Water Quality

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Storyboard Description

Water Quality main concepts to remember and review for the interim assessment in two weeks.

Storyboard Text

  • The quality of water is determined by a few factors. These factors are Dissolved Oxygen, temperature, pH, nitrates and phosphates and turbidity.
  • Water Quality
  • Dissolved Oxygen (DO
  • Dissolved oxygen (DO) is always needed for good water quality.
  • Temperature
  • Warm to hot water causes catastrophic effects.
  • Water is not ALWAYS at it seems
  • pH (acidity and alkalinity)
  • Dissolved oxygen enters the water three ways. Fast moving/rolling water traps oxygen from the atmosphere. Colder water holds more oxygen than warmer water. The root systems of vegetation as they go through the photosynthesis process.
  • Phosphates and Nitrates
  • Different fishes and aquatic life live in preferred water around 62 degrees Fahrenheit. Super heated water returned from a power plant for instance, can destroy the aquatic environment.
  • Turbidity
  • Water can become turbid in a variety of ways. You would describe the water as "dirty" or "clean".
  • Cities like Chicago seen here have many impervious areas, like sidewalks, roads, parking lots and roof tops making it difficult for water to be absorbed and naturally clean before it reenters the local water.
  • Many think water should be one or the other to be "good", but that's far from the truth! If water is acidic or basic it can have the same effect.
  • Some times we know the source of the chemicals; point-source pollution and other times we do not; non-point source pollution. These chemicals are found in animal waste, fertilizers, insecticides and herbicides.
  • Phosphates and Nitrates occur naturally. When chemicals enter the environment that are not necessary, this increases their abundance.
  • Turbidity of water is described by the amount of particles suspended in the water column. These particles can be soil blown in from wind, runoff from roads and other impervious features and dead, organic matter.
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