| Terms |
Definition |
| flood |
An overflow of water onto lands that are used or usable by man and not normally covered by water. |
| floodplain |
A strip of relatively flat and normally dry land alongside a stream, river, or lake that is covered by water during a flood |
| flow |
Move or progress freely as if in a stream |
| ground water |
Water that flows or seeps downward and saturates soil or rock, supplying springs and wells |
| habitat |
The locality in which a plant or animal naturally lives |
| hardness |
A water-quality indication of the concentration of alkaline salts in water, mainly calcium and magnesium |
| headwater |
The small streams that come together to form a river |
| infiltration |
Flow of water from the land surface into the subsurface |
| irrigation |
The controlled application of water for agricultural purposes through manmade systems to supply water requirements not satisfied by rainfall |
| leaching |
The process by which soluble materials in the soil, such as salts, nutrients, pesticide chemicals or contaminants, are washed into a Lower layer of soil or are dissolved and carried away by water. |
| macroinvertebrates |
Animals without backbones that are big enough to see with the naked eye |
| monitor |
To conduct a planned sequence of observations or measurements to assess whether a CCP is under control and to produce an accurate record for future use in verification. |
| municipal water suppy |
A water system that has at least five service connections or which regularly serves 25 individuals for 60 days |
| nephelometric turbidity unit (NTU) |
Unit of measure for the turbidity of water. Essentially, a measure of the cloudiness of water as measured by a nephelometer |
| non source point pollution (NPS) |
Pollution discharged over a wide land area, not from one specific location |
| organic matter |
Plant and animal residues, or substances made by living organisms. All are based upon carbon compounds. |
| outfall |
The place where a sewer, drain, or stream discharges |
| oxygen demand |
The need for molecular oxygen to meet the needs of biological and chemical processes in water
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