Item Type : Enumerated
Domain : IHO Hydro
Associated Attribute :
EnumeratedName: Low Water
Enumerated Value Code Number : 13
Enumerated Value Code In Use :
Alias : Low Tide; LW
CamelCase : lowWater
Definition : An approximation of mean low water adopted as the reference level for a limited area, irrespective of better determinations at a later date.
Reference : Chapter 2, Page 2.239
Definition Source : IHO Transfer Standard for Digital Hydrographic Data, Appendix A: Object Catalogue - Description of the Feature Coding Schema to be Used for Hydrographic Requirements
Similarity to Source : Identical
Int1 :
S4 :
Remarks : Used mostly in harbour and river engineering. Used in inland (non-tidal) waters. It is generally defined as a level which the daily mean water level would fall below less than 5% 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 river surface at a low state.
Management Details
Proposal Type : Supersession
Submitting Organization : IHO Secretariat
Proposed Change : Standardize Item Name. Add aliases. Add definition source, reference and similarity. Add INT1 and S-4 references.
Justification : Standardization of Register content.
Proposed : 2019-09-02
Accepted :
Amended : 2019-09-03
Successor : lowWater
Predecessor : lowWater