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Low Water (VDC_5)
DGIF baseline 2026-1, the latest. Earlier baselines: timemap.
RDF: vdc_5.ttl
- Name
lowWater- Attribute
- VDC Sounding Datum
- Definition
- An approximation of mean low water adopted as the reference level for a limited region, irrespective of better determinations later.
- Description
- Used mostly in harbour and river engineering. Used in inland waters. It is generally defined as a level which the daily mean water level would fall below less than 5 percent of the time and by no more than 0.2 metres during the navigation season. A single level surface is usually chosen as the low water datum for a whole lake. On a river, low water datum is a sloping surface, which approximates the surface of the river at a low state.
- Synonyms
- LW
- Accepted
- 2013-10-18
- Allowed for
Source: DGIF 2026-1 QEA model, DGIWG. Standard: DGIWG 206-3. Licence: CC BY 4.0, © DGIWG.