During organic decomposition, organic matter is broken down by
bacteria. BOD is calculated by taking the level of DO and testing the sample 5 days
later. The amount of oxygen that the bacteria use is the BOD of the water.
There is nothing wrong with high levels of oxygen demand but it does take away
for the organisms in the water.
Biotic Influences: leaves
and fertilizers contribute to the bacteria that break down the organic matter
in the streams.
Abiotic Influences: The
sun is a form of an Abiotic influence. The sun provides the energy that will
help the bacteria break down the organic matter on the bottom of the stream.
Our Data:
Q-Value 97
Total 14.29
Batavia – 2.94mg/L
Q-Value 96
Total 10.56