Glossary of Hydrologic Terms - N
Glossary of Hydrologic Terms - N
These definitions have been compiled from various sources, including the USGS's Water Resources Data, Weather Service Operations Manual, Chapter E-90, and Glossary of Meteorology (AMS, 1959).
- National Climatic Data Center (NCDC)
- The repository for all climatological data in the U.S. The NCDC is located in Asheville, North Carolina.
- natural control
- A stream gaging control which is natural to the stream channel, in contrast to an artificial control structure by man.
- navigation methods
- Three basic methods of providing and managing inland waterways:
- run-of-the-river: no provision of upstream storage
- slack-water: locks and dams provide slack water or pools with adequate depth for the draft of heavy barges and area to prevent excessive velocities
- canalization: in lieu of a series of dams on the river, a canal with locks adjoins the river.
- National Environmental Satellite, Data, and Information Service (NESDIS)
- NESDIS collects, processes, stores, analyzes, and disseminates various types of hydrologic, meteorological, and oceanic data. NESDIS is also responsible for the development of analytical and descriptive products so as to meet the needs of its users.
- net rainfall
- The portion of rainfall which reaches a stream channel or the concentration point as direct surface flow.
- neve (snow)
- Same as firn snow
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Glossary of Hydrologic Terms - N
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