Odd Fluctuations in Data Odd Fluctuations in Data Dissolved Oxygen Seasonal fluctuations due to water temperature.
Cold water holds more dissolved oxygen than warm water.
On the west branch, pH runs lower than the main branch. The drop in pH is caused by mine acid drainage and runoff from old culm banks. When there is heavy rainfall, pH drops due to runoff from the culm banks. Carbon Dioxide Seasonal fluctuations due to respiration of aquatic organisms and chemical decomposition of organic material. Winter produces less carbon dioxide than summer because water is colder, which slows down the metabolism of cold blooded organisms and chemical decomposition.