| A | B |
|---|
| Saltwater Intrusion | When salt water enters a freshwater ground supply as a result of overuse |
| Cone of depression | The dry area around an overused well |
| Desalinization | Removal of salt from water |
| Drip irrigation | An agricultural method that waters crops in small amounts, very close to or on the ground surface |
| Sewage | Waste from households and businesses (toilets, showers, washing machines, etc) |
| Contour farming | Plowing with the contours of the land to minimize runoff |
| Point source pollution | Pollution coming from specific locations such as drain pipes or sewage treatment plants |
| Non-point source pollution | Pollution with no specific location of discharge such as golf courses, lawns, and parking lots |
| Oxygen sag | The area downstream of a source of organic pollution, where decomposition is increased and the BOD is high |
