health of your stream
• Design an experiment
to test your
hypothesis using the
variables you have at
your disposal.
– You should test three
variables.
Your Task
• You will need to fill in
your lab report as you
go. Every thing you
do will be a step in
testing your
hypothesis about your
stream.
• In the end, you will
decide how healthy
your stream is based
on your results.