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Water Glossary - V
Vapor: The gaseous phase of substances that are liquid or solid at atmospheric temperature and pressure, e.g., steam.
Vaporize: Conversion of a liquid into vapor.
Venturi: A channel that serves the measurement of water flows.
Vested water right: The right granted by a state water agency to use either surface or ground water.
Virgin flow: The streamflow which exists or would exist if man had not modified the conditions on or along the stream or in the drainage basin.
Viruses: The smallest life forms known, that are not cellular in nature. They live inside the cells of animals, plants and bacteria and often cause disease. They are made up of a chromosome surrounded by a protein shell.
Viscosity: The syrupiness of water and it determines the mobility of the water. When the temperature rises, the viscosity degrades; this means that water will be more mobile at higher temperatures.
VOC: Volatile Organic Compound. Synthetic organic compounds which easily vaporize and are often carcinogenic.
Void: The pore space or other openings in rock. The openings can be very small to cave size and are filled with water below the water table.
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