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Water Quality
Hydrology
Term | Definition |
---|---|
Nitrates | A chemical form of nitrogen found in water. Common in sewage and fertilizer. Can cause algal blooms that block sunlight and use up oxygen when present in large quantities. |
Phosphates | A chemical form of phosphorous found in water. Common in sewage and fertilizer. Can cause algal blooms that block sunlight and use up oxygen when present in large quantities. |
Turbidity | The relative clarity (clearness) of the water. |
Bioindicators | Living organisms (usually macroinvertebrates) whose presence or absence tell us about the quality of the water. |
Pollution tolerant | Organisms that can tolerate (live with) pollution |
Pollution intolerant | Organisms that CANNOT tolerate (live with) pollution |
pH | A measure of the relative acidity or alkalinity of water. The pH scale goes from 0-14. A pH of 7 is neutral (pure water). pH values below 7 are acids; pH values above 7 are bases (alkalines) |
Run-off | Water that does not soak into the ground, but instead runs over the land into streams and lakes |
Dissolved oxygen | The oxygen in the water that is available for aquatic life. Fast moving, cool water has more dissolved oxygen. Slow moving, warm water has less dissolved oxygen. |
Temperature | A measure of how hot or cold the water is. Warm water tends to have less dissolved oxygen. |