water color

1. University of Salahaddin
College of Education
Biology department
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Halala Rahman Qadir
M.Sc. Plant physiology
4/3/2015

2. Water color
• Clean water, free from harmful organisms and
chemical substances, is a necessity for human
society. Generally, groundwater maintains a
better quality than surface waters. Nevertheless,
millions of people in the Nordic countries use
drinking water originating from lakes and streams.
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3. • In Sweden for example, around 50% of the
population use surface water, 25% use it after
artificial infiltration, while only 25% get their
drinking water from groundwater wells.
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Water color

4. Color of lakes and oceans
Lakes and oceans appear blue for several reasons.
One is that the surface of the water reflects the
color of the sky. While this reflection contributes to
the observed color, it is not the sole reason.
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5. Factors of Water color
1- Water itself has an intrinsic blue color that is a
result of its molecular structure and its behavior.
2- There are other factors that can affect our
perception of the color of water. For example,
particles in water can absorb light, scatter light,
and reflect light. Light may be absorbed by
particles and solutes, as evidenced by the darker
color of tea or coffee.
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7. 3- Green algae in rivers and streams often lends a
blue-green color to the water. Some mountain
lakes and streams that contain finely ground
rock, such as glacial flour, are turquoise. The
surface of water can also reflect skylight.
4- We see water in a variety of ways. It may be
colored by particles, the presence of bacteria,
or by reflecting the world above its surface. Ice
and snow may reveal a vivid internal blue.
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Factors of Water color

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