Directions: Drag the red slider up and down to see how
different amounts of dissolved oxygen affect the image.
Guideline for Interpretation of Dissolved Oxygen Readings: For mg/L measurements:
0-2 mg/L: not enough oxygen to support life
2-4 mg/L: only a few kinds of fish and insects can survive
4-7 mg/L: acceptable for warm water fish
7-11 mg/L: very good for most stream fish including cold water fish
About the image transformation: The corners of the bitmap image are set to rotate. The higher the dissolved oxygen (meaning the healthier the water) the less distortion there is in the image. If the dissolved oxygen reading is quite low, say 1.5 mg/L, there is a great deal of distortion in the image.